Enhanced crystallization, thermal properties, and hydrolysis resistance of poly(L-lactic acid) and its stereocomplex by incorporation of graphene nanoplatelets

被引：30

作者：

Girdthep, Sutinee ^{[1
]}

Sankong, Wenuka ^{[2
]}

Pongmalee, Asamaporn ^{[2
]}

Saelee, Tinnakorn ^{[2
]}

Punyodom, Winita ^{[2
,3
]}

Meepowpan, Puttinan ^{[2
]}

Worajittiphon, Patnarin ^{[2
,3
,4
]}

机构：

[1] Silpakorn Univ, Dept Chem, Fac Sci, Amphoe Muang 73000, Nakhon Pathom, Thailand

[2] Chiang Mai Univ, Dept Chem, Fac Sci, Chiang Mai 50200, Thailand

[3] Chiang Mai Univ, Ctr Excellence Mat Sci & Technol, Chiang Mai 50200, Thailand

[4] Chiang Mai Univ, Ctr Excellence Innovat Chem, Fac Sci, Chiang Mai 50200, Thailand

来源：

POLYMER TESTING | 2017年 / 61卷

关键词：

Polylactide; Graphene; Stereocomplex; Nanocomposite; Hydrolytic degradation; Thermal property; CARBON NANOTUBES NANOCOMPOSITES; LARGE-SCALE SYNTHESIS; MECHANICAL-PROPERTIES; POLY(LACTIC ACID); OXIDE NANOCOMPOSITES; NUCLEATING-AGENT; DEGRADATION; POLYLACTIDE; BEHAVIOR; BLENDS;

D O I：

10.1016/j.polymertesting.2017.05.009

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Poly(D-lactic acid) (PDLA) and graphene nanoplatelets were used as nucleating agents for poly(L-lactic acid) (PLLA). The graphene (1 wt%) shows a more pronounced effect than PDLA in facilitating PLLA crystallization. Graphene effect on crystallization of stereocomplex (SC) polylactide is also demonstrated. Although medium molecular weight PLLA was blended with a limited content (1 wt%) of low molecular weight PDLA in the presence of graphene (0.5 phr), SC melting temperature is slightly increased without the use of high molecular weight polylactide pair. Also, optimal graphene content (0.5 phr-1.5 phr) promotes crystallization of PLLA homocrystals in the three-component system (PLLA/PDLA/graphene). Graphene additionally enhances Young's modulus and barrier property to thermal degradation of both PLLA and SC systems. Furthermore, PLLA/graphene is more resistant to hydrolysis than PLLA. Likewise, PLLA/PDLA/graphene is more stable than PLLA/PDLA during hydrolysis. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：229 / 239

页数：11

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