中国塑料 ›› 2024, Vol. 38 ›› Issue (10): 10-15.DOI: 10.19491/j.issn.1001-9278.2024.10.003

• 材料与性能 • 上一篇    下一篇

强韧化聚(3⁃羟基丁酸⁃co⁃3⁃羟基戊酸酯)/聚碳酸酯共混物的制备及耐久性研究

吕东轩1, 徐鹏武1(), 杨伟军1, 钮德宇1, 孙钰杰2, 马丕明1   

  1. 1.江南大学化学与材料工程学院,江苏 无锡 214122
    2.龙口市应急保障服务中心,山东 龙口 265499
  • 收稿日期:2024-02-01 出版日期:2024-10-26 发布日期:2024-10-21
  • 通讯作者: 徐鹏武(1992—),副教授,研究方向为生物基/可生物降解高分子材料的高性能化和功能化,聚合物共混及复合材料,pengwuxu@jiangnan.edu.cn
    E-mail:pengwuxu@jiangnan.edu.cn

Study on preparation and durability of toughened poly(3⁃hydroxybutyrate⁃co-3⁃hydroxyvalerate)/polycarbonate blending films

LYU Dongxuan1, XU Pengwu1(), YANG Weijun1, NIU Deyu1, SUN Yujie2, MA Piming1   

  1. 1.School of Chemical And Material Engineering,Jiangnan University,Wuxi 214122,China
    2.Longkou Emergency Support Service Center,Longkou 265701,China
  • Received:2024-02-01 Online:2024-10-26 Published:2024-10-21
  • Contact: XU Pengwu E-mail:pengwuxu@jiangnan.edu.cn

摘要:

以聚(3⁃羟基丁酸⁃co⁃3⁃羟基戊酸酯)(PHBV)作为基体,通过共混聚碳酸亚丙酯(PPC)后进行固相拉伸,制备强韧化PHBV/PPC复合薄膜;通过万能拉伸试验机、小角/广角X射线散射仪、场发射扫描电子显微镜、差示扫描量热仪对共混物进行表征。结果表明,当固相拉伸温度为55 ℃、拉伸速率为300 mm/min,拉伸倍率为3时,对比未拉伸样品,断裂伸长率提高约为66 %,拉伸强度提高约为642.9 %。当拉伸倍率为3时,取向度从0.88 %提升到38.96 %,还有效促进了聚合物的结晶,对PHBV的耐久性产生了正向作用,使得其性能更加稳定,对比未拉伸样品有了明显提升:未拉伸样品的韧性下降95 %,固相拉伸3倍的样品的韧性下降46 %。

关键词: 聚(3?羟基丁酸?co?3?羟基戊酸酯), 聚碳酸酯, 固相拉伸, 力学性能

Abstract:

The toughened poly(3⁃hydroxybutyrate⁃co⁃3⁃hydroxyvalerate) (PHBV)/polypropylene carbonate (PPC) blending films were prepared through solid⁃phase stretching and then characterized by using universal tensile testing machine, small⁃angle/wide⁃angle X⁃ray scattering instrument, SEM, and DSC. The PHBV/PPC blending films exhibited an increase in elongation at break by about 66 % and in tensile strength by 642.9 % at a stretching temperature of 55 ºC, a stretching rate of 300 mm/min, and a stretching ratio 3. The degree of orientation of the blending films was increased from 0.88 % to 38.96 % at a stretching ratio of 3. This effectively promotes the crystallization of PHBV and generates a positive effect on its durability of PHBV, resulting in more stable performance. The toughness of the unstretched blending film decreased by 94.8 %, whereas there was only a reduction by 46 % in the toughness of the blending film at a stretching ratio of 3.

Key words: poly(3?hydroxybutyrate?co?3?hydroxyvalerate), polycarbonate, solid?phase stretching, mechanical property

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