Interplay between Crystallization and Entanglements in the Amorphous Phase of the Crystal-Fixed Polymer Poly(epsilon-caprolactone)

doi:10.1021/acs.macromol.8b00809

CORC > 化学研究所 > 中国科学院化学研究所

	Interplay between Crystallization and Entanglements in the Amorphous Phase of the Crystal-Fixed Polymer Poly(epsilon-caprolactone)
	Kurz, Ricardo 1; Schulz, Martha 1; Scheliga, Felix 2; Men, Yongfeng 3; Seidlitz, Anne 1; Thurn-Albrecht, Thomas 1; Saalwaechter, Kay 1
刊名	MACROMOLECULES
	2018-08-14
卷号	51 期号:15 页码:5831-5841
ISSN号	0024-9297
DOI	10.1021/acs.macromol.8b00809
英文摘要	This work focuses on the influence of amorphous-phase entanglements on the semicrystalline morphology of poly(epsilon-caprolactone). This polyester is classified as crystal-fixed; i.e., it displays no translational chain dynamics in the crystals. We study a wide range of well-entangled samples with molecular weights up to several million using polarization microscopy to assess the lamellar growth rate, small-angle X-ray scattering and proton time-domain NMR to characterize the morphology, and proton multiple-quantum NMR, auxiliary carbon-13 NMR, rheology, and tensile deformation to assess the entangled chain dynamics in the melt and semicrystalline states. We demonstrate a significant increase in the density of entanglements in the amorphous phase relative to the melt. The dependencies of our observables on crystallization temperature and molecular weight suggest that entanglements control the thickness of the amorphous layers. This is rationalized by an only slowly relaxing exclusion zone with enhanced entanglement density acting as an entropically repulsive layer between adjacent lamellae.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000442185700038
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/42457]
专题	中国科学院化学研究所
通讯作者	Saalwaechter, Kay
作者单位	1.Martin Luther Univ Halle Wittenberg, Inst Phys, D-06099 Halle, Germany 2.Univ Hamburg, Inst Tech & Makromol Chem, Bundesstr 45, D-20146 Hamburg, Germany 3.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Renmin St 5625, Changchun 130022, Jilin, Peoples R China
推荐引用方式 GB/T 7714	Kurz, Ricardo,Schulz, Martha,Scheliga, Felix,et al. Interplay between Crystallization and Entanglements in the Amorphous Phase of the Crystal-Fixed Polymer Poly(epsilon-caprolactone)[J]. MACROMOLECULES,2018,51(15):5831-5841.
APA	Kurz, Ricardo.,Schulz, Martha.,Scheliga, Felix.,Men, Yongfeng.,Seidlitz, Anne.,...&Saalwaechter, Kay.(2018).Interplay between Crystallization and Entanglements in the Amorphous Phase of the Crystal-Fixed Polymer Poly(epsilon-caprolactone).MACROMOLECULES,51(15),5831-5841.
MLA	Kurz, Ricardo,et al."Interplay between Crystallization and Entanglements in the Amorphous Phase of the Crystal-Fixed Polymer Poly(epsilon-caprolactone)".MACROMOLECULES 51.15(2018):5831-5841.