The Preparation and Property Measurements of the Grafted Poly(lactic acid) and Plastified Starch Blends

Li-qing QIU; Hang-zhong LIU; Yue-jin TONG; Huai-min GUAN

doi:10.14028/j.cnki.1003-3726.2017.09.009

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The Preparation and Property Measurements of the Grafted Poly(lactic acid) and Plastified Starch Blends

更新时间：2022-09-06

- The Preparation and Property Measurements of the Grafted Poly(lactic acid) and Plastified Starch Blends
- Polymer Bulletin Vol. 30, Issue 9, Pages: 61-70(2017)
- 作者机构：
  
  1.武夷学院生态与资源工程学院，福建省竹材工程技术研究中心，福建省生态产业绿色技术重点实验室，武夷山 354300
  2.福建师范大学材料科学与工程学院，福建省高分子材料重点实验室，福州 350007
  3.福建师范大学化学与化工学院，福州 350007
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2017.09.009
  CLC：
- Published：01 September 2017，
  
  Received：22 October 2016，
  
  Revised：28 June 2017，
扫描看全文
Li-qing QIU, Hang-zhong LIU, Yue-jin TONG, Huai-min GUAN. The Preparation and Property Measurements of the Grafted Poly(lactic acid) and Plastified Starch Blends. [J]. Polymer Bulletin 30(9):61-70(2017)
DOI：

Li-qing QIU, Hang-zhong LIU, Yue-jin TONG, Huai-min GUAN. The Preparation and Property Measurements of the Grafted Poly(lactic acid) and Plastified Starch Blends. [J]. Polymer Bulletin 30(9):61-70(2017) DOI： 10.14028/j.cnki.1003-3726.2017.09.009.

摘要

为提高聚乳酸（PLA）/淀粉共混物界面作用和降低成本，引入甲基丙烯酸缩水甘油酯（GMA）接枝聚乳酸和塑化淀粉（TPS），通过挤出和注射成型制备接枝聚乳酸/塑化淀粉共混物（PLA-g-GMA/TPS）。红外光谱分析证实，GMA成功接枝到PLA分子链上。对共混物的力学性能、热机械性能、微观形貌、热性能及亲水性等进行了系统研究，结果表明，选择GMA用量为6%（接枝率为1.51%）和TPS用量为10%时的拉伸强度、断裂伸长率及弹性模量最佳，分别为42.6MPa、8.9%及260MPa。FE-SEM观察结果表明，低含量TPS中颗粒被基体包覆或嵌入，界面平整，界面结合力强。DMA和DSC结果显示，不同质量配比的PLA-g-6%GMA/TPS共混物的T

、储存模量、结晶度、结晶温度及熔融温度仅在小范围内发生变化。吸水率和接触角结果表明，低含量TPS的共混物吸水率和接触角变化幅度均小于高含量TPS体系。

Abstract

The grafted poly(lactic acid)/thermoplastic starch blends with glycidyl methacrylate and thermoplastic starch addition were prepared by extrusion and injection molding technologies to improve the interfacial adhension of PLA/starch and lower the cost. Infrared spectrum analysis confirms that GMA has been successfully grafted onto the PLA. The mechanical properties

the thermal properties

the morphology of fractured composite surfaces and hydrophilic properties above were well-analyzed. The optimum results of tensile strength

elongation at break and elasticity modulus are 42.6MPa

8.9% and 260MPa respectively

which is explored at the mass of 6% GMA and 10% TPS (the grafting ratio is 1.51%). Compared with higher thermoplastic starch content in the blends

the FE-SEM observations show that the starch particles on the tensile fracture surface of lower thermoplastic starch content are better embedded in the matrix

resulting in the partial starch granules and a strong interfacial adhension obviously. DMA and DSC results show that T

storage modulus

crystallinity

crystalline temperature and melting temperature just change on a small scale with different mass ratio of PLA-g-6% GMA/TPS blends. The results of water absorption and contact angle values indicate that the blends of lower thermoplastic starch change less than those of higher thermoplastic starch.

关键词

聚乳酸接枝共聚物塑化淀粉共混物甲基丙烯酸缩水甘油酯

Keywords

Polylactic acid grafting copolymerPlastified starchBlendGlycidyl methacrylate

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