好吧问答库 > 结晶度的影响结晶的因素

结晶度的影响结晶的因素

2025年04月08日 03:21
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高分子链结构
对称性好、无支链或支链很少或侧基体积小的、大分子间作用力大的高分子容易相互靠紧，容易发生结晶。
温度
高分子从无序的卷团移动到正在生长的晶体的表面，模温较高时提高了高分子的活动性从而加快了结晶。
压力
在冷却过程中如果有外力作用，也能促进聚合物的结晶，故生产中可调高射出压力和保压压力来控制结晶性塑料的结晶度。
形核剂
由于低温有利于快速形核，但却减慢了晶粒的成长，因此为了消除这一矛盾，在成型材料中加入形核剂，这样使得塑料能在高模温下快速结晶。

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