什么是合成树脂

合成树脂是工业生产的树脂，通常是通过固化过程转化为刚性聚合物的粘性物质。为了进行固化，树脂通常含有反应性端基，如丙烯酸盐或环氧化合物。有些合成树脂的性能与天然植物树脂相似，但许多合成树脂却没有。

合成树脂有几类。一些是通过有机化合物的酯化制造的。一些是热固性塑料，其中术语“树脂”松散地施加到反应物或产物上，或两者。 “树脂”可以应用于共聚物中的两种单体之一，另一种称为“硬化剂”，如在环氧树脂中。 对于仅需要一种单体的热固性塑料，单体化合物是“树脂”。 例如，液态甲基丙烯酸甲酯在液态时通常称为“树脂”或“浇铸树脂”，在其聚合和“凝固”之前。 设定后，生成的PMMA通常更名为丙烯酸玻璃，或“丙烯酸”。 （这是与有机玻璃和Lucite相同的材料）。

原文：

Synthetic resins are of several classes. Some are manufactured by esterification of organic compounds. Some are thermosetting plastics in which the term "resin" is loosely applied to the reactant or product, or both. "Resin" may be applied to one of two monomers in a copolymer, the other being called a "hardener", as in epoxy resins. For thermosetting plastics that require only one monomer, the monomer compound is the "resin". For example, liquid methyl methacrylate is often called the "resin" or "casting resin" while in the liquid state, before it polymerizes and "sets". After setting, the resulting PMMA is often renamed acrylic glass, or "acrylic". (This is the same material called Plexiglas and Lucite).

Synthetic resins are industrially produced resins, typically viscous substances that convert into rigid polymers by the process of curing. In order to undergo curing, resins typically contain reactive end groups, such as acrylates or epoxides. Some synthetic resins have properties similar to natural plant resins, but many do not.

来源：wikipedia

来自百度百科对“合成树脂”的介绍

合成树脂是由人工合成的一类高分子聚合物。合成树脂最重要的应用是制造塑料。为便于加工和改善性能，常添加助剂，有时也直接用于加工成形，故常是塑料的同义语。合成树脂还是制造合成纤维、涂料、胶粘剂、绝缘材料等的基础原料。合成树脂种类繁多，其中聚乙烯（PE）、聚氯乙烯（PVC）、聚苯乙烯（PS）、聚丙烯（PP）和ABS树脂为五大通用树脂，是应用最为广泛的合成树脂材料。

来源：百度百科