支化聚丁二酸丁二醇酯的合成及流变性能  

Synthesis and Rheological Properties of Branched Poly(butylene succinate)

作　　者：王灿 张梦茹 肖汪洋 廖梦蝶 张须臻[1] 王秀华[1] Can Wang;Mengru Zhang;Wangyang Xiao;Mengdie Liao;Xuzhen Zhang;Xiuhua Wang(National Engineering Lab of Textile Fiber Materials and Processing Technology,Zhengjiang Sci-Tech University,Hangzhou 310018,China;Zhejiang Provincial Innovation Center of Advanced Textile Technology,Shaoxing 312000,China)

机构地区：[1]浙江理工大学纺织纤维材料与加工技术国家地方联合工程实验室,浙江杭州310018 [2]浙江省现代纺织技术创新中心,浙江绍兴312000

出　　处：《高分子材料科学与工程》2024年第12期10-18,共9页Polymer Materials Science & Engineering

基　　金：浙江省现代纺织技术创新中心科研专项资金(CXZX2023019HD)。

摘　　要：为了调控聚丁二酸丁二醇酯(PBS)的流动性和结晶性能,文中选取丙三醇、季戊四醇为支化剂,采用酯化-缩聚法合成了一系列不同支化剂及添加量的支化PBS。利用红外光谱、核磁共振、差示扫描量热分析(DSC)、凝胶渗透色谱(GPC)、偏光显微镜(POM)和毛细管流变仪等,考察了支化剂种类和添加量对聚合物结构、相对分子质量、热性能、结晶性和流变性能的影响。DSC和GPC分析结果表明,在相同出料功率下合成的支化PBS的相对分子质量均大于线型PBS,但熔点几乎不变,约为114℃;POM结果表明,支化剂的加入降低了PBS的结晶度及晶粒尺寸;熔融指数速率仪及毛细管流变仪结果表明,支化PBS的特性黏度均低于线型PBS,而支化PBS的熔融指数均高于线型PBS,且随支化剂量的增加而增大;支化PBS的熔体强度较线型PBS有较大幅度的提高,熔体强度分别提高了135.3%(0.3%丙三醇)和205.9%(0.2%季戊四醇)。研究结果为支化脂肪族聚酯的开发和在纤维领域的应用奠定了基础。To modify the fluidity and crystallization properties of poly(butylene succinate)(PBS),glycerol and pentaerythritol were selected as branching agent.A range of PBS polyesters with varying types and amounts of branching agents were synthesized by direct esterification-polycondensation method.FT-IR,1H-NMR,DSC,GPC,and capillary rheology test were employed to investigate the impact of the type and quantity of branching agent on the structure,molecular weight,thermal properties,rheological properties,and crystallization properties of the materials.The results show that the relative molecular weight of branched PBS is higher than that of linear PBS,but the melting point is almost constant,about 114℃.POM results show that the addition of branching agent decreases the crystallinity and grain size of PBS.The results of melt index rate and capillary rheometer show that the intrinsic viscosity of branched PBS is lower than that of linear PBS,while the melt index of branched PBS is higher than linear PBS,and it increases with the increase of branched dose.Compared with linear PBS,the melt strength of branched PBS is increased by 135.3%(0.3%glycerol)and 205.9%(0.2%pentaerythritol),respectively.The results of this study can lay a foundation for the development of branched aliphatic polyester and its application in the field of fiber.

关 键 词：支化聚丁二酸丁二醇酯 支化剂 流变性能 熔体强度 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]