Thermal, Mechanical and Barrier Properties of PBAT/PLLA Blend Films

doi:10.19491/j.issn.1001-9278.2019.09.007

China Plastics ›› 2019, Vol. 33 ›› Issue (9): 41-45,139.DOI: 10.19491/j.issn.1001-9278.2019.09.007

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Thermal, Mechanical and Barrier Properties of PBAT/PLLA Blend Films

WANG Limei^1,2, TU Buxin1, YU Yifan¹, LU Yueyuan¹, CHUN Yan¹, DONG Tungalag^1*

1. College of Food Science and Engineering,Inner Mongolia Agricultural University 2. Inner Mongolia Academy of Agricultural ＆Animal Husbandry Sciences

Received:2019-04-18 Revised:2019-06-05 Online:2019-09-26 Published:2019-10-25

Abstract

Abstract: The PBAT/PLLA blend films were prepared by melt extrusion, and the effect of PLLA content on the mechanical, thermal and gas barrier properties of blend films were investigated. The results indicated that the PBAT/PLLA blend system was thermodynamically incompatible. The blend films exhibited a decrease in permeation coefficients of O2 and CO2 with an increase of PLLA content. When 30 wt% of PLLA was incorporated, the blend films achieved the permeation coefficients of 34.2 % and 70.8 %, for O2 and CO2, respectively. The two values were lower than those of pure PBAT films. The permeation coefficient radio of O2/CO2 was found to decrease from 10.20 to 4.52, indicating that the barrier properties of blend films were significantly improved. The addition of PLLA could effectively prevent the deformation and warpage of blends films.

Key words: poly(butylene adipateco-terephthalate); poly(L-lactic acid;blend films, gas permea-bility

CLC Number:

TB383.2

WANG Limei, TU Buxin, YU Yifan, LU Yueyuan, CHUN Yan, DONG Tungalag. Thermal, Mechanical and Barrier Properties of PBAT/PLLA Blend Films[J]. China Plastics, 2019, 33(9): 41-45,139.

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Thermal, Mechanical and Barrier Properties of PBAT/PLLA Blend Films

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