高相对分子质量聚乙烯的增塑熔纺，由于聚合物浓度较高，大分子缠结多，纤维超拉伸比较困难，难以达到高强度。
Plasticized melt - spun HMWPE fiber is hard to draw to high strength because of high HMWPE content and more molecular tangle in as-spun fibers.
触变性和反触变性是由大分子天生缠结与非天生缠结机理所致；
The results showed that PAN/DMSO solution showed anti-thixotropy lower than thixotropy, which resulted from the mechanism of inborn and uninborn entanglements.
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