Microporous polypropylene hollow fibrous membranes may be prepared by the melt spinning and cold stretching (MSCS) or thermally induced phase separation (TIPS) method.
对熔融纺丝-冷却拉伸与热致相分离两种制备微孔聚丙烯中空纤维膜的意义、原理、过程、影响因素等进行了评述。
It is shown that the relative concentration of melt structure unit varies abruptly in some extent across the phase border.
熔体结构单元相对含量，在相界线两侧有某种程度的突变。
Crystalline resins have a very sharp melting point and require significant energy (heat) input before they undergo a phase change and melt to a low viscosity.
结晶型树脂有很尖锐的熔点，要求大量的热能才能进行相转变并熔融到一种低粘状态。
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