MEMORY EFFECTS IN ISOTHERMAL CRYSTALLIZATION .2. ISOTACTIC POLYPROPYLENE
MEMORY EFFECTS IN ISOTHERMAL CRYSTALLIZATION .2. ISOTACTIC POLYPROPYLENE
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DOI：
10.1007/bf00652344
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发表时间：
1995-04-01
影响因子：
2.4
通讯作者：
ZIABICKI, A
中科院分区：
文献类型：
--
作者：
ALFONSO, GC;ZIABICKI, A
采用差示扫描量热法（DSC）研究了熔融温度和熔融时间对等规聚丙烯等温结晶速率的影响。结晶速率随熔融温度和熔融时间的增加而降低。在本文作者[1]建立的瞬态等温结晶理论模型的框架内对结果进行了讨论。结果表明，作为所观察到的效果的主要机制的活化能E（a）= 89 +/- 7 kJ/mole的预定核的逐渐破坏。
The effects of temperature and duration of melting on the rate of isothermal crystallization of isotactic polypropylene were investigated by differential scanning calorimetry (DSC). Crystallization rates were found to decrease with increasing melt temperature and melting time. The results were discussed in the framework of the theoretical model of transient isothermal crystallization developed by the present authors [1]. The results suggest gradual destruction of predetermined nuclei with activation energy E(a) = 89 +/- 7 kJ/mole as a main mechanism of the observed effects.