Epoxigyanta \u00e9s politiol-monomer reakci\u00f3mechanizmusa?<\/p>\n
Az epoxigyant\u00e1k \u00e9s a politiolok k\u00f6z\u00f6tti reakci\u00f3mechanizmus els\u0151sorban a tiolcsoport \u00e9s az epoxicsoport k\u00f6z\u00f6tti k\u00f6lcs\u00f6nhat\u00e1son alapul. A k\u00f6vetkez\u0151 a r\u00e9szletes reakci\u00f3mechanizmus:
\nA reakci\u00f3 beind\u00edt\u00e1sa:<\/p>\n
A politiolok \u00e9s az epoxigyant\u00e1k k\u00f6z\u00f6tti reakci\u00f3 sor\u00e1n a tercier amin megosztatlan elektronp\u00e1rja el\u0151sz\u00f6r a tiolcsoport akt\u00edv hidrog\u00e9nj\u00e9t fogja meg, ami anionos t\u00f6lt\u00e9st eredm\u00e9nyez a k\u00e9natomon.<\/p>\n
<\/p>\n
Nukleofil add\u00edci\u00f3s reakci\u00f3:<\/p>\n
A negat\u00edv t\u00f6lt\u00e9s\u0171 k\u00e9natom reakci\u00f3ba l\u00e9p az epoxigyanta alfa-sz\u00e9natomj\u00e1val egy nukleofil add\u00edci\u00f3s reakci\u00f3nak nevezett folyamat sor\u00e1n.<\/p>\n
Ez a reakci\u00f3 az epoxigyanta h\u00e1rmas epoxicsoportj\u00e1nak megny\u00edl\u00e1s\u00e1t eredm\u00e9nyezi k\u00e9t hidroxilcsoport kialakul\u00e1s\u00e1val.<\/p>\n
<\/p>\n
Tiol-oxig\u00e9n k\u00f6t\u00e9sek j\u00f6nnek l\u00e9tre:<\/p>\n
A tiolcsoportban l\u00e9v\u0151 k\u00e9natom nukleofil add\u00edci\u00f3s reakci\u00f3ban reag\u00e1l az epoxicsoport oxig\u00e9natomj\u00e1val, \u00e9s k\u00e9n-oxig\u00e9n k\u00f6t\u00e9st hoz l\u00e9tre, ami a kem\u00e9nyed\u00e9si folyamat kulcsfontoss\u00e1g\u00fa l\u00e9p\u00e9se.<\/p>\n
<\/p>\n
T\u00e9rh\u00e1l\u00f3s szerkezet kialakul\u00e1sa:<\/p>\n
Az epoxigyant\u00e1ban k\u00e9pz\u0151d\u00f6tt k\u00e9t hidroxilcsoport tov\u00e1bb reag\u00e1l a politiolban l\u00e9v\u0151 merkapt\u00e1ncsoportokkal, hogy t\u00e9rh\u00e1l\u00f3s szerkezetet k\u00e9pezzen.<\/p>\n
Ez a t\u00e9rh\u00e1l\u00f3s szerkezet a politiolt az epoxigyant\u00e1hoz k\u00f6ti.<\/p>\n
<\/p>\n
Gy\u00f3gy\u00edt\u00e1si eredm\u00e9nyek:<\/p>\n
A fenti reakci\u00f3 r\u00e9v\u00e9n a politiol \u00e9s az epoxigyanta egy szil\u00e1rd anyagot alkot, amely ellen\u00e1ll a kop\u00e1snak, a korr\u00f3zi\u00f3nak \u00e9s a magas h\u0151m\u00e9rs\u00e9kletnek.<\/p>\n
<\/p>\n
Reakci\u00f3jellemz\u0151k:<\/p>\n
A poliszulfiddal vulkaniz\u00e1lt epoxi kem\u00e9nyed\u00e9si ideje \u00e1ltal\u00e1ban n\u00e9h\u00e1ny perc \u00e9s n\u00e9h\u00e1ny \u00f3ra k\u00f6z\u00f6tt van, \u00e9s nem ig\u00e9nyel magas h\u0151m\u00e9rs\u00e9kleten vagy nagy nyom\u00e1son t\u00f6rt\u00e9n\u0151 kezel\u00e9st, ami miatt sz\u00e9les k\u00f6rben haszn\u00e1lj\u00e1k az ipari termel\u00e9sben.<\/p>\n
