使用聚己二酸/对苯二甲酸丁二醇酯(PBAT)对硬质聚乳酸(PLA)进行增强改性,并通过添加多元环氧扩链剂苯乙烯-甲基丙烯酸缩水甘油酯共聚物(ADR)和填充剂滑石粉(TALC)对PLA进行功能改性,采用熔融共混法制备了PLA/PBAT/ADR/TALC共混材料。采用转矩流变仪、电子万能试验机、差示扫描量热仪等对共混材料的加工流变行为、拉伸性能和热稳定性能进行测试,考察了ADR含量和TALC用量对共混材料性能的影响。结果表明:ADR不但起到扩链作用,还能在保持PLA/PBAT共混材料原有性能的同时,显著提高其拉伸韧性;ADR质量分数为0.3%时,PLA/PBAT/ADR共混材料综合性能较好;TALC用量为5份时,PLA/PBAT/ADR/TALC共混材料拉伸强度高达23.29MPa。
Rigid polylactic acid (PLA) was reinforced with poly(butylene adipate-co-terephthalate) (PBAT) and functionally modified through the incorporation of a multi-functional epoxy chain extender,styrene-glycidyl methacrylate copolymer (ADR),and talc (TALC) filler to prepare PLA/PBAT/ADR/TALC blends via melt blending.The processing rheological behavior,tensile properties,and thermal stability of the blends were characterized using a torque rheometer,universal testing machine,and differential scanning calorimetry (DSC),respectively,and the effects of ADR content and TALC loading on the blend performance were investigated.Results demonstrated that ADR not only effectively extended polymer chains but also significantly enhanced the tensile toughness of the PLA/PBAT blend while maintaining the baseline properties.The PLA/PBAT/ADR blend exhibited optimal overall performance at an ADR mass fraction of 0.3%.At a TALC loading of 5phr (parts per hundred resin),the PLA/PBAT/ADR/TALC blend achieved a tensile strength of 23.29MPa.
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基金资助
徐州工业职业技术学院教授(研究员)专项(XGY2022IA01);徐州工业职业技术学院高层次人才科研启动专项(XGY2024ZXWT06)
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