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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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助剂对可生物降解聚碳酸亚丙酯/聚丙烯非织造布切片性能的影响
DOI: 10.3724/SP.J.1105.2013.12228, PP. 482-490
Keywords: 马来酸酐,马来酸酐接枝聚丙烯,聚碳酸亚丙酯,聚丙烯,生物降解,非织造布
Abstract:
采用熔融共混法研究助剂马来酸酐(MAH)、马来酸酐接枝聚丙烯(PP-2)对可生物降解聚碳酸亚丙酯(PPC)/聚丙烯(PP)非织造布切片结构与性能的影响.红外谱图表明MAH和PP-2的酸酐官能团与PPC发生了开环反应.MAH、PP-2可显著提高切片的拉伸强度,当MAH,PP-2用量为1%和2%时,切片拉伸强度较不添加助剂时分别提高了116%和101%.MAH,PP-2的加入降低了切片的熔体流动速率,提高了特性黏数,同时提高了切片的玻璃化转变温度(Tg)和热分解温度,扩大了切片的使用和加工温度范围.当MAH用量为1%时,切片Tg提高了4℃.当MAH,PP-2用量为1%和2%时,切片5%热分解温度分别提高了44℃和20℃.加入MAH、PP-2的切片断面的微观形貌图显示切片内部凹陷和空洞较少,较为平整,PP-2改善切片相容性的效果优于MAH.PPC和PP置于磷酸缓冲液中30天的降解率分别为4.30%和0%,说明PP在磷酸缓冲液中几乎不降解.加了助剂的切片30天的降解率在3.80%以上,说明制备的PPC/PP非织造布切片是可降解的,对环境友好.开环反应、增加切片界面黏附力、降低界面张力等可能是助剂提高切片性能的作用机理.
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