【作者】 金秀洪；

【导师】 金日光；

【作者基本信息】 北京化工大学 ， 高分子化学与物理， 2004， 硕士

【摘要】 随着社会的进步,科技的发展,高分子材料正逐步向高性能化、功能化、工程化、结构化等方面发展。液晶聚合物凝聚态微观结构及其形成机理的研究的重要意义在于:液晶聚合物在各种相态中独特的微观结构决定了其优异性能。本文合成了一种在结构上存在着大量醚键的热致液晶聚酰胺,用红外光谱(IR)、差示扫描量热法(DSC)、偏光显微镜(POM)和扫描电子显微镜(SEM)等方法进行表征。将这种热致液晶聚酰胺与尼龙1010共混,并加入N-乙基-对-甲苯磺酰胺作为增塑剂,进行了结构与性能的研究。研究表明,7份的增塑剂N-乙基-对-甲苯磺酰胺对尼龙1010的增塑效果明显,其共混物的拉伸/冲击等性能均有很大的提高。尼龙1010的增塑机理是由于破坏了尼龙1010的分子间氢键作用,增塑剂中的—NH—和尼龙1010分子链上的羰基生成氢键,从而取代了尼龙1010的分子间氢键。由于尼龙1010本身有较长的亚甲基链,所以在氢键破坏以后,分子的柔韧性大为提高。采用群子统计理论研究了液晶链的群子统计分布理论,进行了液晶高分子链的群子分布对熔融过程的模拟。更多还原

【Abstract】 With the development of society and the improvement of science and technology, polymer materials are developing toward the high performance, functional, engineering and structural. One of the questions which have been most extensively investigated and still remain controversial is low dimension order structure of liquid crystalline polymers (LCP) and of condensation phases formed by LCP.This paper is about a thermotropic liquid crystalline polyamide(LCP). Use many research technique of polymer material as characterization measures, for example, optical polarizing micrographs, DSC, FTIR, SEM, and all so. Modify nylon 1010 (PA1010) with this LCP by means of mechanical blending. And add plasticizing agent as plasticizing agent into nylon 1010 to plasticize. All results point to that 7%wt plasticizing agent add into PA1010 can receive high ensile strength and impact strength.In this paper, it can be seen that, the plasticate mechanism of PA1010 is because of the breaking of the hydrogen bond between PA1010 molecules. After plasticizing agent was add, the —NH— in the plasticizing agent react with the —COOH on the PA1010 molecular chain to form hydrogen bond respectively, which take the place of the hydrogen bond between PA1010. Because PA1010 molecule has long —CH2— chain <WP=5>of itself, so after the hydrogen bond is break, the softness of the molecule greatly improve. Applied of the fourth Statistics—JRG Sub-cluster Statistics Theory, investigate on the Liquid Crystalline chain during melting stage.更多还原