A kikem\u00e9ny\u00edtett anyag kiv\u00e1l\u00f3 fizikai \u00e9s k\u00e9miai tulajdons\u00e1gokkal rendelkezik, mint p\u00e9ld\u00e1ul kop\u00e1s\u00e1ll\u00f3s\u00e1g, korr\u00f3zi\u00f3\u00e1ll\u00f3s\u00e1g, j\u00f3 szigetel\u00e9s \u00e9s egy\u00e9b jellemz\u0151k.<\/p>\n
\u00d6sszefoglalva, az epoxigyanta \u00e9s a politiol reakci\u00f3mechanizmusa egy \u00f6sszetett, de rendk\u00edv\u00fcl hat\u00e9kony folyamat, amely a k\u00e9t anyag szoros k\u00f6t\u00e9s\u00e9t \u00e9s kikem\u00e9nyed\u00e9s\u00e9t nukleofil add\u00edci\u00f3s reakci\u00f3val \u00e9s t\u00e9rh\u00e1l\u00f3s szerkezet kialakul\u00e1s\u00e1val val\u00f3s\u00edtja meg.<\/p>\n
<\/p>\n
Most successful UV formulations are built by choosing the backbone first and then tuning the reactive monomer package around the substrate, cure method, and end-use stress. That usually produces a more stable result than choosing materials by viscosity or price alone.<\/p>\n
Can one UV monomer or resin solve every formulation problem?<\/strong> Why should monomers be screened together with oligomers?<\/strong> <\/p>\n <\/p>\n Quick answer:<\/strong> In practical UV formulation work, resin and monomer selection starts with the end-use property target, then tunes viscosity and cure response around it. Buyers usually shortlist a few matched packages, not a single magic raw material.<\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>","protected":false},"excerpt":{"rendered":" The reaction mechanism between epoxy resins and polythiols mainly involves the interaction between the thiol group and the epoxy group. The following is the detailed reaction mechanism: Reaction initiation: During<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[143],"tags":[],"class_list":["post-7479","post","type-post","status-publish","format-standard","hentry","category-uv-light-curing-series"],"yoast_head":"\n
Usually no. Commercially strong formulas depend on how several components work together to balance cure, adhesion, flow, and durability.<\/p>\n
Because monomers can change viscosity, cure rate, shrinkage, and substrate behavior enough to alter the final ranking of the same backbone resin.<\/p>\nL\u00e9pjen kapcsolatba vel\u00fcnk most!<\/b><\/strong><\/h2>\n
Ha sz\u00fcks\u00e9ge van Price-ra, k\u00e9rj\u00fck, t\u00f6ltse ki el\u00e9rhet\u0151s\u00e9g\u00e9t az al\u00e1bbi \u0171rlapon, \u00e1ltal\u00e1ban 24 \u00f3r\u00e1n bel\u00fcl felvessz\u00fck \u00d6nnel a kapcsolatot. \u00d6n is k\u00fcldhet nekem e-mailt info@longchangchemical.com<\/a><\/span> munkaid\u0151ben ( 8:30-18:00 UTC+8 H.-Szombat ) vagy haszn\u00e1lja a weboldal \u00e9l\u0151 chatj\u00e9t, hogy azonnali v\u00e1laszt kapjon.<\/b><\/strong><\/h4>\n
