{"id":6989,"date":"2024-05-29T05:51:26","date_gmt":"2024-05-29T05:51:26","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=6989"},"modified":"2024-05-29T05:51:26","modified_gmt":"2024-05-29T05:51:26","slug":"analysis-of-the-development-status-of-polyurethane-adhesives","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/tr\/analysis-of-the-development-status-of-polyurethane-adhesives\/","title":{"rendered":"Poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131lar\u0131n geli\u015fim durumunun analizi"},"content":{"rendered":"

Poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131lar\u0131n geli\u015fim durumunun analizi<\/p>\n

Son y\u0131llarda, malzeme geli\u015ftirme seviyesinin h\u0131zla iyile\u015fmesiyle birlikte, daha g\u00fc\u00e7l\u00fc uygulanabilirli\u011fe sahip \u00e7e\u015fitli yap\u0131\u015ft\u0131r\u0131c\u0131lar birbiri ard\u0131na ortaya \u00e7\u0131km\u0131\u015f ve yap\u0131\u015ft\u0131r\u0131c\u0131 pazar\u0131n\u0131 b\u00fcy\u00fck \u00f6l\u00e7\u00fcde zenginle\u015ftirmi\u015ftir. Poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131, m\u00fckemmel esnekli\u011fe, darbe direncine, kimyasal dirence, a\u015f\u0131nma direncine ve en \u00f6nemlisi d\u00fc\u015f\u00fck s\u0131cakl\u0131k direncine sahip orta-y\u00fcksek dereceli bir yap\u0131\u015ft\u0131r\u0131c\u0131d\u0131r. Hammaddeleri ve form\u00fclasyonlar\u0131 ayarlayarak, \u00e7e\u015fitli malzemeler aras\u0131nda ve farkl\u0131 ama\u00e7lar i\u00e7in yap\u0131\u015ft\u0131rmaya uygun bir\u00e7ok poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131 t\u00fcr\u00fc tasarlamak m\u00fcmk\u00fcnd\u00fcr.<\/p>\n

Poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131lar ilk olarak 1947 y\u0131l\u0131nda askeri alanda uygulanm\u0131\u015f, trifenilmetan triizosiyanat Bayer taraf\u0131ndan metal ve kau\u00e7u\u011fun yap\u0131\u015ft\u0131r\u0131lmas\u0131nda ba\u015far\u0131yla uygulanm\u0131\u015f ve tanklar\u0131n paletleri \u00fczerinde kullan\u0131larak poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131 end\u00fcstrisinin temelini atm\u0131\u015ft\u0131r. 1954 y\u0131l\u0131nda Japonya, Alman ve ABD teknolojisinin tan\u0131t\u0131m\u0131, 1960 y\u0131l\u0131nda poli\u00fcretan malzemelerin \u00fcretimi, 1966 y\u0131l\u0131nda poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131lar\u0131n \u00fcretimi, ba\u015far\u0131l\u0131 vinil poli\u00fcretan su bazl\u0131 yap\u0131\u015ft\u0131r\u0131c\u0131lar\u0131n geli\u015ftirilmesi ve 1981 y\u0131l\u0131nda end\u00fcstriyel \u00fcretime ba\u015flad\u0131.<\/p>\n

1956 y\u0131l\u0131nda \u00c7in, trifenilmetan triizosiyanat (Lechner yap\u0131\u015ft\u0131r\u0131c\u0131) geli\u015ftirdi ve \u00fcretti ve k\u0131sa s\u00fcre sonra \u00c7in'de hala en b\u00fcy\u00fck poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131 \u00fcretimi olan iki bile\u015fenli solvent bazl\u0131 poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131 olan toluen diizosiyanat (TDI) \u00fcretti. Bundan sonra \u00c7in, yurtd\u0131\u015f\u0131ndan \u00e7ok say\u0131da ithal poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131 ve bunlar\u0131n e\u015fle\u015ftirilmesini gerektiren bir\u00e7ok geli\u015fmi\u015f \u00fcretim hatt\u0131n\u0131 ve \u00fcr\u00fcn\u00fc art arda tan\u0131tt\u0131, b\u00f6ylece yerli ara\u015ft\u0131rma birimlerini poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131lar\u0131n geli\u015fimini h\u0131zland\u0131rmaya te\u015fvik etti. \u00d6zellikle 1986'dan sonra \u00c7in'in poli\u00fcretan end\u00fcstrisi h\u0131zl\u0131 bir geli\u015fme d\u00f6nemine girdi. Uzun bir s\u00fcre boyunca, \u00c7in'deki poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n fiyat\u0131 \u00e7ok y\u00fcksektir ve olduk\u00e7a uzun bir s\u00fcre boyunca, poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n fiyat\u0131 neopren yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n 1 ila 2 kat\u0131d\u0131r. Son y\u0131llarda, poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n fiyat\u0131 d\u00fc\u015fmektedir ve \u015fu anda, poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n fiyat\u0131 neopren yap\u0131\u015ft\u0131r\u0131c\u0131dan sadece yakla\u015f\u0131k 20% daha y\u00fcksektir, bu da poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n neopren yap\u0131\u015ft\u0131r\u0131c\u0131 pazar\u0131n\u0131 i\u015fgal etmesi i\u00e7in ko\u015fullar sa\u011flar.
