聚丁二酸丁二醇酯/硫酸钙晶须复合材料的制备及性能  

Preparation and Properties of Poly(butylene succinate)/Calcium Sulfate Whisker Composites

作　　者：李丽芬 邓雯昕 许伦能 熊少峰 余鹏 LI Lifen;DENG Wenxin;XU Lunneng;XIONG Shaofeng;YU Peng(School of Materials and Chemical Engineering,Hubei Provincial Key Laboratory of Green Materials for Light Industry,Hubei University of Technology,Wuhan 430068,China;Hubei Longzhong Laboratory,Xiangyang 441138,China)

机构地区：[1]湖北工业大学材料与化学工程学院,湖北工业大学绿色轻工材料湖北省重点实验室,湖北武汉430068 [2]湖北隆中实验室,湖北襄阳441138

出　　处：《塑料工业》2024年第12期38-44,共7页China Plastics Industry

基　　金：大学生创新创业训练计划项目(202210500014);湖北省自然科学基金项目(2022CFB511)。

摘　　要：利用常压酸化法从废弃磷石膏中制备出硫酸钙晶须(CSW),采用硅烷偶联剂对CSW表面进行有机改性得到mCSW,通过聚丁二酸丁二醇酯(PBS)和mCSW熔融共混制备含不同质量分数mCSW的PBS/mCSW复合材料,同时对PBS/mCSW复合材料的微观结构和性能进行了研究。结果表明,当mCSW质量分数小于10%时,mCSW在PBS基体中分散较好。当mCSW质量分数从0%增加至10%时,PBS/mCSW复合材料的结晶温度从62.3℃升高至67.6℃,结晶度从33.6%提高至52.4%,说明mCSW能够起到异相成核的作用。但当mCSW质量分数超过10%后,结晶温度和结晶度出现下降趋势。随着mCSW质量分数的增加,PBS/mCSW复合材料的维卡软化温度和初始热分解温度都呈现出先增加后降低的变化趋势。当mCSW质量分数为10%时,复合材料的维卡软化温度(101.4℃)和初始热分解温度(398.9℃)达到最大值。力学性能测试结果表明,拉伸强度和断裂伸长率也呈现出先增加后降低的变化趋势,当mCSW质量分数为10%时,复合材料的拉伸强度(31.7 MPa)和断裂伸长率(18.3%)达到最大值。缺口冲击强度随着mCSW质量分数的增加,总体上呈现先下降后趋于平稳的变化趋势。Calcium sulfate whisker(CSW)was prepared from waste phosphogypsum by the atmospheric acidification method.After the surface of CSW was organically modified via using silane coupling agent,the modified CSW(mCSW)was prepared.Then polybutylene succinate(PBS)/mCSW composites with different mCSW mass fractions were prepared through the melt blending of PBS and mCSW.The microstructures and properties of PBS/mCSW composites were investigated.The results show that mCSW is better dispersed in the PBS matrix when the mCSW mass fraction is less than 10%.When the mCSW mass fraction increases from 0%to 10%,the crystallization temperatures of PBS/mCSW composites increase from 62.3℃to 67.6℃,and the degrees of crystallinity increase from 33.6%to 52.4%,illustrating that the mCSW could play a role of heterogeneous nucleation.However,the crystallization temperature and degree of crystallinity show downward trends when the mass fraction of mCSW exceeds 10%.Both Vicat softening temperatures and initial thermal decomposition temperatures of PBS/mCSW composites increase first and then decrease with the increase of mCSW mass fraction.When the mCSW mass fraction is 10%,the Vicat softening temperature of composite reaches the maximum value of 101.4℃,and the initial thermal decomposition temperature reaches the maximum value of 398.9℃.The results of mechanical properties show that the tensile strength and elongation at break also increase first and then decrease with the increase of mCSW mass fraction.When the mCSW mass fraction is 10%,the tensile strength and elongation at break of PBS/mCSW composite reach the maximum values of 31.7 MPa and 18.3%,respectively.Moreover,the notch impact strength decreases first and then tends to be stable with the increase of mCSW mass fraction.

关 键 词：聚丁二酸丁二醇酯 硫酸钙晶须 硅烷偶联剂 磷石膏 复合材料 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]