Stress induced lamellar thickening in poly(ethylene succinate)

Stress induced lamellar thickening in poly(ethylene succinate)
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聚(琥珀酸乙烯酯)中应力引起的层状增厚

DOI:
10.1016/j.polymer.2013.10.037
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发表时间:
2013-11
期刊:
影响因子:
4.6
通讯作者:
Dujin Wang
Dujin Wang
中科院分区:
化学2区
文献类型:
--
作者:
Guoming Liu;Liuchun Zheng;Xiuqin Zhang;Chuncheng Li;Dujin Wang

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用同步辐射X射线散射法研究了聚丁二酸乙二醇酯在拉伸变形过程中的结晶结构演变。从α到β的晶体相变在应力加载和卸载时是完全可逆的。在α-β晶化过程中观察到长周期的增加,这归因于非晶层厚度和晶层厚度(片层厚度)的增加。晶化层厚度随β晶体含量的增加而变化,其变化与晶胞内重复长度的差值一致。晶化层厚度和非晶层厚度都是完全可恢复的。提出了一个可能的分子模型来描述晶体转变和片层增厚的机理。
The crystalline structure evolution of poly(ethylene succinate) during tensile deformation was investigated byin-situsynchrotron X-ray scattering. Crystal phase transition fromαtoβform was confirmed to be fully reversible upon stress loading and unloading. An increase of long period was observed during theα–βcrystal transition, which was attributed to the increase of both amorphous layer thickness and crystalline layer thickness (lamellar thickness). The crystalline layer thickness was scaled with the fraction ofβcrystal, and the change of which was in well agreement with the difference in the repeating length along the crystallographiccaxis. Both the crystalline layer thickness and the amorphous layer thickness were fully recoverable. A possible molecular model was proposed to visualize the mechanism for the crystal transition and lamellar thickening.
DOI: 10.1103/physrevlett.91.095502
发表时间: 2003-08-29
影响因子: 8.6
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