当前位置：在线题库搜索＞[单选题]按照树脂的分子结构及其特性分为热塑性塑料和热固性塑料，热固性塑料是（）。的答案是什么？
问题：
[单选题]按照树脂的分子结构及其特性分为热塑性塑料和热固性塑料，热固性塑料是（）。
A、树脂是线型或带支链型结构；具有可塑性，热变形过程可逆；成型过程只有物理变化
B、体型网状结构；一经成型后，不再具有可逆性；成型过程既有物理变化也有化学变化
C、线型或带支链型结构；一经成型后，不再具有可逆性，生产废料不能回收
D、体型网状结构；具有可塑性，其变形过程是可逆的；成型过程只有物理变化
参考答案：
B
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