Structural order in heat treated vinyl chloride polymers
Structural order in heat treated vinyl chloride polymers
复制标题
热处理氯乙烯聚合物的结构顺序
DOI：
10.1016/0032-3861(76)90152-x
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发表时间：
1976
期刊：
影响因子：
4.6
通讯作者：
M. Gilbert
中科院分区：
文献类型：
--
作者：
A. Gray;M. Gilbert
将三种氯乙烯聚合物在40~160℃温度范围内进行0.5~5h的热处理，通过密度测量、差热分析和X射线衍射仪研究了聚合物的结构变化。结果表明，三种聚合物的原始结晶度不同。完全去除这种结晶度的尝试没有成功；可以通过高于Tg的退火引入进一步的结晶度。Tg以下的退火引起的变化不是由于结晶所致。对聚氯乙烯(PVC)结晶度的测定方法进行了评价。
Three vinyl chloride polymers were annealed at temperatures in the range 40–160°C for times varying from 0.5 to 5 h. Structural changes occurring in the polymers were examined by density measurement, differential thermal analysis and X-ray diffraction. It was shown that the three polymers varied in their original crystallinity. Attempts to totally remove this crystallinity, were unsuccessful; further crystallinity could be introduced by annealing aboveTgChanges induced by annealing belowTgwere not due to crystallization. Methods used to measure crystallinity in poly(vinyl chloride) (PVC) were assessed.