Relation between high-pressure hydrogen resistance and morphology on blends of nylon 6-66 and ethylene vinyl alcohol copolymer with 1,2-diol side chains

被引：0
作者：
Shibutani M. [1 ]
Tokumitsu K. [2 ]
Takeshita H. [2 ]
Sumino S. [2 ]
Nishimura S. [3 ]
Fujiwara H. [3 ]
机构：
[1] Central Research Laboratory, Research and Development Division, Nippon Synthetic Chemical Industry Co.,Ltd, Muroyama,Ibaraki
[2] Department of Materials and Science, School of Engineering, University of Shiga Pref., Hasaka-cho, Hikone
[3] Research Center for Hydrogen Industrial Use and Storage, Kyushu University, Nishi-ku,Fkuoka
来源：
Zairyo/Journal of the Society of Materials Science, Japan | 2019年 / 68卷 / 01期
关键词：
!sup]13[!/sup] C spin-lattice relaxation time; Ethylene vinyl alcohol copolymer; Free volume; High-pressure hydrogen gas; Hydrogen resistance; Nylon; 6-66; Polymer alloy;
D O I：
10.2472/jsms.68.34
中图分类号：
学科分类号：
摘要：
We developed an ethylene vinyl alcohol copolymer with 1,2 diol side chains (hereinafter new EVOH) that can be melt-molded even though the ethylene content is about 16 mol%, and the properties of polymer alloy that consists of nylon 6-66 (hereinafter PA) and new EVOH were studied. The polymer alloy showed compatibility on the PA rich side,but the crystallinity of each component decreased at the same time. Especially when the PA content is 85wt.% for polymer alloy, PA crystals were not confirmed. The free volume of the composite increased linearly with the PA blend ratio,but the specific volume deviated from the linear relationship,which increased on the PA rich side. The normalized free volume was calculated using the amorphous ratio calculated from solid state NMR(T 1C : 13 C spin-lattice relaxation time) and I 3 (the relative intensity of the long time component) from PALS. It was confirmed that high pressure hydrogen resistance of PA blended with new EVOH was improved by using normalized free volume even on the PA rich side. This result is thought to be due to the amorphous part of PA reinforced by interaction with new EVOH. © 2019 The Society of Materials Science, Japan.
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页码：34 / 41
页数：7
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