High-strain shape memory polymer networks crosslinked by SiO2

CORC > 兰州化学物理研究所 > 中国科学院兰州化学物理研究所 > 固体润滑国家重点实验室

	High-strain shape memory polymer networks crosslinked by SiO2
	Wang TM(王廷梅); Wang C(王超); Wang QH(王齐华); Wang QH(王齐华)
刊名	Journal of Materials Chemistry
	2011
卷号	21 页码:9073-9078
ISSN号	0959-9428
通讯作者	王齐华
中文摘要	We addressed a novel high-strain shape memory polymer network constructed from SiO2 microspheres core functionalized with polycaprolactone arms. Using abundant surface hydroxyl of silica, epsilon- caprolactone was initiated and uniform SiO2@PCL macroparticles were formed; after cross-linking of SiO2@PCL by MDI, a high-strain shape memory polymer network of SiO2–SMP was obtained. Compared to traditional SMP having similar composition, the SiO2–SMP exhibits excellentmechanical strength and good shape memory properties due to the introduction of SiO2 as a cross-linking point. The elastic moduli (E) and tensile strength (sm) of the SiO2–SMP were improved to 500 MPa and 90 MPa, respectively, at room temperature. It could be attributed to the enhancement of the combining force among polymer chains caused by the crosslinking networks, and the rigidity of the polymer owing to the addition of SiO2 as ﬁller. High shape ﬁxing ratios ( 100%) and recovery ratios (more than 95%) were also exhibited for SiO2–SMP from the second circle. The comparatively low recovery ratios were exhibited in the ﬁrst circle; the obvious evidence of the existence of the irreversible bond breakage is attributed to it. Furthermore, the mechanical and shape memory properties could be adjusted by changing the size of silica microspheres and the molecular weight of the PCL.
学科主题	材料科学与物理化学
收录类别	SCI
资助信息	the National Foundation for Distinguished Young Scholars of China (Grant NO.51025517);the innovative group foundation from NSFC (Grant NO.50721062);the National 973 project of China (2007CB607606)
语种	英语
WOS记录号	WOS:000291611600022
公开日期	2012-09-24
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/753]
专题	兰州化学物理研究所_固体润滑国家重点实验室兰州化学物理研究所_先进润滑与防护材料研究发展中心
通讯作者	Wang QH(王齐华); Wang QH(王齐华)
推荐引用方式 GB/T 7714	Wang TM,Wang C,Wang QH,et al. High-strain shape memory polymer networks crosslinked by SiO2[J]. Journal of Materials Chemistry,2011,21:9073-9078.
APA	王廷梅,王超,王齐华,&王齐华.(2011).High-strain shape memory polymer networks crosslinked by SiO2.Journal of Materials Chemistry,21,9073-9078.
MLA	王廷梅,et al."High-strain shape memory polymer networks crosslinked by SiO2".Journal of Materials Chemistry 21(2011):9073-9078.