中国塑料 ›› 2025, Vol. 39 ›› Issue (8): 6-11.DOI: 10.19491/j.issn.1001-9278.2025.08.002

• 材料与性能 • 上一篇    下一篇

PPC/PHBV共混材料的力学及热学性能研究

闵家璇, 江学良, 游峰, 陆刚()   

  1. 武汉工程大学材料科学与工程学院,等离子体材料与化学湖北省重点实验室,武汉 430205
  • 收稿日期:2024-09-10 出版日期:2025-08-26 发布日期:2025-07-30
  • 通讯作者: 陆刚(1991—),男,讲师,从事功能高分子材料及应用研究,ganglu2019@163.com
    E-mail:ganglu2019@163.com
  • 作者简介:第一联系人:地址:北京市海淀区阜成路11号《中国塑料》杂志社
    邮编:100048

Mechanical and thermal properties of PPC/PHBV blends

MIN Jiaxuan, JIANG Xueliang, YOU Feng, LU Gang()   

  1. Hubei Key Laboratory of Plasma Chemistry and New Materials,School of Material Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China
  • Received:2024-09-10 Online:2025-08-26 Published:2025-07-30
  • Contact: LU Gang E-mail:ganglu2019@163.com

摘要:

通过熔融共混法制备了聚碳酸亚丙酯(PPC)与聚(3⁃羟基丁酸酯⁃co⁃3羟基戊酸酯)共聚物(PHBV)共混材料,系统研究了PHBV含量对聚碳酸亚丙酯基/聚(3⁃羟基丁酸酯⁃CO⁃3羟基戊酸酯)(P⁃BV)共混材料力学及热学性能的影响。结果表明,当PHBV在PPC共混材料中的含量增加至15 %(质量分数,下同)时,共混材料的拉伸强度达到12.6 MPa,是纯PPC的2倍以上;当PHBV在PPC共混材料中的含量增加至20 %时,共混材料的储能模量(E′)和损耗因子(Tan δ)显著提升,玻璃化转变温度(Tg )从16 ℃提升至20 ℃;当PHBV在PPC共混材料中的含量增加至30 %时,共混材料的维卡软化点从33 ℃提高至58 ℃。红外光谱分析表明,PPC与PHBV的复合增强了彼此间氢键相互作用,有效限制了分子链段的运动,从而对PPC共混材料的力学及热稳定性能的改善起到了促进作用,综合P⁃BV共混材料的断面形貌分析可知,当PHBV含量为15 %时,可有效平衡共混材料的力学及热学性能。

关键词: 聚碳酸亚丙酯, 聚(3?羟基丁酸酯?co?3羟基戊酸酯)共聚物, 共混材料, 力学性能, 热稳定性

Abstract:

Poly(propylene carbonate) (PPC)/poly(3⁃hydroxybutyrate⁃co⁃3⁃hydroxyvalerate) (PHBV) blends were prepared via melt blending, and the effect of PHBV content on their mechanical and thermal properties were systematically investigated. The results indicated that increasing the PHBV content up to 15 wt% enhanced the tensile strength of the blend to 12.6 MPa, which is more than twice that of pure PPC. At 20 wt% PHBV, the storage modulus and loss factor of the blends were improved significantly, while their glass transition temperature increased from 16 to 20 ℃. Further increasing the PHBV content to 30 wt% raised the Vicat softening point from 33 °C to 58 ℃. Infrared spectroscopy analysis revealed that hydrogen bonding interactions between PPC and PHBV restricted molecular chain mobility, thereby enhancing the mechanical and thermal stability of the blends. Fracture morphology analysis demonstrated that a 15 wt% PHBV content optimally balanced the mechanical and thermal properties of the blends.

Key words: poly(propylene carbonate), poly(3?hydroxybutyrate?co?3?hydroxyvalerate) copolymer, composite, mechanical property, thermal stability

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