Rheological behavior, morphology and mechanical property of poly(propylene carbonate)/thermoplastic oxidized starch composites

JIANG Guo; XU Jinghuo; FENG Jian; HUANG Hanxiong; ZHANG Shuidong

doi:10.11949/j.issn.0438-1157.20141682

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Rheological behavior, morphology and mechanical property of poly(propylene carbonate)/thermoplastic oxidized starch composites

更新时间：2025-11-26

- Rheological behavior, morphology and mechanical property of poly(propylene carbonate)/thermoplastic oxidized starch composites
- CIESC Journal Vol. 66, Issue 7, Pages: 2718-2724(2015)
- 作者机构：
  
  华南理工大学机械与汽车工程学院工业装备与控制工程系,广东,广州,510640
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20141682
  CLC： B324
- Online First：05 July 2015，
  
  Published：05 July 2015
- 稿件说明：
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JIANG Guo, XU Jinghuo, FENG Jian, et al. Rheological behavior, morphology and mechanical property of poly(propylene carbonate)/thermoplastic oxidized starch composites[J]. CIESC Journal, 2015, 66(7): 2718-2724.
DOI：

JIANG Guo, XU Jinghuo, FENG Jian, et al. Rheological behavior, morphology and mechanical property of poly(propylene carbonate)/thermoplastic oxidized starch composites[J]. CIESC Journal, 2015, 66(7): 2718-2724. DOI： 10.11949/j.issn.0438-1157.20141682.

摘要

采用熔融共混的方法制备了马来酸酐接枝聚碳酸亚丙酯(PPCMA)/热塑性淀粉(TPS)、PPCMA/热塑性氧化淀粉(TPOS)和PPCMA/ DL-TPOS(铝酸酯预处理的TPOS)复合材料

研究淀粉的氧化以及偶联剂的加入对PPC复合材料流变、形态和性能的影响。加入淀粉后的PPC复合材料拉伸强度有较大提高

红外光谱结果显示淀粉和PPCMA之间形成了氢键作用

这可能是力学性能提高的主要原因;热塑性氧化淀粉与PPCMA基材的界面相容性提高

PPCMA/TPOS复合材料的力学性能、储能模量、损耗模量和复数黏度均高于PPCMA/TPS复合材料;铝酸酯对TPOS的预处理促进了TPOS在PPCMA中的分散

提高了复合材料的拉伸强度

在PPCMA/DL-TPOS体系中

当DL-TPOS含量为40%(质量分数)时拉伸强度达到最大值

与PPCMA相比

提高了4.6倍。

Abstract

Maleic anhydride grafted poly(propylene carbonate) (PPCMA)/thermoplastic starch (TPS)

PPCMA/thermoplastic oxidized starch (TPOS) and PPCMA/DL-TPOS (TPOS modified by aluminate coupling agent) composites were prepared by melt blending. Effects of starch oxidation and content of DL and DL-TPOS on rheological behavior

morphology and mechanical properties of composites were investigated. The results of Fourier Transform Infrared Spectroscopy (FTIR) revealed that the reinforcement in mechanical properties of PPC/starch composites was probably resulted from hydrogen-bonding interaction between carbonyl groups of PPC and hydroxyl groups of starch. The compatibility between PPCMA and TPOS was better than that of PPCMA and TPS. The mechanical property

storage modulus (G')

loss modulus (G'') and complex viscosity (η*) of composites were improved by oxidation of starch. Moreover

the dispersion of TPOS in PPC matrix became better when starch was modified by DL

improving the tensile strength of composites. For PPCMA/DL-TPOS composites

the tensile strength increased by 460% from 2.45 MPa to 13.72 MPa

when DL-TPOS content was from 0 to 40% (mass)

while it decreased when the loading of DL-TPOS was 50% (mass). In addition

G'' and η* of composites was improved with increasing DL-TPOS content.

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