Additive Effects on Thermotropic Liquid Crystal Polymer Alloys II. Effects of Third Component of Thermotropic Liquid Crystal Polymer on Mechanical Properties of Vectra A-Reinforced Poly(butylene terephthalate)
Additive Effects on Thermotropic Liquid Crystal Polymer Alloys II. Effects of Third Component of Thermotropic Liquid Crystal Polymer on Mechanical Properties of Vectra A-Reinforced Poly(butylene terephthalate)
复制标题
热致液晶聚合物合金的相加效应 II。
DOI：
10.1295/polymj.26.953
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发表时间：
1994
期刊：
影响因子：
2.8
通讯作者：
M. Takayanagi
中科院分区：
文献类型：
--
作者：
Li;T. Sakamoto;S. Ueta;K. Koga;M. Takayanagi
研究了热致液晶聚合物(TLCP)第三组分的加入对Vectra A增强聚对苯二甲酸丁二醇酯(PBT)力学性能和结构的影响。第三个TLCP是基于对羟基苯甲酸酯(PHB)和对苯二甲酸乙二酯的共聚物，称为X-7G。PBT、Vectra A和第三种TLCP在熔融状态下共混，其挤出物被切割和注射成型。两种热致液晶聚合物的复合提高了共混物的力学性能。动态粘弹性分析表明，当Vectra A作为TLCP的主要补强体时，三元共混物的耐热性得到提高。扫描电子显微镜显示，二元和三元共混物都是相分离的，TLCP第三组分的引入有利于TLCP在样品的皮肤部分形成更细小的纤维。X-射线衍射仪分析表明，三元共混物中加入第3个TLCP后，共混物中Vectra A原纤取向增加，从而改善了三元共混物的力学性能。本文所得结论与前文报道的结论一致。
The effects of addition of the 3rd component of thermotropic liquid crystal polymer (TLCP) on the mechanical properties and structure of Vectra A-reinforced poly(butylene terephthalate) (PBT) were studied. The 3rd TLCP was the copolymer based on p-hydroxybenzoate (PHB) and ethylene terephthalate, known as X-7G. PBT, Vectra A, and the third TLCP were blended in the molten state, the extrudate of which was cut and injection-molded. The mechanical properties of the blends were improved by the combination of the two kinds of TLCP. The dynamic viscoelastic analysis indicated that the thermal endurance of the ternary blends were enhanced when Vectra A was used as a major TLCP reinforcement. SEM revealed that both the binary and ternary blends were phase-separated, and the introduction of the 3rd component of TLCP was profitable for TLCP to form finer fibrils at the skin part of the sample. X-Ray diffraction analysis showed that the orientation of Vectra A fibril in the blend was raised by the addition of the 3rd TLCP, resulting in the improvement of the mechanical properties of the ternary blends. The conclusions obtained in this paper agreed with those reported in our previous paper.