...
首页> 外文期刊>Materials >Polyvinyl Alcohol Microspheres Reinforced Thermoplastic Starch Composites
【24h】

Polyvinyl Alcohol Microspheres Reinforced Thermoplastic Starch Composites

机译:聚乙烯醇微球增强热塑性淀粉复合材料

获取原文
           

摘要

We reported a new method to prepare polyvinyl alcohol (PVA)/thermoplastic starch (TPS) composites by using polyvinyl alcohol microspheres (PVAMS). The PVAMS/TPS composites were characterized using tensile test, scanning electron microscopy (SEM), dynamic mechanical thermal analysis (DMTA) and thermogravimetric analysis (TGA). The results exhibited that adding small amounts of PVAMSs can effectively improve the mechanical strength and toughness of the composites, especially for the 1 wt %PVAMS in TPS matrix, with a tensile strength of 3.5 MPa, an elongation at break at 71.73% and an impact strength of 33.4 kJ/m 2 . Furthermore, the SEM and shift in the tan δ peak (T α and T β ) at the maximum value of 69.87 and ?36.52 °C indicates that the PVAMS decreased the mobility of the amorphous starch molecules due to the strong intermolecular hydrogen bonds between PVAMS and TPS. The peak temperature of maximum decomposition rate (Tp) of 1 wt % PVAMS/TPS composites increased about 5 °C compared with TPS in TGA curves.
机译:我们报告了一种通过使用聚乙烯醇微球(PVAMS)制备聚乙烯醇(PVA)/热塑性淀粉(TPS)复合材料的新方法。使用拉伸试验,扫描电子显微镜(SEM),动态机械热分析(DMTA)和热重分析(TGA)对PVAMS / TPS复合材料进行了表征。结果表明,添加少量的PVAMS可以有效地改善复合材料的机械强度和韧性,特别是对于TPS基体中1 wt%的PVAMS,拉伸强度为3.5 MPa,断裂伸长率为71.73%,并且具有冲击力。强度为33.4 kJ / m 2。此外,SEM和tanδ峰(Tα和Tβ)在69.87和?36.52°C的最大值处的移动表明,PVAMS由于无定形淀粉分子之间的强分子间氢键而降低了无定形淀粉分子的迁移率和TPS。在TGA曲线中,与TPS相比,1 wt%PVAMS / TPS复合材料的最大分解速率(Tp)的峰值温度增加了约5°C。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号