\nPoli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131 \u00fcretim y\u00f6ntemleri aras\u0131nda \u00e7\u00f6zelti y\u00f6ntemi ve kat\u0131 re\u00e7ine \u00e7\u00f6zme y\u00f6ntemi bulunmaktad\u0131r. \u015eu anda, \u00c7in anakaras\u0131nda ayakkab\u0131lar i\u00e7in poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131 \u00fcreten y\u00fczden fazla i\u015fletme bulunmaktad\u0131r ve bunlar\u0131n aras\u0131nda 10.000 ton\/y\u0131ldan fazla \u00fcretim kapasitesine sahip Nanguang ve Baili gibi yirmiden fazla b\u00fcy\u00fck \u00f6l\u00e7ekli i\u015fletme bulunmaktad\u0131r ve temelde hepsi poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n \u00e7\u00f6z\u00fcnmesi ve \u00fcretimi i\u00e7in \u0130spanya, Almanya, Amerika Birle\u015fik Devletleri ve \u00c7in Tayvan'\u0131ndan ithal edilen re\u00e7ineleri kullanmaktad\u0131r. \u00c7ok say\u0131da \u00fcretici g\u00f6z \u00f6n\u00fcne al\u0131nd\u0131\u011f\u0131nda, rekabet gittik\u00e7e yo\u011funla\u015f\u0131yor, teknik ve fiyat avantajlar\u0131na sahip olmak i\u00e7in, baz\u0131 b\u00fcy\u00fck yap\u0131\u015ft\u0131r\u0131c\u0131 fabrikalar\u0131 poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131 cihazlar\u0131n \u00fcretimi i\u00e7in \u00e7\u00f6z\u00fcm y\u00f6ntemi olu\u015fturmaya ba\u015flad\u0131, bu nedenle \u00e7\u00f6z\u00fcnme y\u00f6ntemiyle poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131 \u00e7\u0131kt\u0131s\u0131n\u0131n oran\u0131 azalacak.
\n\u015eu anda, yayg\u0131n poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131 solvent bazl\u0131d\u0131r. Neopren yap\u0131\u015ft\u0131r\u0131c\u0131 gibi, toksisite ve \u00e7evre kirlili\u011fi sorunlar\u0131 vard\u0131r. Son y\u0131llarda, '\u00fc\u00e7 benzen' poli\u00fcretan kau\u00e7uk yoktur, yani ketonlar\u0131n, esterlerin ve di\u011fer kar\u0131\u015f\u0131k \u00e7\u00f6z\u00fcc\u00fclerin kullan\u0131m\u0131, toksisite azalm\u0131\u015ft\u0131r, ancak sorun temelde \u00e7\u00f6z\u00fclmemi\u015ftir.
