A new Fourier transformation method for SAXS of polymer lamellar crystals

doi:DOI: 10.1039/ d0ce00157k

CORC > 合肥物质科学研究院 > 中国科学院合肥物质科学研究院 > 中科院固体物理研究所 > 专题未命名

	A new Fourier transformation method for SAXS of polymer lamellar crystals
	Xiangyang Li; Jianjun Ding; Pujing Chen; Kang Zheng; Lin Chen; Xingyou Tian
刊名	crystengcomm
	2020-03-20
卷号	22
ISSN号	1466-8033
DOI	DOI: 10.1039/ d0ce00157k
通讯作者	Li, Xiangyang(xiangyangli@issp.ac.cn)
英文摘要	For a long time, the scattering of semi-crystalline polymers was assumed to be from the electron density correlation in a lamellar stack. The Fourier transform for scattering can help obtain the correlation function and interface distribution function (IDF), from which the structural information can be obtained. Recently, we found that the scattering of the interface electrons involved in an evanescent wave (Iiev) is the actual origin (Li et al., IUCrJ, 2019, 6, 968-983). It is necessary to develop a new Fourier transform method to obtain structural information. In this study, a method similar to the classical method was proposed; nevertheless, the aim of multiplying q(2) or q(4) is to reduce the influence of the form factor, while the scattering in Fourier transform should be Iiev, which is roughly equal to the increased scattering during crystallization. The functions obtained by the Fourier transforms K-ev and are similar to the correlation function and IDF in shape, respectively. Nevertheless, both of them are determined mainly by three items, i.e., the self-interference term of the first interface F-11, the interference term between the first and second interfaces F-12, and the interference term between the first and third interfaces F-13, with no relation with the density correlation. They can give information on the lamellar thickness and long period but not on amorphous thickness since both the "self-correlation region" in the so-called "correlation function" and the first peak in IDF are dominated by F-11, which does not include the parameter of amorphous thickness. With the revised procedure, the lamellar thickness and long period can be obtained readily from real scattering, whether for a lamellar two-phase system or a lamellar system with a broad thickness distribution. Based on the above-mentioned results, we suggest the removal of the concept of correlation function but the retention of IDF. can be regarded as a new IDF, which represents the probability of finding an interface apart from the first interface of a lamellar stack at a distance of Z.
资助项目	National Natural Science Foundation of China[21774133]
WOS关键词	SMALL-ANGLE SCATTERING ; X-RAY-SCATTERING ; FLOW-INDUCED NUCLEATION ; ISOTACTIC POLYPROPYLENE ; WIDE-ANGLE ; CRYSTALLIZATION BEHAVIOR ; SYNDIOTACTIC POLYSTYRENE ; STRUCTURE INFORMATION ; MORPHOLOGICAL-CHANGES ; POLY(L-LACTIC ACID)
WOS研究方向	Chemistry ; Crystallography
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000531356500018
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/42740]
专题	中科院固体物理研究所_专题未命名
通讯作者	Xiangyang Li; Xingyou Tian
作者单位	Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230088,
推荐引用方式 GB/T 7714	Xiangyang Li,Jianjun Ding,Pujing Chen,et al. A new Fourier transformation method for SAXS of polymer lamellar crystals[J]. crystengcomm,2020,22.
APA	Xiangyang Li,Jianjun Ding,Pujing Chen,Kang Zheng,Lin Chen,&Xingyou Tian.(2020).A new Fourier transformation method for SAXS of polymer lamellar crystals.crystengcomm,22.
MLA	Xiangyang Li,et al."A new Fourier transformation method for SAXS of polymer lamellar crystals".crystengcomm 22(2020).