β-环糊精对长支链化聚乳酸复合材料发泡质量及力学性能的影响

doi:10.11896/cldb.19030194

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Abstract The effect of the dosage of ADR on the comprehensive performance of PLA was studied by using styrene-glycidyl acrylate copolymer (ADR) as chain extender, and the effect of β-cyclodextrin (BC) on the foaming quality and mechanical properties of PLA foaming composite was also discussed by gelpermeation chromatography (GPC) and differential calorimeter (DSC) and other methods. The results showed that adding 0.5% (mass fraction, the same below) of ADR making the molecular weight of the modified PLA increased from 2.2×10⁵ g/mol to 2.61×10⁵ g/mol, relative molecular mass distribution of the modified PLA increased to 4.23, the melt viscosity was improved obviously. When BC was added into the long branched PLA for foaming, it was found that 5% BC could obtain the ideal modified PLA composite cell structure, with the average diameter of the cell reaching 28.8 μm. When the BC content reached 3%, the bending, stretching and impact strength of the foaming long-branched PLA/BC composite increased by 9.1%, 14.3% and 52.3%, respectively, compared with the pure PLA foaming composite.

Key words： chain extender long branches chain mechanical properties foaming

Published: 24 July 2020

CLC number:

TB324

Fund:This work was financially supported by Guizhou Province, One Hundred-level Personnel Items(Guizhou Branch of talent [2016] No. 5673),Guizhou Province Scientific Research Institutions Serving Corporate Actions Projects(Guizhou branch of service enterprises [2018] No. 4010).

About author:: Fei Zhang, studying for a master’s degree in enginee-ring at the School of Materials and Metallurgy, Guizhou University since Sep.2017. He is mainly engaged in polymer foaming research.
Wei Gong, master tutor, mainly engaged in the research of polymer material structure and properties, polymer blend modification and so on. He has published 69 academic papers in International Polymer Proces-sing, Journal of Applied Polymer Science, Polymer Materials Science and Engineering and other academic journals as the first author or corresponding author. At pre-sent, he is an expert with special allowance from Guizhou government, a talent of “100” level in Guizhou province, and an outstanding young scientific and technological ta-lent in Guizhou province. Four scientific and technological achievements have been transformed and applied, having a certain capacity of scientific and technological innovation.

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	ZHANG Fei
	ZHOU Yuhui
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Cite this article:

ZHANG Fei,ZHOU Yuhui,ZHANG Heng, et al. Effect of β-Cyclodextrin on Foaming Quality and Mechanical Properties of Long-branched Polylactic Acid Composite[J]. Materials Reports, 2020, 34(16): 16155-16160.

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http://www.mater-rep.com/EN/10.11896/cldb.19030194 OR http://www.mater-rep.com/EN/Y2020/V34/I16/16155

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