With the increasing of temperature, the microfibril which had caused by the weak force of macromolecule remained no more, but the fine cervical and microporous part appeared.

• 随着温度的升高，纤维在断裂处不再出现因大分子之间作用力损失而产生的微原纤现象，在拉伸断裂处出现了细颈和微孔。