环氧呋喃树脂反应性增容PLA/PBS共混体系的动态流变学表征

doi:10.11901/1005.3093.2017.658

材料研究学报

2018, Vol. 32

Issue (7): 547-554 DOI: 10.11901/1005.3093.2017.658

研究论文

本期目录 | 过刊浏览

环氧呋喃树脂反应性增容PLA/PBS共混体系的动态流变学表征

朱大勇^1,², 辜婷^1,², 于杰², 鲁圣军^1,²(

)

1 贵州大学材料与冶金学院贵阳 550025
2 国家复合改性聚合物材料工程技术研究中心贵阳 550014

Dynamic Rheological Characterization of PLA/PBS Blends Compatibilized by Epoxy Furan Resin

Dayong ZHU^1,², Ting GU^1,², Jie YU², Shengjun LU^1,²(

)

1 College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China
2 National Engineering Technology Research Center for Compounding and Modification of Polymeric Materials, Guiyang 550014, China

引用本文:

朱大勇, 辜婷, 于杰, 鲁圣军. 环氧呋喃树脂反应性增容PLA/PBS共混体系的动态流变学表征[J]. 材料研究学报, 2018, 32(7): 547-554.
Dayong ZHU, Ting GU, Jie YU, Shengjun LU. Dynamic Rheological Characterization of PLA/PBS Blends Compatibilized by Epoxy Furan Resin[J]. Chinese Journal of Materials Research, 2018, 32(7): 547-554.

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摘要:

用熔融共混法制备不同环氧呋喃树脂(FER)含量的聚乳酸/环氧呋喃树脂/聚丁二酸丁二醇酯(PLA/FER/PBS)共混物,使用旋转流变仪、扫描电镜(SEM)和万能试验机等手段研究了FER含量对PLA/PBS共混体系的动态流变行为和相容性的影响。结果表明：当应变(γ)小于30%时动态模量不随γ的变化而变化,共混体系表现出线性黏弹行为;当γ大于30%后动态模量明显降低,出现了“Payne”效应。FER能改善PLA/PBS共混体系的加工性能;PLA/PBS共混体系有两个不同的驰豫过程,使曲线出现两个明显的半圆弧,加入FER后PLA和PBS两相的形态发生了改变;当FER含量为0.3 phr时共混体系的Han曲线与vGP曲线重叠,表明PLA和PBS的相容性较好;当FER含量为0.3 phr时PLA与PBS的界面黏附性最佳,表明PLA与PBS具有最为理想的界面相容性;FER添加量为0.3 phr时共混物的拉伸强度和冲击强度分别达到最大值56.9 MPa和4.33 kJ/m²,比PLA/PBS共混物提高了11.2%和37.0%。

关键词 ：有机高分子材料, 聚乳酸, 相容性, 流变行为, 环氧呋喃树脂

Abstract：

Poly(lactic acid)/epoxy furan resin/poly (butylene succinate) (PLA/FER/PBS) blends with different epoxy furan resin (FER) content were prepared by melt blending, while the effect of FER content on the dynamic rheological behavior and compatibility of the PLA/PBS blends was investigated by means of rotary rheometer, scanning electron microscopy (SEM) and universal testing machine. Results show that when the strain (γ) is less than 10%, the dynamic modulus does not change with the change of γ and the blends show linear viscoelastic behavior; when γ is more than 10%, the dynamic modulus decrease obviously, showing the "Payne" effect; FER can improve the processing properties of PLA/PBS blends;PLA/PBS blends have two different relaxation processes, the relevant curves have two distinct half arc, PLA and PBS phase morphology changed with the addition of FER; the time- and temperature-superposition-curves show that for PLA/PBS blends with FER content of 0.3 phr, of which, the Han-curves and vGP-curves of the blends present good overlap, implying the compatibility between PLA and PBS is good; the interface adhesion between PLA and PBS is the best, and the PLA and PBS has the most ideal interfacial compatibility; the tensile strength and impact strength of the blends reached the maximum value of 56.9 MPa and 4.33 kJ/m², which is 11.2% and 37% higher than that of the simple PLA/PBS blends, respectively.

Key words： organic polymer materials poly(lactic acid) compatibility rheological behavior epoxy furan resin

收稿日期: 2017-11-07

ZTFLH:

TQ320

基金资助:国家自然科学基金(51563002),贵州省“百层次”创新型人才项目黔科合平台人才([2016]5653)

作者简介:

作者简介朱大勇,男,1992年生,硕士生

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图1 环氧呋喃树脂的红外谱图

图2 FER与PLA/PBS反应方程式

表1 不同FER质量比的PLA/FER/PBS共混材料配比

图3 不同FER含量的PLA /FER /PBS共混体系的储能模量和损耗模量与应变的关系

图4 不同FER含量的PLA/FER/PBS共混体系复数黏度和频率变化曲线

图5 不同FER含量的PLA/FER/PBS共混体系的储能模量和损耗模量与频率变化曲线

表2 不同FER质量比的PLA/FER/PBS共混材料在低频区的斜率值

图6 不同FER含量的PLA/FER/PBS共混体系的Cole-Cole曲线

图7 不同FER含量的PLA /FER /PBS共混体系在不同温度下的Han曲线

图8 不同FER含量的PLA/FER/PBS共混体系在不同温度下的vGP曲线

图9 不同FER含量的PLA/FER/PBS共混物的微观形貌

图10 不同FER含量的PLA/FER/PBS共混物的机械性能

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