Cellular morphology evolution in nanocellular poly (lactic acid)/ thermoplastic polyurethane blending foams in the presence of supercritical N-2

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Cellular morphology evolution in nanocellular poly (lactic acid)/ thermoplastic polyurethane blending foams in the presence of supercritical N-2
	Qu, Zhongjie ; Yin, Dexian ; Zhou, Hongfu ; Wang, Xiangdong ; Zhao, Shan
刊名	EUROPEAN POLYMER JOURNAL
	2019-07
卷号	116 页码:291-301
关键词	Poly (lactic acid) Thermoplastic polyurethane Nanofoams Complex cellular structure Supercritical N-2
ISSN号	0014-3057
英文摘要	Currently, the formation of nanocells and complex cellular structure (CCS) in semi-crystalline polymer using supercritical fluids as blowing agent had become a big and newly developing challenge worldwide. In this paper, a facile methodology of polymer blending and batch foaming was proposed to fabricate CCS with large cells in micro-size and small cells in nano-size in semi-crystalline poly (lactic acid) (PLA) foams. Thermoplastic polyurethane (TPU) was introduced into PLA through melt mixing method to improve the viscoelasticity and foaming behaviors of PLA. Differential scanning calorimetry results showed that with the addition of TPU, the cold crystallization temperature of various PLA samples increased and their crystallinity kept unchanged almost. Compared with those of pure PLA, the complex viscosity, and storage modulus of PLA/TPU blends increased. Interestingly, with the increasing TPU content, the CCS appeared and became distinct in PLA/TPU blending foams as well as the thermal conductivity of various PLA foams decreased, respectively. The formation mechanism of CCS in nanocellular PLA/TPU blending foams was proposed and explained by schematic diagram. With the foaming temperature rising from 135 to 140 degrees C, a transition from nano-cells to micro-cells was also observed in PLA/TPU 5 blending foam, due to the decreased melt viscosity.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42913]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
作者单位	1.Beijing Key Lab Qual Evaluat Technol Hyg & Safety, Beijing 100048, Peoples R China 2.Beijing Technol & Business Univ, Sch Mat & Mech Engn, 11 Fucheng Rd, Beijing 100048, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100085, Peoples R China 4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Qu, Zhongjie,Yin, Dexian,Zhou, Hongfu,et al. Cellular morphology evolution in nanocellular poly (lactic acid)/ thermoplastic polyurethane blending foams in the presence of supercritical N-2[J]. EUROPEAN POLYMER JOURNAL,2019,116:291-301.
APA	Qu, Zhongjie,Yin, Dexian,Zhou, Hongfu,Wang, Xiangdong,&Zhao, Shan.(2019).Cellular morphology evolution in nanocellular poly (lactic acid)/ thermoplastic polyurethane blending foams in the presence of supercritical N-2.EUROPEAN POLYMER JOURNAL,116,291-301.
MLA	Qu, Zhongjie,et al."Cellular morphology evolution in nanocellular poly (lactic acid)/ thermoplastic polyurethane blending foams in the presence of supercritical N-2".EUROPEAN POLYMER JOURNAL 116(2019):291-301.