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

doi:10.1021/ma051928k

CORC > 化学研究所 > 中国科学院化学研究所

	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
	2006-04-18
卷号	39 期号:8 页码:2930-2939
ISSN号	0024-9297
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.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000236996200029
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/43993]
专题	中国科学院化学研究所
通讯作者	Wang, ZG
作者单位	1.Chinese Acad Sci, Joint Lab Polymer Sci & Mat, CAS, Key Lab Engn Plast,Inst Chem, Beijing 100080, Peoples R China 2.Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA 3.SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA 4.Peking Univ, Coll Chem & Mol Engn, Dept Polymer Sci & Engn, Beijing 100871, Peoples R China
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,2006,39(8):2930-2939.
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,39(8),2930-2939.
MLA	Wang, ZG,et al."Lamellar formation and relaxation in simple sheared poly(ethylene terephthalate) by small-angle X-ray scattering".MACROMOLECULES 39.8(2006):2930-2939.