Structure development in the early stages of crystallization during melt spinning
Structure development in the early stages of crystallization during melt spinning
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DOI：
10.1016/s0032-3861(01)00760-1
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发表时间：
2001-03
期刊：
影响因子：
4.6
通讯作者：
Joshua M. Samon;J. Schultz;B. Hsiao
中科院分区：
文献类型：
--
作者：
Joshua M. Samon;J. Schultz;B. Hsiao
研究了四种聚合物：HDPE、PVDF、尼龙6和聚甲醛在熔融纺丝过程中的最早结晶阶段。这四种聚合物的熔体粘度非常相似。特别令人感兴趣的是可检测结晶开始的时间与卷取速度的关系。这四种聚合物的结果都建立在相同的起始时间-卷取速度曲线上，这表明这一条件主要取决于链的取向，而不是链的化学成分或比过冷度。计算结果与临界应变水平条件相一致。对于纺锤线的进一步结晶，也发现了类似的结果，但不那么严格。
The earliest stage of crystallization during melt spinning was examined for four polymers: HDPE, PVDF, nylon 6 and poly(oxymethylene). The four polymers have very similar melt viscosities. Of particular interest is the dependence of the time for the onset of detectable crystallization on the take-up speed. The results for all four polymers lie on the same onset time versus take-up speed curve, indicating that this condition depends chiefly upon chain orientation and not appreciably on chain chemistry or specific undercooling. The result is consistent with a condition of critical strain level. A similar, but less stringent, result is found for further crystallization in the spinline.