\nReaksiyon bile\u015fimine g\u00f6re poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131, poliizosiyanat yap\u0131\u015ft\u0131r\u0131c\u0131, izosiyanat baz i\u00e7eren poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131, hidroksil poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131 i\u00e7eren poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131 ve poli\u00fcretan re\u00e7ine yap\u0131\u015ft\u0131r\u0131c\u0131 olarak ayr\u0131labilir. S\u0131n\u0131fland\u0131rman\u0131n kullan\u0131m\u0131na ve \u00f6zelliklerine g\u00f6re, genel ama\u00e7l\u0131 yap\u0131\u015ft\u0131r\u0131c\u0131lar, g\u0131da ambalaj\u0131 yap\u0131\u015ft\u0131r\u0131c\u0131lar\u0131, ayakkab\u0131 yap\u0131\u015ft\u0131r\u0131c\u0131lar\u0131, ka\u011f\u0131t-plastik kompozit yap\u0131\u015ft\u0131r\u0131c\u0131lar, in\u015faat yap\u0131\u015ft\u0131r\u0131c\u0131lar\u0131, yap\u0131sal yap\u0131\u015ft\u0131r\u0131c\u0131lar, ultra d\u00fc\u015f\u00fck s\u0131cakl\u0131k yap\u0131\u015ft\u0131r\u0131c\u0131lar\u0131, k\u00f6p\u00fck tipi yap\u0131\u015ft\u0131r\u0131c\u0131lar, anaerobik yap\u0131\u015ft\u0131r\u0131c\u0131lar, iletken yap\u0131\u015ft\u0131r\u0131c\u0131lar, eriyebilir yap\u0131\u015ft\u0131r\u0131c\u0131lar, bas\u0131nca duyarl\u0131 yap\u0131\u015ft\u0131r\u0131c\u0131lar, kapal\u0131 tip yap\u0131\u015ft\u0131r\u0131c\u0131lar, su bazl\u0131 yap\u0131\u015ft\u0131r\u0131c\u0131lar ve s\u0131zd\u0131rmazl\u0131k yap\u0131\u015ft\u0131r\u0131c\u0131lar\u0131 vb. olarak ayr\u0131labilir.<\/p>\n

'Poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131lar ayakkab\u0131 malzemelerinin \u00fcretim s\u00fcrecinde yayg\u0131n olarak kullan\u0131lmaktad\u0131r, peki ayakkab\u0131lar i\u00e7in poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131lar\u0131n \u00f6zellikleri nelerdir? Ve yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n performans\u0131n\u0131 etkileyecek fakt\u00f6rler nelerdir?
\nAyakkab\u0131lar i\u00e7in poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131, di\u011fer poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131lar gibi, m\u00fckemmel d\u00fc\u015f\u00fck s\u0131cakl\u0131k performans\u0131na, d\u00fc\u015f\u00fck k\u00fcrlenme s\u0131cakl\u0131\u011f\u0131na, m\u00fckemmel esnekli\u011fe, darbe direncine, \u0131slanabilirli\u011fe ve bir\u00e7ok malzemeye yap\u0131\u015fmaya sahiptir. Bu nedenle, normal s\u0131cakl\u0131k, h\u0131zl\u0131 k\u00fcrlenme ve esneklik gerektiren uygulamalarda yayg\u0131n olarak kullan\u0131l\u0131r ve \u00f6zellikle farkl\u0131 genle\u015fme katsay\u0131lar\u0131na sahip benzer olmayan malzemelerin yap\u0131\u015ft\u0131r\u0131lmas\u0131 i\u00e7in uygundur.
\nAyakkab\u0131 yap\u0131m\u0131 i\u00e7in yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n performans gereksinimleri farkl\u0131 malzemelere, ayakkab\u0131 t\u00fcrlerine ve yap\u0131\u015ft\u0131rma i\u015flemlerine g\u00f6re de\u011fi\u015fir, ancak bir b\u00fct\u00fcn olarak ayakkab\u0131 yap\u0131\u015ft\u0131r\u0131c\u0131s\u0131 a\u015fa\u011f\u0131daki \u00f6zelliklere sahip olmal\u0131d\u0131r:
\nHeterojen malzemeler ve farkl\u0131 kristalli malzemeler i\u00e7in yeterli yap\u0131\u015fma mukavemeti ve y\u00fcksek soyulma mukavemeti;
\nAyakkab\u0131 \u00fcretim hatt\u0131n\u0131n gereksinimlerine uyum sa\u011flamak i\u00e7in y\u00fcksek ilk yap\u0131\u015fma; \u00f6zellikle y\u00fcksek soyulma mukavemeti;
\nBoyutland\u0131rma i\u015flemi basittir, kullan\u0131m\u0131 kolayd\u0131r, kullan\u0131m s\u00fcresi ayakkab\u0131 \u00fcretim hatt\u0131n\u0131n ihtiya\u00e7lar\u0131na g\u00f6re ayarlanabilir;
\nOrta derecede \u0131s\u0131 direncine, yeterli su direncine ve yap\u0131\u015fkan dayan\u0131kl\u0131l\u0131\u011f\u0131na sahiptir.
