Differential melting in compacted high-modulus melt-spun polyethylene fibres
Differential melting in compacted high-modulus melt-spun polyethylene fibres
复制标题
压实高模量熔纺聚乙烯纤维的差异熔融
DOI：
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发表时间：
1995
影响因子：
4.5
通讯作者：
I. Ward
中科院分区：
文献类型：
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作者：
M. Kabeel;D. Bassett;R. Olley;P. Hine;I. Ward
研究了高模量熔融纺丝聚乙烯纤维在超过最佳压实温度时的压实性能。经过这样的处理后，由于不同的熔化，试样容易变得不均匀。观察到单个压实纤维不仅从外部向内熔化，而且在某些内部区域也熔化，这取决于局部自由体积的可用性。已经确定了不同稳定性的区域，并得出了有关初始纤维结构的推论。特别指出的是，缺陷密度的纵向区域（在横截面上表现出凹坑，在周围环境之前融化）是在纤维内部的刚性框架内发生的初始结晶的结果，可能是在应变的分子网络上成核。残余纤维周围带状再结晶的存在表明，这种现象是通过相邻片层在生长过程中相互作用而形成的。
The compaction of high-modulus melt-spun polyethylene fibres has been investigated for compaction temperatures above the optimum. After such treatment the specimens are liable to be non-uniform because of differential melting. Individual compacted fibres are observed to melt not only from the outside inwards, but also in certain internal regions, depending upon the availability of local free volume. The regions of different stability have been identified and inferences drawn concerning the structure of the initial fibres. It is suggested in particular that the longitudinal regions of deficit density (which exhibit cratering in transverse sections and melt before their surroundings) are a result of initial crystallization occurring within a rigid framework inside the fibre, possibly nucleated on a strained molecular network. The presence of banded recrystallization around residual fibres demonstrates that this phenomenon develops via interaction of neighbouring lamellae as they grow.