EFFECTS OF WATER-ABSORPTION ON PHYSICAL-PROPERTIES AND DEGREE OF MOLECULAR-ORIENTATION OF POLY(ETHYLENE-TEREPHTHALATE)
EFFECTS OF WATER-ABSORPTION ON PHYSICAL-PROPERTIES AND DEGREE OF MOLECULAR-ORIENTATION OF POLY(ETHYLENE-TEREPHTHALATE)
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DOI：
10.1002/pen.760260907
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发表时间：
1986-05-01
影响因子：
3.2
通讯作者：
LOFGREN, EA
中科院分区：
文献类型：
--
作者：
JABARIN, SA;LOFGREN, EA
已知聚对苯二甲酸乙二醇酯（PET）是一种吸湿性热塑性塑料，其以快速的速率从其环境中吸收水分。本文报道了PET的吸水特性与相对湿度、暴露时间、温度、厚度和分子量的关系。结果表明，吸湿对PET的物理性能有显著的影响，导致PET的玻璃化转变温度、结晶温度和分子取向度大幅度下降。
Poly(ethylene terephthalate) (PET) is known to be a hygroscopic thermoplastic, which absorbs moisture from its environment at a rapid rate. The water absorption characteristics of PET as a function of relative humidity, exposure time, temperature, thickness, and molecular weight are reported here. Results indicate that absorbed moisture has significant influences on the physical properties of PET, leading to large decreases in the glass transition temperature, crystallization temperature, and degree of molecular orientation.