Structure Formation from the Oriented Glassy States of Poly(Ethylene Terephthalate)
Structure Formation from the Oriented Glassy States of Poly(Ethylene Terephthalate)
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聚对苯二甲酸乙二醇酯定向玻璃态的结构形成
DOI：
10.1081/mb-120021602
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
Naoki Tsurutani
中科院分区：
文献类型：
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作者：
K. Fukao;A. Koyama;Daisuke Tahara;Y. Kozono;Y. Miyamoto;Naoki Tsurutani
利用同步辐射源的实时 X 射线散射实验研究了等温退火过程中聚对苯二甲酸乙二醇酯 (PET) 从取向玻璃态的有序过程。 001'反射的X射线散射强度是链排列的近晶有序的量度，随着时间的推移而增加，然后在达到最大值后开始减少。小角度 X 射线散射区域中的四点图案的强度是具有倾斜层状结构的类晶体结构的分数的量度，随着时间单调增加。因此，类近晶有序的PET链的分数在等温过程中具有最大值，而类晶体结构的链的分数单调增加。将讨论通过近晶结构从类向列结构到类晶体结构的结构形成动力学。
The ordering process of poly(ethylene terephthalate) (PET) from the oriented glassy states during the isothermal annealing process was investigated using real-time X-ray scattering experiments with synchrotron radiation sources. The X-ray scattering intensity of the 001' reflection, which is a measure of the smectic order with respect to chain alignment, increases with time and then begins to decrease after reaching a maximum. The intensity of the four-point pattern in the small-angle X-ray scattering region, which is a measure of the fraction of a crystal-like structure with a tilted lamellar structure, increases monotonically with time. Hence, the fraction of PET chains with smectic-like order has a maximum during the isothermal process, while that of the crystal-like structure increases monotonically. The kinetics of structure formation from the nematic-like structure to the crystal-like structure by way of the smectic structure will be discussed.
产生生长激素的垂体腺瘤术后照射 18 年后肉瘤转化
DOI：
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发表时间：
2018
期刊：
影响因子：
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作者：
岡田正康;米岡有一郎;大石誠;藤井幸彦
通讯作者：
藤井幸彦