PVA可降解片材动态挤出制备及其塑化机理的开题报告

精品文档---下载后可任意编辑淀粉/PVA 可降解片材动态挤出制备及其塑化机理的开题报告摘要：本文讨论了淀粉/PVA 可降解片材的动态挤出制备方法及其塑化机理。通过对不同比例的淀粉和 PVA 混合物的挤出试验，确认了最佳的材料配比以及挤出工艺参数。同时，采纳 DSC 和热重分析仪对淀粉/PVA 混合物的熔体性能进行了讨论，探讨了材料的塑化机理。结果表明，淀粉和 PVA 的加入可以显著提高材料的熔融温度和熔融峰值，同时延长材料的稳定熔化时间，并促进挤出后的成型和硬化。关键词：淀粉/PVA；可降解片材；动态挤出；塑化机理Abstract:This paper studies the dynamic extrusion preparation method and plasticization mechanism of starch/PVA biodegradable film. Through the extrusion experiment of starch/PVA mixtures with different proportions, the optimal material ratio and extrusion process parameters were confirmed. At the same time, the melt properties of starch/PVA mixtures were studied using DSC and TGA, and the plasticization mechanism of the materials was explored. The results show that the addition of starch and PVA can significantly increase the melting temperature and melting peak of the materials, prolong the stable melting time of the materials, and promote the forming and hardening of the materials after extrusion.Keywords: starch/PVA; biodegradable film; dynamic extrusion; plasticization mechanism