Interaction between the phase separation and flow-induced crystallization process in polyethylene/ethylene-methacrylic acid ionomers (surlyn) blends during the film blowing: An in-situ synchrotron radiation X-ray scattering study

doi:10.1016/j.polymer.2022.124819

	Interaction between the phase separation and flow-induced crystallization process in polyethylene/ethylene-methacrylic acid ionomers (surlyn) blends during the film blowing: An in-situ synchrotron radiation X-ray scattering study
	Ali, Sarmad 1,2; Iqbal, Obaid 1,2; Ding, Shenyi 2; Li, Nian 2; Guo, Hang 1
刊名	POLYMER
	2022-05-06
卷号	248
关键词	Film blowing process Flow-induced crystallization In-situ synchrotron radiation SAXS/WAXS measurements
ISSN号	0032-3861
DOI	10.1016/j.polymer.2022.124819
通讯作者	Guo, Hang(hguo1@ustc.edu.cn)
英文摘要	A homemade blown film methodology simultaneously coupled with in-situ synchrotron radiation small and wideangle X-ray scattering (SAXS and WAXS) measurement was assisted to investigate the immiscibility (phase separation) mingled with the flow-induced crystallization of the polyethylene (PE)/surlyn blends during the film blowing process. The whole process is studied within three different regions (I, II, and III) of the bubble along the take-up direction, where the microstructure and temperature evolutions exhibit significantly distinct behaviors. In the SAXS patterns, the equatorial streak signal in the vicinity of the die exit indicates the phase separation among the different polymer components, which is in particular strong in blends consisting of both PE (blends of LDPE, LLDPE, and co-ethylene) and surlyn. The equatorial streak signal attenuates progressively but remains obvious within Region I. The disappearance of phase separation induced by strong flow is an exothermic process, which suppresses the cross-linked crystal network formation prior to the frost line (A(f)) within Region II. After the frost line, the main structural evolution is the formation of the non-deformable scaffold during the completion of crystallization along the bubble. It is found that the initial phase separation shows a limited influence on the final structure of the cross-linked crystal network, the effect of phase separation on the crystallization in Region I is eliminated due to the flow field and sufficient crystallization time ultimately. This work should be supportive for extended study and understanding of the structural evolutions of polymer blends during the film blowing.
资助项目	National Key R & D Program of China[2018YFB0704200] ; CAS-TWAS
WOS关键词	DENSITY POLYETHYLENE ; MECHANICAL-PROPERTIES ; BARRIER PROPERTIES ; MORPHOLOGY ; NANOCOMPOSITES ; POLYPROPYLENE ; NUCLEATION ; ETHYLENE
WOS研究方向	Polymer Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000806158900003
资助机构	National Key R & D Program of China ; CAS-TWAS
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131215]
专题	中国科学院合肥物质科学研究院
通讯作者	Guo, Hang
作者单位	1.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Anhui Prov Engn Lab Adv Funct Polymer Film, CAS Key Lab Soft Matter Chem, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Solid State Phys, Hefei 230031, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Ali, Sarmad,Iqbal, Obaid,Ding, Shenyi,et al. Interaction between the phase separation and flow-induced crystallization process in polyethylene/ethylene-methacrylic acid ionomers (surlyn) blends during the film blowing: An in-situ synchrotron radiation X-ray scattering study[J]. POLYMER,2022,248.
APA	Ali, Sarmad,Iqbal, Obaid,Ding, Shenyi,Li, Nian,&Guo, Hang.(2022).Interaction between the phase separation and flow-induced crystallization process in polyethylene/ethylene-methacrylic acid ionomers (surlyn) blends during the film blowing: An in-situ synchrotron radiation X-ray scattering study.POLYMER,248.
MLA	Ali, Sarmad,et al."Interaction between the phase separation and flow-induced crystallization process in polyethylene/ethylene-methacrylic acid ionomers (surlyn) blends during the film blowing: An in-situ synchrotron radiation X-ray scattering study".POLYMER 248(2022).