内塑化和外塑化有什么区别,它们的塑化原理是什么?
Quick answer: UV monomers and oligomers are usually chosen by viscosity, adhesion, flexibility, shrinkage, and cure speed as a package. The most reliable formulas come from balancing those properties rather than maximizing only one.
塑料制品的生产离不开增塑剂的使用,因为仅使用PVC树脂生产塑料零件的成本太高,而在生产过程中往往需要获得各种不同性能的增塑剂,而掺入不同的增塑剂就可以达到这种 "降本增益 "的目的,但在增塑剂的实际使用中,根据增塑的形式分为内增塑和外增塑两种情况,在这里傲世小编为大家整理了内增塑和外增塑的区别及其增塑原理,供大家参考。
一、内塑化与外塑化的区别
1、内部塑化
内增塑是一种化学增塑方法,由于第二单体与聚合物链段有稳定的化学结合,所以不会被介质抽出,但从工艺和成本上考虑,内增塑剂内聚力较弱,使用温度较窄,且必须在聚合过程中加入,所以通常只用于稍有挠性的塑料制品。
PVC 环保外增塑剂
2、外用增塑剂
外增塑是一种物理增塑方法,性能比较全面,生产使用方便,应用范围广,但易迁移易挥发易损耗。常用的外增塑剂大多是酯类有机化合物,通常不与聚合物发生化学反应,在高温下与聚合物的作用主要是溶胀,然后与聚合物形成固溶体。增塑剂通常被称为外增塑剂。
第二,内塑化和外塑化原理
1、内部塑化原理
增塑是指在聚合过程中引入一种单体的第二单体,由于第二单体共聚于聚合物的分子结构中,破坏了聚合物分子链的规整程度,从而降低了聚合物的结晶度,减小了分子间作用力,增加了可塑性。如嵌段共聚、接枝共聚等方法。
另一种内部塑化是在聚合物分子链中引入支链(或取代基或接枝),支链可以降低聚合物链与链之间的作用力,从而提高塑料零件的可塑性。
对苯型环保增塑剂
2、外塑化原理
外塑化是借助某些具有溶解能力的低分子物质,混入树脂分子中,增大分子间的距离,以减小树脂的分子间引力,相当于用机械方法强制,分散在需要塑化的聚合物中,一般不与聚合物发生反应,不成为聚合物链段的一部分。外部塑化的结果是降低分子间引力,使塑化后的树脂变得柔软,降低树脂的加工温度。
同系列的阻燃增塑剂
| Lcflex® T-50 | T-50; ASE | 化学文摘社编号 91082-17-6 |
| Lcflex® ATBC | 柠檬酸乙酰三丁酯 | 化学文摘社编号 77-90-7 |
| Lcflex® TBC | 柠檬酸三丁酯 | 化学文摘社编号 77-94-1 |
| Lcflex® TCPP | TCPP 阻燃剂 | 化学文摘社编号 13674-84-5 |
| Lcflex® DOTP | 对苯二甲酸二辛酯 | 化学文摘社编号 6422-86-2 |
| Lcflex® DEP | 邻苯二甲酸二乙酯 | 化学文摘社编号 84-66-2 |
| Lcflex® TEC | 柠檬酸三乙酯 | 化学文摘社编号 77-93-0 |
| Lcflex® DOA | 己二酸二辛酯 | 化学文摘社编号 123-79-5 |
| Lcflex® DOS | 癸二酸二正辛酯 | 化学文摘社编号 2432-87-3 |
| Lcflex® DINP | 邻苯二甲酸二异壬酯 | CAS 28553-12-0/685 15-48-0 |
| Lcflex® TMP | 三羟甲基丙烷 | 化学文摘社编号 77-99-6 |
| Lcflex® TEP | 磷酸三乙酯 | 化学文摘社编号 78-40-0 |
| Lcflex® TOTM | 偏苯三酸三辛酯 | CAS 3319-31-1 |
| Lcflex® BBP | 生物基增塑剂、高效增塑剂 | |
| Lcflex® TMP | 三羟甲基丙烷 | 化学文摘社编号 77-99-6 |
| Lcflare® TCEP | 磷酸三(2-氯乙基)酯 | 化学文摘社编号 115-96-8 |
| Lcflare® BDP | 双酚 A 双(磷酸二苯酯) | 化学文摘社编号 5945-33-5 |
| Lcflare® TPP | 磷酸三苯酯 | 化学文摘社编号 115-86-6 |
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How buyers usually evaluate UV monomers and resin systems
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.
- Start from the final property target: hardness, flexibility, adhesion, and shrinkage rarely point to exactly the same raw-material package.
- Screen the reactive package as a whole: oligomer, monomer, and photoinitiator choices interact strongly in UV systems.
- Use viscosity as a tool, not the only decision rule: the easiest-processing material is not always the one that performs best after cure.
- Check the real substrate: plastic, metal, label film, gel systems, and coatings can reward very different polarity and cure-density balances.
Recommended product references
- CHLUMIFLEX ATBC: A practical non-phthalate plasticizer reference for application and compliance screens.
- CHLUMIFLEX DOTP: A standard terephthalate-plasticizer benchmark in flexible-plastics applications.
- CHLUMIFLEX DBP: A conventional plasticizer comparison point in broader plasticizer discussions.
- CHLUMICRYL IBOA: A strong low-viscosity monomer reference when hardness and good flow both matter.
FAQ for buyers and formulators
Can one UV monomer or resin solve every formulation problem?
Usually no. Commercially strong formulas depend on how several components work together to balance cure, adhesion, flow, and durability.
Why should monomers be screened together with oligomers?
Because monomers can change viscosity, cure rate, shrinkage, and substrate behavior enough to alter the final ranking of the same backbone resin.