Crystalline structures of poly(L-lactide) formed under pressure and structure transitions with heating

	Crystalline structures of poly(L-lactide) formed under pressure and structure transitions with heating
	Huang SY ; Li HF ; Yu DH ; Jiang SC ; Chen XS ; An LJ
刊名	crystengcomm
	2013
卷号	15 期号:21 页码:4372-4378
关键词	EXTENDED-CHAIN CRYSTALS ISOTHERMAL CRYSTALLIZATION ABSORBABLE POLY(GLYCOLIDE) MELTING BEHAVIOR UNIFIED THEORY POLYETHYLENE PHASE MORPHOLOGY POLYMERS GROWTH
ISSN号	1466-8033
通讯作者	huang sy
中文摘要	the isothermally crystallized poly(l-lactide) (plla) samples were obtained at 135 degrees c under pressures (pc) ranging from 1 bar to 2.5 kbar. the crystalline structures, the structure transition, and thermal properties of the prepared samples were investigated by wide-angle x-ray diffraction (waxd), real time synchrotron small-angle x-ray scattering (sr-saxs) and differential scanning calorimetry (dsc) during this process. the structural parameters, such as the size of crystallites, the inverse spacing, the long periods and lamellae thicknesses decrease with pressure increasing. based on the peculiarities of crystalline structure and crystallization behaviors, low and high pressure regions were revealed: disordered alpha crystal was formed in the high pressure region (>1 kbar). a layer located intermediate between crystalline and melt-like regions was observed, which finally took on crystalline order. reformation, disorder to order transformation, and recrystallization during heating completely changed the previous crystalline and stacking structure, a more stable crystalline structure was newly formed. the melting behaviors of samples indicate the crystalline and stacking structure formed under high pressure are more stable. operation of lateral growth and thickness growth can explain well the influence of pressure on the structure, stability and the disorder to order transformation.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000318562900018
公开日期	2014-04-18
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/50290]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Huang SY,Li HF,Yu DH,et al. Crystalline structures of poly(L-lactide) formed under pressure and structure transitions with heating[J]. crystengcomm,2013,15(21):4372-4378.
APA	Huang SY,Li HF,Yu DH,Jiang SC,Chen XS,&An LJ.(2013).Crystalline structures of poly(L-lactide) formed under pressure and structure transitions with heating.crystengcomm,15(21),4372-4378.
MLA	Huang SY,et al."Crystalline structures of poly(L-lactide) formed under pressure and structure transitions with heating".crystengcomm 15.21(2013):4372-4378.