PLLA/TPEE/TMC-210三元复合材料的制备及性能研究

doi:10.11896/cldb.18120185

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Abstract In this work, TMC-210 and TPEE substances were selected as modifiers to mediate the crystallization and melting behaviors and mechanical properties of PLLA at different levels by melt blending method, which was mainly aimed at the problem that the crystallization rate of PLLA was too slow and that toughness of PLLA was too poor. The effect of TMC-210 and TPEE on the crystallization and melting behaviors, spherulite morphology, crystal structure, and mechanical properties of the blends were systematically investigated by differential scanning calorimetry (DSC), polarized optical microscopy (POM), X-ray diffraction (XRD), scanning electron microscope (SEM), and mechanical test. It was found that TMC-210 significantly accelerated the crystallization of PLLA in PLLA/TMC-210/TPEE blends. There was no crystal peak, when we added 0.2% (mass ratio) TMC-210 to the PLLA, the crystallization temperature of PLLA increased to 122.2 ℃, and the addition of TMC-210 made the cold crystallization temperature of PLLA disappeared. The test results of XRD showed that the addition of TMC-210 and TPEE had no influence on the crystal structure of PLLA. However, the introduction of TPEE greatly improved the toughness of PLLA,the impact strength of pure PLLA was 3.03 kJ·m^-2, when the TPEE content was 50% (mass ratio), impact strength of PLLA(20.7 kJ·m^-2) was 5.83 times higher than that of pure PLLA.

Key words： polylactic acid elasticity toughness crystallization polymers

Published: 29 May 2020

CLC number:

TQ321.2

Fund:This work was financially supported by the National First-rate Discipline Construction Project of Ningxia (Chemical Engineering and Technology, NXYLXK2017A04).

About author:: Mengmeng Shi received his M.S. degree in June 2018 from Ningxia University in engineering, focusing on the research of Modification of polymer mate-rials. In July 2018, he participated in the work in Yulin Chemical Co., Ltd. of Shaanxi Coal Group, mainly focusing on coal chemical gasification plant.
Faliang Luo, professor, Ningxia University, has published more than 40 papers in domestic and foreign chemical and material related journals, including more than 30 papers included in SCI and EI. 7 Chinese invention patents have been applied and authorized. Research direction: synthesis, processing and application of new materials of coal-based polymer materials and synthesis of carbon dioxide based biopolymers.

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Cite this article:

SHI Mengmeng,LUO Faliang. Preparation and Properties of PLLA/TPEE/TMC-210 Ternary Composite[J]. Materials Reports, 2020, 34(12): 12191-12195.

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http://www.mater-rep.com/EN/10.11896/cldb.18120185 OR http://www.mater-rep.com/EN/Y2020/V34/I12/12191

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