例如 ，对于半结晶聚合物 ，为何只有聚丙烯才有此独特结构 ?此外有关聚丙烯熔体在应?。
There was more c axis orientation crystallization when the melt was treated under high stress. The formation mechanism of such unique structures was also discussed.
结晶度：聚合物可以是晶体状的或非结晶质的，但它们通常是晶体状和非结晶质结构的结合物(半晶体)。
Crystallinity. Polymers can be crystalline or amorphous, but they usually have a combination of crystalline and amorphous structures (semi-crystalline).
结晶度：聚合物可以是晶体状的或非结晶质的，但它们通常是晶体状和非结晶质结构的结合物(半晶体)。
Crystallinity. Polymers can be crystalline or amorphous, but they usually have a combination of crystalline and amorphous structures (semi-crystalline).
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