液晶聚氨酯/尼龙6复合材料的制备与表征

全文下载： 202102011.pdf

文章编号： 1672-6987（2021）02-0079-06； DOI： 10.16351/j.1672-6987.2021.02.011

孙玮良a，b，c， 赵申仁a，b，c， 辛浩波a，b，c*（青岛科技大学 a.高分子科学与工程学院；b.功能高分子研究所；c.橡塑材料与工程教育部重点实验室，山东 青岛 266042）

摘要： 通过分子结构设计，成功合成了一种与工程塑料尼龙6（PA6）具有良好相容性的热致性液晶聚氨酯（LCPU），采用挤出注塑的方式制备了不同配比的LCPU/PA6复合材料，其结构与性能通过红外光谱仪（FT-IR）、差示扫描量热仪（DSC）、偏光显微镜（POM）、扫描电子显微镜（SEM）、万能拉力机和毛细管流变仪进行表征。结果表明，当LCPU的质量分数为6%时，LCPU/PA6的拉伸强度增强了506%，弯曲强度提升了510%；LCPU独特的流变学特性改善了PA6的加工性能，材料的熔体流动速率（MFR）由885 g·（10 min）-1提升至2615 g·（10 min）-1；复合材料的断面SEM照片表明，LCPU在复合体系中原位成纤，且在PA6基体中分散均匀，并且与基体的相容性良好。

关键词： 液晶聚氨酯； 尼龙6； 原位成纤

中图分类号： TQ 323.8文献标志码： A

引用格式： 孙玮良， 赵申仁， 辛浩波. 液晶聚氨酯/尼龙6复合材料的制备与表征［J］. 青岛科技大学学报(自然科学版), 2021, 42(2): 79-84.

SUN Weiliang， ZHAO Shenren, XIN Haobo. Preparation and characterization of liquid crystalline polyurethane/nylon 6 composites［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2021， 42(2)： 79-84.

Preparation and Characterization of Liquid Crystalline

Polyurethane/Nylon 6 Composites

SUN Weilianga，b，c， ZHAO Shenrena，b，c, XIN Haoboa，b，c

（a. College of Polymer Science and Engineering; b. Institute of Function Polymer; c. Key Laboratory of Rubber-Plastics,

Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China）

Abstract: A thermotropic liquid crystalline polyurethane (LCPU) with good compatibility with engineering plastics nylon 6 (PA6) was successfully synthesized by molecular structure design. LCPU/PA6 composites with different proportions were prepared by extrusion-injection method. The structure and properties of LCPU/PA6 composites were characterized by FT-IR, DSC, POM, SEM, universal tension machine and capillary rheometer. The cross-section SEM photos of the composite show that the LCPU is recovering. In-situ fibrillation and uniform dispersion in PA6 matrix are achieved in the system, and the compatibility with the matrix is good. The results show that when the mass fraction of LCPU is 6%, the tensile strength of LCPU/PA6 is increased by 506%, and the bending strength is increased by 510%. The unique rheological properties of LCPU improve the processing performance of PA6. The melting flow rate (MFR) of material is increased from 885 g·（10 min）-1 to 2615 g·（10 min）-1. The cross-sectional SEM photographs of the composite show that the LCPU is in-situ fibrillating and LCPU disperses uniformly in the PA6 matrix and is compatible with the matrix.

Key words: liquid crystal polyurethane; nylon6; in-situ fibrillation

收稿日期： 2020-04-17

基金项目： 山东省自然科学基金项目(ZR2010EL018).

作者简介： 孙玮良（1994—），男，硕士研究生.*通信联系人.