\nAyakkab\u0131lar i\u00e7in poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131 yukar\u0131daki gereksinimleri kar\u015f\u0131layabilir ve ilk yap\u0131\u015fkanl\u0131\u011f\u0131 neopren yap\u0131\u015ft\u0131r\u0131c\u0131dan daha k\u00f6t\u00fcd\u00fcr, ancak \u015fu anda yurti\u00e7i ve yurtd\u0131\u015f\u0131ndaki ara\u015ft\u0131rmac\u0131lar, temelde \u00e7\u00f6z\u00fclm\u00fc\u015f olan ilk yap\u0131\u015fkanl\u0131\u011f\u0131 iyile\u015ftirmek i\u00e7in y\u00f6ntemler ortaya koymu\u015flard\u0131r. Yumu\u015fak ve modifiye PVC son y\u0131llarda kimyasal ayakkab\u0131lar\u0131n ana malzemelerinden biridir, poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131 bu t\u00fcr malzemeleri yap\u0131\u015ft\u0131rma i\u015flevine sahiptir. Sadece neopren yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n geni\u015f uygulanabilirli\u011finin yan\u0131 s\u0131ra m\u00fckemmel elastikiyet, yumu\u015fakl\u0131k ve esneme direncine sahip olmakla kalmaz, ayn\u0131 zamanda ikincisinden daha iyi su direnci, ya\u011f direnci ve \u0131s\u0131 direncine sahiptir.
\nBuna ek olarak, poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131, mikro h\u00fccreli poli\u00fcretan elastomerler, k\u00f6p\u00fckler ve m\u00fckemmel a\u015f\u0131nma direncine sahip sentetik deriler ve m\u00fckemmel ya\u011f ve benzin direncine sahip siyano kau\u00e7uklar ve termoplastik kau\u00e7uklar (SBR, SBS, SIS, vb.) gibi genel yap\u0131\u015ft\u0131r\u0131c\u0131lar i\u00e7in zor olan ayakkab\u0131 yap\u0131m malzemelerini yap\u0131\u015ft\u0131rabilir. Bu malzemeler, g\u00fczel, hafif ve rahat ayakkab\u0131lar ve botlar yapmak i\u00e7in y\u00fcksek derecede d\u00f6v\u00fclebilir polivinil klor\u00fcr veya nefes alabilen poli\u00fcretan sentetik deri \u00fcst malzemelerle birlikte ayakkab\u0131 yap\u0131m end\u00fcstrisinde taban malzemesi olarak yayg\u0131n \u015fekilde kullan\u0131lmaktad\u0131r.
