摘要
高聚合度的生物可降解材料聚丁二酸丁二醇酯(PBS)具有较好的加工温度,能满足更多应用场景。但是,高聚合度导致PBS结晶度高、韧性较差。为了能降低PBS生产成本,提高PBS综合性能,分析了纯CaCO_(3)和硬脂酸修饰的活性CaCO_(3)对PBS结晶行为和力学性能的影响,研究了乙酰柠檬酸三丁酯(ATBC)对PBS增塑后,不同改性CaCO_(3)对PBS增塑基质结晶行为和力学性能的影响。结果表明,当PBS未增塑时,所有类型CaCO_(3)对PBS的结晶行为和力学性能的改善均较小。当PBS受到ATBC增塑作用后,韧性明显提高,刚性降低较大,当PBS塑化基质加入活性CaCO_(3),复合材料结晶率进一步降低,同时在PBS基质中更易形成微孔洞,并使颗粒间连结处发生塑性变形,实现表面张力的降低以及颗粒-基质粘附的降低。当添加20%活性CaCO_(3)时,复合材料力学性能达到最高,冲击强度为11.07 J/m、断裂伸长率为106.86%、弯曲模量为759.50 MPa,在实现提高韧性的同时,能保持较好的刚性。
As a biodegradable material of high polymerization degree of poly(butylene succinate)or PBS,had suitable processing temperature and could meet more adaptation scenarios.However,high polymerization degree leaded to high crystallinity and poor toughness of PBS.In order to reduce the production cost of PBS and improve the comprehensive properties of PBS,the effects of pure CaCO_(3)and stearic acid modified activated CaCO_(3)on the crystallization behavior and mechanical properties of PBS were first discussed,and then the effects of different modified CaCO_(3)on the crystallization behavior and mechanical properties of PBS plasticized matrix after acetyl tributyl citrate(ATBC)plasticized PBS were discussed.The results showed that when PBS was not plasticized,the crystallization behavior and mechanical properties of PBS were not obviously improved by all kinds of CaCO_(3).When PBS was plasticized by ATBC,the toughness was obviously improved,but the rigidity was seriously reduced.When activated CaCO_(3)was added to the plasticized matrix of PBS,the crystallization rate of the composite material was further reduced,and at the same time,it was easier to form micropores in the matrix of PBS,and plastic deformation occured at the joints between particles,thus reducing the surface tension and the adhesion between particles and matrix.When 20%activated CaCO_(3)was added,the mechanical properties of the composite reached the highest,with impact strength of 11.07 J/m,elongation at break of 106.86%and flexural modulus of 759.50 MPa,which improved toughness and kept better rigidity.
作者
卢翠红
黎胤宏
杨小平
李天然
张宇
张跃飞
LU Cuihong;LI Yinhong;YANG Xiaoping;LI Tianran;ZHANG Yu;ZHANG Yuefei(School of Chemistry and Chemical Engineering,Changsha University of Science and Technology,Changsha,Hunan 410114,China;Hunan Sun Young New Materials Co,Ltd,Changsha,Hunan 410200,China;Hubei New Nanhua Technology Co,Ltd,Jingzhou,Hubei 434200,China)
出处
《塑料》
北大核心
2025年第3期12-16,22,共6页
Plastics
基金
湖南省企业科技特派员项目(2021GK5007)。
关键词
聚丁二酸丁二醇酯
活性碳酸钙
乙酰柠檬酸三丁酯
力学性能
结晶行为
poly(butylene succinate)
activated calcium carbonate
acetyl tributyl citrate
mechanical properties
crystallization behavior
