Effect of Crystallization on Dynamic Viscoelasticity for Polybutene-1
Effect of Crystallization on Dynamic Viscoelasticity for Polybutene-1
复制标题
结晶对聚丁烯-1 动态粘弹性的影响
DOI：
10.2472/jsms.46.187
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
T. Masuda
中科院分区：
文献类型：
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作者：
H. Kashihara;Masaoki Takahashi;T. Takigawa;T. Masuda
研究了聚丁烯-1在90.9 ~ 97.3°C等温结晶过程中的动态粘弹性。晶化显著提高了材料的储能模量和损耗模量。讨论了用动态测量（xG）定义的结晶度（Gt-G 0）/（G∞-G 0）。在相同的晶化温度（Tc）下，由G'和G“测得的xG曲线一致。xG曲线不依赖于测量的频率。不同Tc下的xG曲线可以通过水平位移叠加。位移因子与通过DSC获得的数据相同。通过比较粘弹测量获得的数据，发现动态测量的结晶度在短时间内增加得更快。
Dynamic viscoelasticity during isothermal crystallization for polybutene-1 was investigated at temperatures between 90.9 and 97.3°C. Crystallization increased storage and loss moduli intensively. The crystallinity defined by dynamic measurements (xG) as (Gt-G0)/(G∞-G0) was discussed. At the same crystallizing temperature (Tc), the xG curves determined from G' coincided with those from G". The xG curves did not depend on the measured frequencies. The xG curves at different Tc could be superposed by horizontal shifts. The shift factors were the same as those for the data obtained by DSC. By comparing the data obtained by the viscoelastic measurements, it was found that the crystallinity from dynamic measurements increases more rapidly in short time.