\nAyakkab\u0131 yap\u0131m\u0131nda, yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n performans\u0131n\u0131 etkileyen ana fakt\u00f6rler \u015funlard\u0131r:
\nPolyester \u00e7e\u015fitlerinin yap\u0131\u015ft\u0131r\u0131c\u0131 performans\u0131 \u00fczerindeki etkisi. Poliadipik asit s\u0131n\u0131f\u0131 poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131 sistemi, yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n kristalli\u011fi, a\u015fa\u011f\u0131daki artan s\u0131rayla kar\u015f\u0131l\u0131k gelen ilk yap\u0131\u015fma: etilen glikol < L, 4-b\u00fctandiol < 1, 6-hekzandiol e\u015fit say\u0131da karbon atomu diol sentezlenmi\u015f poli\u00fcretan, molek\u00fcl\u00fcn hidrojen sa\u011flayan gruplar\u0131na (NH- gibi) ve elektron sa\u011flayan gruplar\u0131na (-C-O- gibi) yakla\u015fmak daha kolayd\u0131r. Daha fazla hidrojen ba\u011f\u0131 daha kolay olu\u015fturulabilir ve bu da polimer molek\u00fcler zincirinin kristalle\u015fmesini kolayla\u015ft\u0131r\u0131r. Karbon atomu say\u0131s\u0131 4'ten az olan glikoller, ilk tutunma g\u00fc\u00e7lerinin zay\u0131f olmas\u0131 nedeniyle ayakkab\u0131 yap\u0131\u015ft\u0131r\u0131c\u0131s\u0131 olarak kullan\u0131lmaya uygun de\u011fildir. Hammaddelerin fiyat fakt\u00f6r\u00fc g\u00f6z \u00f6n\u00fcne al\u0131nd\u0131\u011f\u0131nda, ayakkab\u0131lar i\u00e7in poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n ana hammaddesi olarak genellikle poliadipik asit-L,4-b\u00fctandiol se\u00e7ilir.
\nYap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n performans\u0131 \u00fczerinde polyester molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131. Yap\u0131\u015ft\u0131r\u0131c\u0131 \u00f6zelliklerinden yap\u0131lm\u0131\u015f farkl\u0131 polyester yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131 b\u00fcy\u00fck bir etkiye sahiptir, polyesterin molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131 ne kadar y\u00fcksekse, tutkal\u0131n viskozitesi o kadar b\u00fcy\u00fckt\u00fcr, ancak polyester molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131 tutkal performans\u0131n\u0131n penetrasyonu i\u00e7in \u00e7ok y\u00fcksektir ve yap\u0131\u015ft\u0131rma performans\u0131 elveri\u015fsizdir, polyesterin uygun molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131n\u0131n se\u00e7ilmesi yap\u0131\u015ft\u0131rma mukavemetini artt\u0131rmak i\u00e7in gereklidir. Genel olarak, 2000-3000 molek\u00fcler a\u011f\u0131rl\u0131kl\u0131 polyester poliol (poliadipik asit-1,4-b\u00fctandiol i\u00e7in).
\nYap\u0131\u015ft\u0131r\u0131c\u0131 \u00f6zellikleri \u00fczerinde yap\u0131\u015ft\u0131r\u0131c\u0131 molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131. Yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131 yakla\u015f\u0131k 100.000'e ula\u015ft\u0131\u011f\u0131nda, yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n yap\u0131\u015fma mukavemeti en y\u00fcksektir ve 90.000'den d\u00fc\u015f\u00fck oldu\u011funda yap\u0131\u015fma mukavemeti a\u00e7\u0131k\u00e7a azal\u0131r. Molek\u00fcler a\u011f\u0131rl\u0131k 11-130.000 oldu\u011funda, yap\u0131\u015fma mukavemeti \u00e7ok azalmaz, ancak tutkal\u0131n stabilitesi zay\u0131ft\u0131r.
\nYap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131 \u00fczerindeki izosiyanat indeksi ve depolama izosiyanat indeksi R'nin (yani, NCO \/ OH molar oran\u0131) yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131 \u00fczerindeki etkisi, depolama stabilitesi do\u011frudan bir etkiye sahiptir. Cetvel de\u011feri 0,8'den k\u00fc\u00e7\u00fckse, yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131 k\u00fc\u00e7\u00fck bir etkiye sahiptir; 0,85-0,95 aras\u0131ndaki cetvel de\u011feri, yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131 belirli bir etkiye sahiptir; ve 0,95-1,0 aras\u0131ndaki de\u011fer, yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131 daha b\u00fcy\u00fck bir etkiye sahiptir. Yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n depolama stabilitesi a\u00e7\u0131s\u0131ndan, sentetik yap\u0131\u015ft\u0131r\u0131c\u0131, yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n tutkal partik\u00fclleri olsun, iyi depolama stabilitesine sahip olduklar\u0131nda cetvel de\u011feri 0.95'ten azd\u0131r. Yap\u0131\u015ft\u0131r\u0131c\u0131 sentezlendi\u011finde 0,95-1,0 cetvel de\u011feri, tutkal partik\u00fcllerinin depolama stabilitesinden daha y\u00fcksektir.
