STUDIES ON THE TEMPERATURE-DEPENDENCE OF THE ELASTIC-MODULUS OF THE CRYSTALLINE REGIONS OF POLYMERS .15. TEMPERATURE-DEPENDENCE OF THE ELASTIC-MODULUS OF THE CRYSTALLINE REGIONS OF POLY(ETHYLENE 2,6-NAPHTHALATE)

被引：32
|
作者：
NAKAMAE, K
NISHINO, T
GOTOH, Y
机构：
[1] Department of Chemical Science and Engineering, Faculty of Engineering, Kobe University, Kobe, 657, Rokko, Nada
来源：
POLYMER | 1995年 / 36卷 / 07期
关键词：
POLY(ETHYLENE 2,6-NAPHTHALATE); ELASTIC MODULUS; SKELETAL STRUCTURE;
D O I：
10.1016/0032-3861(95)95917-P
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The temperature dependence of the elastic modulus E1 of the crystalline regions of poly(ethylene 2,6-naphthalate) (PEN-2,6) in the direction parallel to the chain axis has been investigated up to 228-degrees-C by X-ray diffraction. The E1 value of PEN-2,6 was 145 GPa at room temperature, which is about 40% greater than that of poly(ethylene terephthalate) (E1 = 108 GPa). The axial chain contraction coefficient was constant from 22 to 228-degrees-C, and correspondingly the value of E1 remained unchanged up to 228-degrees-C. The deformation mechanism is considered to remain unchanged up to 228-degrees-C and the skeletal conformation of PEN-2,6 in the crystalline regions is stable against heat. It is reasonable to conclude that stress is homogeneous throughout the sample.
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页码：1401 / 1405
页数：5
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