基于结晶动力学研究聚丁二酸丁二醇酯/微晶纤维素弱界面相互作用对其结晶行为的影响
Effect of weak interfacial interaction between poly(butylene succinate)and micro-crystalline cellulose on its crystallization behavior based on crystallization kinetics
张阳 1廖壑 2张玥 1张玉梅1
作者信息
- 1. 东华大学 材料科学与工程学院,纤维材料改性国家重点实验室,上海 201620
- 2. 东华大学 机械工程学院,上海 201620
- 折叠
摘要
为了研究高含量刚性粒子存在下的成核作用和复合材料弱界面相互作用对聚丁二酸丁二醇酯(PBS)结晶行为的影响,采用熔融共混法制备了微晶纤维素(MCC)含量为 5wt%～25wt%的PBS/MCC复合材料,利用差示扫描量热仪对PBS/MCC复合单丝的熔融行为和非等温结晶动力学进行了表征和分析,并使用由Jeziorny模型修改的Avrami方法和由Vyazovkin修改的Friedman等转化率方法研究了PBS的结晶行为和结晶机制.结晶动力学研究表明:MCC可以作为有效的成核剂显著提高PBS的结晶温度和结晶速率,促进PBS晶体的生长,且不会改变PBS的成核机制和晶体生长几何形状,但PBS/MCC弱界面相互作用会明显抑制PBS自身成核能力,PBS结晶度从 34.8%降低至 28.8%.本文结果对研究高含量刚性粒子存在下的弱界面相互作用对PBS结晶行为的影响具有一定的指导意义.
Abstract
To study the impact of nucleation effect and weak interface interaction of composite materials in the presence of high content of rigid particles on the non-isothermal crystallization behavior of poly(butylene succinate)(PBS),PBS/MCC composites with microcrystalline cellulose(MCC)content of 5wt%-25wt%were prepared by melt blending.The melting behavior and non-isothermal crystallization kinetics of PBS were charac-terized by differential scanning calorimetry.The crystallization behavior and mechanism of PBS were analyzed using Avrami method modified by Jeziorny and Friedman's isoconversional method modified by Vyazovkin.Kinetics studies reveal that MCC can act as an efficient nucleating agent to increase the crystallization temperature and crystallization rate of PBS,and promote the growth rate of PBS crystals without changing the nucleation mechanism and crystal growth of PBS,but the weak interface interaction between PBS and MCC will significantly inhibit the nucleation ability of PBS and reduce its crystallinity which reduced from 34.8%to 28.8%.The results of this study have certain guiding significance for studying the influence of weak interface interactions on the crystal-lization behavior of PBS in the presence of high content rigid particles.
关键词
聚丁二酸丁二醇酯/微晶纤维素/非等温结晶动力学/界面相互作用/结晶机制Key words
poly(butylene succinate)/microcrystalline cellulose/non isothermal crystallization kinetics/interfa-cial interaction/crystallization mechanism引用本文复制引用
出版年
2024
NETL
NSTL
万方数据