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材料科学

材料特性

橡胶的硫化/交联反应

作者:小编2021-09-08 17:13:47

RUBBER VULCANIZATION/CROSSLINKING REACTION 

橡胶的硫化/交联反应

橡胶的硫化/交联反应(图1)

硫化/交联反应是橡胶分子由县性结构转变三维三维结构的化学转变

The vulcanization/crosslinking reaction is a chemical transformation of rubber molecules from a linear structure to a three-dimensional network structure

这种结构的转变引起物理机械性能和化学稳定性的重大变化,使橡胶具有广泛的应用价值

This structural change make major changes in physical ,mechanical properties and chemical stability, making rubber have a wide range of applications

实现硫化/交联反应有三种方式

There are three ways to achieve the vulcanization/crosslinking reaction

1.硫化剂/交联剂参与的反应

Vulcanizing agent /crosslinking agent reaction

硫磺,其同系物,或以树酯,胺类化合物等有机化合物为交联剂

Sulfur, its homologues, or organic compounds such as resins and amines

2.自由基引发剂引发的反应

Reaction initiated by free radical

过氧化物交联和辐射交联

Peroxide cross-linking and radiation cross-linking

3.利用活性基团间的反应

Use reactions between polar groups

用金属氧化物交联

Crosslink with metal oxides

有时为了提高交联效率或调节交联反应速率又可以应用催化剂或交联助剂等

橡胶的交联反应是非常复杂的化学反应

Sometimes in order to improve the Vulcanizing/cross-linking efficiency or adjust the vulcanizing/cross-linking reaction rate, catalysts or cross-linking aids can also be used

The vulcanizing/cross-linking reaction of rubber is a very complicated chemical reaction