Effect of Lignin Plasticization on Physico-Mechanical Properties of Lignin/Poly(Lactic Acid) Composites

被引：36
|
作者：
Park, Chan-Woo [1 ]
Youe, Won-Jae [1 ,2 ]
Kim, Seok-Ju [2 ]
Han, Song-Yi [1 ]
Park, Ji-Soo [1 ]
Lee, Eun-Ah [1 ]
Kwon, Gu-Joong [3 ]
Kim, Yong-Sik [1 ]
Kim, Nam-Hun [1 ]
Lee, Seung-Hwan [1 ]
机构：
[1] Kangwon Natl Univ, Coll Forest & Environm Sci, Chunchon 24341, South Korea
[2] Natl Inst Forest Sci, Div Wood Chem, Seoul 02455, South Korea
[3] Kangwon Natl Univ, Kangwon Inst Inclus Technol, Chunchon 24341, South Korea
来源：
POLYMERS | 2019年 / 11卷 / 12期
基金：
新加坡国家研究基金会;
关键词：
lignin composite; twin-screw extrusion; plasticization; coupling agent; KRAFT LIGNIN; PLA; BIOCOMPOSITES; HYBRID; WOOD;
D O I：
10.3390/polym11122089
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Kraft lignin (KL) or plasticized KL (PKL)/poly(lactic acid) (PLA) composites, containing different lignin contents and with and without the coupling agent, were prepared in this study using twin-screw extrusion at 180 degrees C. Furthermore, epsilon-caprolactone and polymeric diphenylmethane diisocyanate (pMDI) were used as a plasticizer of KL and a coupling agent to improve interfacial adhesion, respectively. It was found that lignin plasticization improved lignin dispersibility in the PLA matrix and increased the melt flow index due to decrease in melt viscosity. The tensile strength of KL or PKL/PLA composites was found to decrease as the content of KL and PKL increased in the absence of pMDI, and increased due to pMDI addition. The existence of KL and PKL in the composites decreased the thermal degradation rate against the temperature and increased char residue. Furthermore, the diffusion coefficient of water in the composites was also found to decrease due to KL or PKL addition.
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页数：12
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