Significant enhancement of crystallization kinetics of polylactide in its immiscible blends through an interfacial effect from comb-like grafted side chains

	Significant enhancement of crystallization kinetics of polylactide in its immiscible blends through an interfacial effect from comb-like grafted side chains
刊名	SCIENCE CHINA-CHEMISTRY
	2016
卷号	59
关键词	SPHERULITIC GROWTH-RATE LAYER FILM METHOD POLYMER BLENDS PHASE-SEPARATION ISOTACTIC POLYPROPYLENE SEMICRYSTALLINE POLYMERS POLY(ETHYLENE GLYCOL) MECHANICAL-PROPERTIES POLY(L-LACTIC ACID) CARBON NANOTUBES biodegradable polymer spherulite growth rate phase separation nucleation
ISSN号	1674-7291
其他题名	Significant enhancement of crystallization kinetics of polylactide in its immiscible blends through an interfacial effect from comb-like grafted side chains
英文摘要	A significant enhancement in isothermal crystallization kinetics of biodegradable polylactide (PLA) in its immiscible blends can be accomplished through blending it with a comb-like copolymer. PLA was blended with poly(ethylene glycol) methyl ether acrylate (PEGA) and polypoly(ethylene glycol) methyl ether acrylate (PPEGA, a comb-like copolymer), respectively. The results measured from phase contrast optical microscopy (PCOM) and differential scanning calorimetry (DSC) indicate that PLA and PEGA components are miscible, whereas PLA and PPEGA components are immiscible. The study of crystallization kinetics for PLA/PEGA and PLA/PPEGA blends by means of polarized optical microscopy (POM) and DSC indicates that both PEGA and PPEGA significantly increase the PLA spherulitic growth rates, G, although PLA/PPEGA blends are immiscible and the glass transition temperatures of PLA only have slight decreases. PPEGA component enhances nucleation for PLA crystallization as compared with PEGA component owing to the heterogeneous nucleation effect of PPEGA at the low composition of 20 wt%, while PLA crystallization-induced phase separation for PLA/PEGA blend might cause further nucleation at the high composition of 50 wt%. DSC measurement further demonstrates that isothermal crystallization kinetics can be relatively more enhanced for PLA/PPEGA blends than for PLA/PEGA blends. The "abnormal" enhancement in G for PLA in its immiscible blends can be explained by local interfacial interactions through the densely grafted PEGA side chains in the comb-like PPEGA, even though the whole blend system (PLA/PPEGA blends) represents an immiscible one.
资助项目	[National Basic Research Program of China] ; [National Natural Science Foundation of China] ; [Open Research Fund of State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences]
语种	英语
CSCD记录号	CSCD:5712824
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/65421]
专题	中国科学院合肥物质科学研究院
推荐引用方式 GB/T 7714	. Significant enhancement of crystallization kinetics of polylactide in its immiscible blends through an interfacial effect from comb-like grafted side chains[J]. SCIENCE CHINA-CHEMISTRY,2016,59.
APA	(2016).Significant enhancement of crystallization kinetics of polylactide in its immiscible blends through an interfacial effect from comb-like grafted side chains.SCIENCE CHINA-CHEMISTRY,59.
MLA	"Significant enhancement of crystallization kinetics of polylactide in its immiscible blends through an interfacial effect from comb-like grafted side chains".SCIENCE CHINA-CHEMISTRY 59(2016).