Impact property enhancement of poly (lactic acid) with different flexible copolymers

2015 Global Conference on Polymer and Composite Materials

材料科学;化学

Likittanaprasong, N.^1 ; Seadan, M.^2 ; Suttiruengwong, S.^1

Department of Materials Science and Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Sanamchandra Palace Campus, Nakhon Pathom

73000, Thailand^1

Department of Physics, Faculty of Science, Silpakorn University, Sanamchandra Palace Campus, Nakhon Pathom

73000, Thailand^2

关键词: Acrylonitrile butadiene styrene;    Elongation at break;    Ethylene acrylic elastomers;    Ethylene vinyl acetates;    Impact property;    Morphological properties;    Poly lactic acid;    Polylactic acids;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/87/1/012069/pdf
DOI  :  10.1088/1757-899X/87/1/012069

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The objective of this work was to improve the impact property of Poly (lactic acid) (PLA) by blending with different copolymers. Six flexible copolymers, namely, acrylonitrile butadiene styrene (ABS) powder, Biomax, polybutyrate adipate co-terephthalate (PBAT), polyether block amide (PEBAX), ethylene-vinyl acetate (EVA) and ethylene acrylic elastomer (EAE), with loading less than 20wt% were used and compared. The rheological, mechanical and morphological properties of samples were investigated by melt flow index, tensile testing, impact testing and scanning electron microscope (SEM), respectively. It was found that PLA added 20wt% EAE showed the highest impact strength (59.5 kJ/m2), which was 22 times higher than neat PLA. The elongation at break was also increased by 12 folds compared to neat PLA. The SEM images showed good interface and distribution for PLA containing 20wt% EAE, 15 phr Biomax and 20 wt% PEBAX.