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首页> 外文期刊>Journal of Applied Polymer Science >PROCESSING AND CHARACTERIZATION OF BLENDS OF FLUOROELASTOMERS WITH SEMIRIGID LIQUID CRYSTAL POLYMERS
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PROCESSING AND CHARACTERIZATION OF BLENDS OF FLUOROELASTOMERS WITH SEMIRIGID LIQUID CRYSTAL POLYMERS

机译：半刚性液晶聚合物与荧光弹性体共混物的加工与表征

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Fluoroelastomers (FEs) usually have working temperatures above 150 degrees C and a great resistance to aggressive agents such as oils, fuels, aliphatic and aromatic solvents, steam, moderate acid, and basic environments. Liquid crystal polymers (LCPs) can be effective processing aids and reinforcing agents for elastomers. These characteristics are very attractive to lower melt viscosity and to stiffen and strengthen the final product through a simple blending. Among the LCPs, the semirigid LCPs seem the most appealing for blending with flexible thermoplastics (FTs) because their processing temperatures can be arranged to be in the same processing temperature range of FTs and because the presence of flexible segments can improve the compatibility with the flexible matrix. This is very important especially for FEs that are subjected not only to mechanical degradation, but also to thermal degradation. Blends of FEs with two types of semirigid LCPs show easy processability and enhanced mechanical and thermomechanical properties. These improvements were observed both for pure FEs and for filled vulcanized systems. The improvement of the mechanical properties is below that expected on the basis of the additive rule due to the incompatibility between the components; nevertheless, an impressive increase of the elastic modulus, up to 40 times, was noticed by adding 20% of LCP. In vulcanized systems, the tensile strength is also increased, whereas the elongation at break is slightly reduced. The working temperature is also drastically increased both in vulcanized and in unvulcanized systems. (C) 1996 John Wiley & Sons, Inc. [References: 27]
机译：含氟弹性体（FE）的工作温度通常高于150摄氏度，并且对诸如油，燃料，脂族和芳族溶剂，蒸汽，中等酸度和碱性环境等侵蚀性物质具有很高的抵抗力。液晶聚合物（LCP）可以用作弹性体的有效加工助剂和增强剂。这些特性对于降低熔体粘度以及通过简单的混合来硬化和增强最终产品非常有吸引力。在LCP中，半刚性LCP似乎最适合与柔性热塑性塑料（FTs）混合，因为它们的加工温度可以设置在FTs的相同加工温度范围内，并且由于存在柔性链段可以改善与柔性热塑性塑料的相容性矩阵。这对于不仅要经受机械降解而且还要经受热降解的FE尤其重要。 FE与两种半刚性LCP的混合物显示出易于加工的性能，并增强了机械和热机械性能。对于纯FE和填充硫化系统均观察到了这些改进。由于组分之间的不相容性，机械性能的改善低于基于加和规则的预期。但是，通过添加20％的LCP，可以看到高达40倍的弹性模量显着提高。在硫化体系中，抗张强度也有所提高，而断裂伸长率则略有降低。在硫化和未硫化的系统中，工作温度也急剧增加。 （C）1996 John Wiley＆Sons，Inc. [参考：27]

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