Lamellar formation and relaxation in simple sheared poly(ethylene   terephthalate) by small-angle X-ray scattering

doi:10.1021/ma051928k

CORC > 北京大学 > 化学与分子工程学院

	Lamellar formation and relaxation in simple sheared poly(ethylene terephthalate) by small-angle X-ray scattering
	Wang, ZG ; Xia, ZY ; Yu, ZQ ; Chen, EQ ; Sue, HJ ; Han, CC ; Hsiao, BS
刊名	macromolecules
	2006
关键词	HIGH-DENSITY POLYETHYLENE ANGULAR EXTRUSION PROCESS PLASTIC-DEFORMATION BEHAVIOR AMORPHOUS POLY(ETHYLENE-TEREPHTHALATE) CRITICAL STRAINS DRAWN POLY(ETHYLENE-TEREPHTHALATE) POLYCARBONATE PLATE CRYSTALLIZATION ORIENTATION TEXTURE
DOI	10.1021/ma051928k
英文摘要	Semicrystalline poly(ethylene terephthalate) (PET) was oriented with an equal channel angular extrusion (ECAE) process at room temperature, which applied simple shear deformation and generated unique asymmetric lamellar texture. In-situ small-angle X-ray scattering (SAXS) measurements were utilized to study the changes of lamellar structure during heating in samples with and without experiencing the simple shear deformation. The total scattered intensity, fractions of isotropic and anisotropic scattered intensities, orientation factors, and long periods along different shear directions were determined from 2-dimensional SAXS patterns. Orientation-stable a-lamellae with their normal perpendicular to the shear plane exhibited a larger long period after shear and a rapid decrease in long period upon heating, while less orientation-stable beta-lamellae with their normal perpendicular to the flow direction exhibited a smaller long period after shear but only a slight decrease in long period upon heating. The thermally induced lamellar misorientaton could be attributed to the processes of lamellar relaxation and recrystallization of the amorphous phase. The possible molecular mechanisms for lamellar formation during simple shear are also discussed.; Polymer Science; SCI(E); EI; 19; ARTICLE; 8; 2930-2939; 39
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/252459]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Wang, ZG,Xia, ZY,Yu, ZQ,et al. Lamellar formation and relaxation in simple sheared poly(ethylene terephthalate) by small-angle X-ray scattering[J]. macromolecules,2006.
APA	Wang, ZG.,Xia, ZY.,Yu, ZQ.,Chen, EQ.,Sue, HJ.,...&Hsiao, BS.(2006).Lamellar formation and relaxation in simple sheared poly(ethylene terephthalate) by small-angle X-ray scattering.macromolecules.
MLA	Wang, ZG,et al."Lamellar formation and relaxation in simple sheared poly(ethylene terephthalate) by small-angle X-ray scattering".macromolecules (2006).