Birefringence of amorphous polymers. 4. Large deformation of polystyrene near its glass transition temperature
Birefringence of amorphous polymers. 4. Large deformation of polystyrene near its glass transition temperature
复制标题
无定形聚合物的双折射。
DOI：
10.1021/ma00039a016
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
K. Osaki
中科院分区：
文献类型：
--
作者：
H. Okamoto;Tadashi Inoue;K. Osaki
在98 ° C下，测量了聚苯乙烯在大变形下，瞬时伸长（0.6 ~ 2%）和恒速伸长（初始伸长速率=5.5×10 - 42 ×10 - 3s-1）过程中的应力f和双折射Δn。应力-光学规则是无效的。根据修正的应力光学规则分析数据，其中f和Δn中的每一个被假定为两项之和，并且应力光学规则被假定为对每组组分分别有效：f= fR + fG和Δn= CRfR + CGfG其中Cg和CR是材料常数
The stress, f, and the birefringence, Δn, were measured for polystyrene at 98 o C under large deformations; after an instantaneous elongation (0.6-2%) and during an elongation at constant speed (initial rate of elongation=5.5×10 -4 2×10 -3 s -1 ). The stress-optical rule was not valid. The data were analyzed in terms of the modified stress-optical rule, in which each of f and Δn was assumed to be a sum of two terms and the stress-optical rule was assumed valid separately for each set of components: f=f R +f G and Δn=C R f R +C G f G where C g and C R are material constants