聚乳酸改性研究＊
林文,马超,龚晓钟
【摘要】摘要:绿色环保材料聚乳酸具有良好的生物降解性、相容性及化学惰性,同时又具有性脆,耐热性差等缺点,本文针对这些缺点,通过加入不同种类、不同比例的增塑剂及助剂对聚乳酸进行修饰。应用热机械分析仪 (T MA)、扫描电子显微镜 (SE M)、动态力学分析仪(DMA)等对其性能进行了分析。实验结果表明改性后的聚乳酸在保持生物降解性的同时热稳定性、韧性等方面都有显著提高。改性后的聚乳酸玻璃化转变温度比改性前提高了7℃,耐热性得到改善;通过动态力学分析及扫描电镜图观测,改性后聚乳酸材料的脆性明显得到改善。【期刊名称】广州化工
【年(卷),期】2010(038)009
【总页数】2
【关键词】关键词:聚乳酸;改性;韧性;耐热性
Abstract:PLA as green material had the characters of good biodegradation perfor mance,compatibility and chemical inertness,the weaknessof brittleness and bad heat resistance.Aimed at these weaknesses,adding different kinds and different scalesof additive,some of themechanical and thermodynamic capabilitieswere improved.Utilizing heatmechanical analyzer(tma),the scanning electron microscope(sem),dynamic mechanics analyzer(dma)and other instruments,the capability of PLA was analyzed.The experimental results showed that the modified sample had improved the heat resistance and