聚乙醇酸/脂肪族聚酯复合材料的制备及其性能分析
Preparation of polyglycolic acid/aliphatic polyester composites and their property analysis
程嘉伟 1江国华2
作者信息
- 1. 浙江理工大学材料科学与工程学院,杭州 310018
- 2. 浙江理工大学材料科学与工程学院,杭州 310018;浙江省智能生物材料与功能纤维国际科技合作基地,杭州 310018
- 折叠
摘要
为了改善聚乙醇酸(PGA)复合材料在常温下的降解和力学性能,以PGA为原料、脂肪族聚醋(聚醋-A)为填料,通过熔融共混法制备了 PGA/聚醋-A复合材料,并分析了聚酯-A质量分数对于复合材料力学性能和降解速率的影响.结果表明:当聚酯-A质量分数为15％时,复合材料的拉伸应力和断裂伸长率分别达到89.18 MPa和4.21％,相较于PGA分别增加了 117.19％和120.42％;复合材料样条降解30 d后质量损失为4.13％,相较于PGA下降了61.62％;随着聚酯-A质量分数的增加,复合材料中PGA组分结晶度先降低后增加,复合材料的拉伸强度先增加后减小、断裂伸长率逐渐增加、降解速率逐渐降低、亲水性增加;在复合材料样条断面观察到"海岛"结构的微观形态,并且随着聚酯-A质量分数提高而更加明显地出现两个组分之间的相分离现象.PGA/聚酯-A复合材料可以有效改善PGA在常温下的力学和降解性能,研究可为制备兼具高力学性能和低降解速率的PGA基复合材料提供理论参考.
Abstract
To improve the degradation and mechanical properties of polyglycolic acid(PGA)composites at room temperature,PGA/polyester-A composites were prepared by melt blending with PGA as raw material and aliphatic polyester(polyester-A)as filler.The effect of the mass fraction of polyester-A on the mechanical properties and degradation rate of the composites was investigated.The results showed that when the mass fraction of polyester-A was 15％,the tensile stress and elongation at break of the composites reached 89.18 MPa and 4.21％,which increased by 117.19％and 120.42％,respectively compared with those of the pure PGA samples;the mass loss of the composites after 30 days of degradation was 4.13％,which decreased by 61.62％compared with that of the pure PGA samples;as the mass fraction of polyester-A increased,the crystallinity of the PGA component in the composites first decreased and then increased,the tensile strength of the composites first increased and then decreased,the elongation at break increased gradually,the degradation rate gradually decreased,and the hydrophilicity increased.In addition,the micro-morphology of the"island"structure was observed in the composites'sample section,and the phase separation of the two components became more pronounced as the mass fraction of the polyester-A increased.To sum up,the PGA/polyester-A composites can effectively improve the mechanical and degradation properties of PGA at room temperature.The study can provide theoretical reference for the preparation of PGA-based composites with both high mechanical properties and low degradation rates.
关键词
聚乙醇酸/脂肪族聚酯/熔融共混/降解速率/力学性能Key words
polyglycolic acid/aliphatic polyester/melt blending/degradation rate/mechanical properties引用本文复制引用
基金项目
浙江省自然科学基金华东医药企业创新发展联合基金(LHDMZ23H300003)
出版年
2024
NETL
NSTL
万方数据