\n\n\n
\n Politiol\/Polimerkapt\u00e1n<\/strong><\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n DMES monomer<\/a><\/span><\/td>\n Bis(2-merkaptoetil)szulfid<\/td>\n 3570-55-6<\/td>\n<\/tr>\n \n DMPT monomer<\/a><\/span><\/td>\n THIOCURE DMPT<\/td>\n 131538-00-6<\/td>\n<\/tr>\n \n PETMP monomer<\/a><\/span><\/td>\n PENTAERITRITOL-TETRA(3-MERKAPTOPROPION\u00c1T)<\/td>\n 7575-23-7<\/td>\n<\/tr>\n \n PM839 Monomer<\/a><\/span><\/td>\n Polioxi(metil-1,2-et\u00e1ndiil)<\/td>\n 72244-98-5<\/td>\n<\/tr>\n \n Monofunkci\u00f3s monomer<\/strong><\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n HEMA monomer<\/a><\/span><\/td>\n 2-hidroxietil-metakril\u00e1t<\/td>\n 868-77-9<\/td>\n<\/tr>\n \n HPMA monomer<\/a><\/span><\/td>\n 2-hidroxipropil-metakril\u00e1t<\/td>\n 27813-02-1<\/td>\n<\/tr>\n \n THFA monomer<\/a><\/span><\/td>\n Tetrahidrofurfuril-akril\u00e1t<\/td>\n 2399-48-6<\/td>\n<\/tr>\n \n HDCPA monomer<\/a><\/span><\/td>\n Hidrog\u00e9nezett diciklopentenil-akril\u00e1t<\/td>\n 79637-74-4<\/td>\n<\/tr>\n \n DCPMA monomer<\/a><\/span><\/td>\n Dihidrodiciklopentadienil-metakril\u00e1t<\/td>\n 30798-39-1<\/td>\n<\/tr>\n \n DCPA monomer<\/a><\/span><\/td>\n Dihidrodiciklopentadienil-akril\u00e1t<\/td>\n 12542-30-2<\/td>\n<\/tr>\n \n DCPEMA monomer<\/a><\/span><\/td>\n Diciklopenteniloxi-etil-metakril\u00e1t<\/td>\n 68586-19-6<\/td>\n<\/tr>\n \n DCPEOA monomer<\/a><\/span><\/td>\n Diciklopenteniloxi-etil-akril\u00e1t<\/td>\n 65983-31-5<\/td>\n<\/tr>\n \n NP-4EA monomer<\/a><\/span><\/td>\n (4) etoxil\u00e1lt nonylfenol<\/td>\n 50974-47-5<\/td>\n<\/tr>\n \n LA Monomer<\/td>\n Lauril-akril\u00e1t \/ dodecil-akril\u00e1t<\/td>\n 2156-97-0<\/td>\n<\/tr>\n \n THFMA monomer<\/a><\/span><\/td>\n Tetrahidrofurfuril-metakril\u00e1t<\/td>\n 2455-24-5<\/td>\n<\/tr>\n \n PHEA monomer<\/span><\/a><\/td>\n 2-FENOXI-ETIL-AKRIL\u00c1T<\/td>\n 48145-04-6<\/td>\n<\/tr>\n \n LMA monomer<\/a><\/span><\/td>\n Lauril-metakril\u00e1t<\/td>\n 142-90-5<\/td>\n<\/tr>\n \n IDA monomer<\/a><\/span><\/td>\n Izodecil-akril\u00e1t<\/td>\n 1330-61-6<\/td>\n<\/tr>\n \n IBOMA monomer<\/a><\/span><\/td>\n Izobornyl-metakril\u00e1t<\/td>\n 7534-94-3<\/td>\n<\/tr>\n \n IBOA monomer<\/a><\/span><\/td>\n Izobornyil-akril\u00e1t<\/td>\n 5888-33-5<\/td>\n<\/tr>\n \n EOEOEA Monomer<\/a><\/span><\/td>\n 2-(2-etoxietoxi-etoxi)etil-akril\u00e1t<\/td>\n 7328-17-8<\/td>\n<\/tr>\n \n Multifunkcion\u00e1lis monomer<\/strong><\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n DPHA monomer<\/a><\/span><\/td>\n Dipentaeritritol-hexakril\u00e1t<\/td>\n 29570-58-9<\/td>\n<\/tr>\n \n DI-TMPTA