\nSilikan\u0131n yap\u0131\u015ft\u0131r\u0131c\u0131 \u00f6zellikleri \u00fczerindeki etkisi. Hidroksil poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131da, yap\u0131\u015ft\u0131r\u0131c\u0131 partik\u00fcllerinin \u00e7\u00f6z\u00fcnmesinden sonra, gaz faz\u0131 silikas\u0131n\u0131n 1.6%-2.0%'sini ekleyin, yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n viskozitesi 300-400mPa-s art\u0131r\u0131labilir ve ayr\u0131ca poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n yap\u0131\u015fma mukavemetini ve ilk yap\u0131\u015fmay\u0131 iyile\u015ftirebilir.
\nZincir geni\u015fleticinin tutkal\u0131n performans\u0131 \u00fczerindeki etkisi. Zincir geni\u015fletici eklemek, \u00fcretan baz\u0131n\u0131n i\u00e7eri\u011fini iyile\u015ftirebilir, polimerizasyon g\u00fcc\u00fcn\u00fc, polaritesini ve aktivitesini art\u0131rabilir, b\u00f6ylece poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131, yap\u0131\u015ft\u0131r\u0131lan malzeme ile fiziksel adsorpsiyon ve kimyasal ba\u011f olu\u015fturabilir ve poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131n\u0131n ilk yap\u0131\u015fma mukavemetini ve \u0131s\u0131ya dayan\u0131kl\u0131 \u00f6zelli\u011fini art\u0131rabilir.
\nK\u00fcrleme maddesinin yap\u0131\u015ft\u0131r\u0131c\u0131 performans\u0131 \u00fczerindeki etkisi. K\u00fcrleme maddesi genellikle 3%-10% genel katk\u0131 miktar\u0131 olan JQ-1 ve JQ-4 ve 7900 kullan\u0131r. JQ-l kullan\u0131ld\u0131\u011f\u0131nda, yap\u0131\u015fkan tabaka koyu renklidir ve k\u0131rm\u0131z\u0131 g\u00f6r\u00fcnerek \u00fcst k\u0131sm\u0131 kirletir. 79m kullan\u0131m\u0131 biraz daha iyidir, ancak ayn\u0131 zamanda ideal de\u011fildir JQ-4 tercih edilir.<\/p>","protected":false},"excerpt":{"rendered":"

Poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131lar\u0131n geli\u015fim durumunun analizi Son y\u0131llarda, malzeme geli\u015ftirme seviyesinin h\u0131zl\u0131 bir \u015fekilde iyile\u015ftirilmesiyle, daha g\u00fc\u00e7l\u00fc uygulanabilirli\u011fe sahip \u00e7e\u015fitli yap\u0131\u015ft\u0131r\u0131c\u0131lar birbiri ard\u0131na ortaya \u00e7\u0131km\u0131\u015f ve yap\u0131\u015ft\u0131r\u0131c\u0131 pazar\u0131n\u0131 b\u00fcy\u00fck \u00f6l\u00e7\u00fcde zenginle\u015ftirmi\u015ftir. Poli\u00fcretan yap\u0131\u015ft\u0131r\u0131c\u0131, m\u00fckemmel esneklik, darbe direnci, kimyasal diren\u00e7, a\u015f\u0131nma direnci, [...] ile orta-y\u00fcksek dereceli bir yap\u0131\u015ft\u0131r\u0131c\u0131d\u0131r.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-6989","post","type-post","status-publish","format-standard","hentry","category-catalysts-chemical-auxiliary-agents"],"yoast_head":"\nAnalysis of the development status of polyurethane adhesives - Longchang Chemical<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangchemical.com\/tr\/analysis-of-the-development-status-of-polyurethane-adhesives\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Analysis of the development status of polyurethane adhesives - Longchang Chemical\" \/>\n<meta property=\"og:description\" content=\"Analysis of the development status of polyurethane adhesives In recent years, with the rapid improvement of the level of material development, a variety of adhesives with stronger applicability have come out one after another, greatly enriching the adhesive market. 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