monomer<\/a><\/span><\/td>\n DI(TRIMETILOLPROPAN)TETRAAKRIL\u00c1T<\/td>\n 94108-97-1<\/td>\n<\/tr>\n \n Akrilamid-monomer<\/strong><\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n ACMO monomer<\/a><\/span><\/td>\n 4-akrilil-morfolin<\/td>\n 5117-12-4<\/td>\n<\/tr>\n \n Difunkci\u00f3s monomer<\/strong><\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n PEGDMA monomer<\/a><\/span><\/td>\n Poli(etil\u00e9nglikol)-dimetakril\u00e1t<\/td>\n 25852-47-5<\/td>\n<\/tr>\n \n TPGDA monomer<\/a><\/span><\/td>\n Tripropil\u00e9n-glikol-diacril\u00e1t<\/td>\n 42978-66-5<\/td>\n<\/tr>\n \n TEGDMA monomer<\/a><\/span><\/td>\n Trietil\u00e9nglikol-dimetakril\u00e1t<\/td>\n 109-16-0<\/td>\n<\/tr>\n \n PO2-NPGDA monomer<\/span><\/a><\/td>\n Propoxil\u00e1t neopentylenglikol-diacril\u00e1t<\/td>\n 84170-74-1<\/td>\n<\/tr>\n \n PEGDA monomer<\/a><\/span><\/td>\n Polietil\u00e9n-glikol-diacril\u00e1t<\/td>\n 26570-48-9<\/td>\n<\/tr>\n \n PDDA monomer<\/a><\/span><\/td>\n Ftal\u00e1t dietil\u00e9nglikol-diacril\u00e1t<\/td>\n <\/td>\n<\/tr>\n \n NPGDA monomer<\/a><\/span><\/td>\n Neopentil-glikol-diacril\u00e1t<\/td>\n 2223-82-7<\/td>\n<\/tr>\n \n HDDA monomer<\/a><\/span><\/td>\n Hexametil\u00e9n-diacril\u00e1t<\/td>\n 13048-33-4<\/td>\n<\/tr>\n \n EO4-BPADA monomer<\/span><\/a><\/td>\n ETOXIL\u00c1LT (4) BISZFENOL A-DIACRIL\u00c1T<\/td>\n 64401-02-1<\/td>\n<\/tr>\n \n EO10-BPADA Monomer<\/a><\/span><\/td>\n ETOXIL\u00c1LT (10) BISZFENOL A-DIACRIL\u00c1T<\/td>\n 64401-02-1<\/td>\n<\/tr>\n \n EGDMA monomer<\/a><\/span><\/td>\n Etil\u00e9nglikol-dimetakril\u00e1t<\/td>\n 97-90-5<\/td>\n<\/tr>\n \n DPGDA monomer<\/a><\/span><\/td>\n Dipropil\u00e9n-glikol-dieno\u00e1t<\/td>\n 57472-68-1<\/td>\n<\/tr>\n \n Bis-GMA monomer<\/a><\/span><\/td>\n Biszfenol A glicidil-metakril\u00e1t<\/td>\n 1565-94-2<\/td>\n<\/tr>\n \n Trifunkcion\u00e1lis monomer<\/strong><\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n TMPTMA monomer<\/a><\/span><\/td>\n Trimetilolpropan-trimetakril\u00e1t<\/td>\n 3290-92-4<\/td>\n<\/tr>\n \n TMPTA monomer<\/a><\/span><\/td>\n Trimetilolpropan-trikril\u00e1t<\/td>\n 15625-89-5<\/td>\n<\/tr>\n \n PETA monomer<\/a><\/span><\/td>\n Pentaeritritol-trikril\u00e1t<\/td>\n 3524-68-3<\/td>\n<\/tr>\n \n GPTA ( G3POTA ) Monomer<\/a><\/span><\/td>\n GLICERIL-PROPOXI-TRIAKRIL\u00c1T<\/td>\n 52408-84-1<\/td>\n<\/tr>\n \n EO3-TMPTA monomer<\/a><\/span><\/td>\n Etoxil\u00e1lt trimetilolpropan-trikril\u00e1t<\/td>\n 28961-43-5<\/td>\n<\/tr>\n \n Fotoreziszt monomer<\/strong><\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n IPAMA monomer<\/a><\/span><\/td>\n 2-izopropil-2-adamantil-metakril\u00e1t<\/td>\n 297156-50-4<\/td>\n<\/tr>\n \n ECPMA monomer<\/a><\/span><\/td>\n 1-etil-ciklopentil-metakril\u00e1t<\/td>\n 266308-58-1<\/td>\n<\/tr>\n \n ADAMA monomer<\/a><\/span><\/td>\n 1-Adamantil-metakril\u00e1t<\/td>\n 16887-36-8<\/td>\n<\/tr>\n \n Metakril\u00e1t monomer<\/strong><\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n TBAEMA monomer<\/a><\/span><\/td>\n 2-(terc-butilamino)etil-metakril\u00e1t<\/td>\n 3775-90-4<\/td>\n<\/tr>\n \n NBMA monomer<\/a><\/span><\/td>\n n-butil-metakril\u00e1t<\/td>\n 97-88-1<\/td>\n<\/tr>\n \n MEMA monomer<\/a><\/span><\/td>\n 2-metoxietil-metakril\u00e1t<\/td>\n 6976-93-8<\/td>\n<\/tr>\n \n i-BMA monomer<\/a><\/span><\/td>\n Izobutil-metakril\u00e1t<\/td>\n 97-86-9<\/td>\n<\/tr>\n \n EHMA monomer<\/a><\/span><\/td>\n 2-etilhexil-metakril\u00e1t<\/td>\n 688-84-6<\/td>\n<\/tr>\n \n EGDMP monomer<\/a><\/span><\/td>\n Etil\u00e9nglikol bisz(3-merkaptopropion\u00e1t)<\/td>\n 22504-50-3<\/td>\n<\/tr>\n \n EEMA monomer<\/a><\/span><\/td>\n 2-etoxietil-2-metilprop-2-eno\u00e1t<\/td>\n 2370-63-0<\/td>\n<\/tr>\n \n DMAEMA monomer<\/a><\/span><\/td>\n N,M-dimetil-aminoetil-metakril\u00e1t<\/td>\n 2867-47-2<\/td>\n<\/tr>\n \n DEAM monomer<\/a><\/span><\/td>\n Dietilaminoetil-metakril\u00e1t<\/td>\n 105-16-8<\/td>\n<\/tr>\n \n CHMA monomer<\/a><\/span><\/td>\n Ciklohexil-metakril\u00e1t<\/td>\n 101-43-9<\/td>\n<\/tr>\n \n BZMA monomer<\/a><\/span><\/td>\n Benzil-metakril\u00e1t<\/td>\n 2495-37-6<\/td>\n<\/tr>\n \n BDDMP monomer<\/a><\/span><\/td>\n 1,4-But\u00e1ndiol Di(3-merkaptopropion\u00e1t)<\/td>\n 92140-97-1<\/td>\n<\/tr>\n \n BDDMA monomer<\/a><\/span><\/td>\n 1,4-but\u00e1ndioldi-oldimetakril\u00e1t<\/td>\n 2082-81-7<\/td>\n<\/tr>\n \n AMA monomer<\/a><\/span><\/td>\n Alil-metakril\u00e1t<\/td>\n 96-05-9<\/td>\n<\/tr>\n \n AAEM monomer<\/a><\/span><\/td>\n Acetilacetoxi-etil-metakril\u00e1t<\/td>\n 21282-97-3<\/td>\n<\/tr>\n \n Akril\u00e1t monomer<\/strong><\/td>\n <\/td>\n<\/tr>\n \n IBA monomer<\/a><\/span><\/td>\n Izobutil-akril\u00e1t<\/td>\n 106-63-8<\/td>\n<\/tr>\n \n EMA monomer<\/a><\/span><\/td>\n Etil-metakril\u00e1t<\/td>\n 97-63-2<\/td>\n<\/tr>\n \n DMAEA monomer<\/a><\/span><\/td>\n Dimetil-aminoetil-akril\u00e1t<\/td>\n 2439-35-2<\/td>\n<\/tr>\n \n DEAEA monomer<\/a><\/span><\/td>\n 2-(dietilamino)etil-prop-2-eno\u00e1t<\/td>\n 2426-54-2<\/td>\n<\/tr>\n \n CHA monomer<\/a><\/span><\/td>\n ciklohexil prop-2-eno\u00e1t<\/td>\n 3066-71-5<\/td>\n<\/tr>\n \n BZA monomer<\/a><\/span><\/td>\n benzil-prop-2-eno\u00e1t<\/td>\n 2495-35-4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n