ICCAS OpenIR
Interplay between Crystallization and Entanglements in the Amorphous Phase of the Crystal-Fixed Polymer Poly(epsilon-caprolactone)
Kurz, Ricardo1; Schulz, Martha1; Scheliga, Felix2; Men, Yongfeng3; Seidlitz, Anne1; Thurn-Albrecht, Thomas1; Saalwaechter, Kay1
2018-08-14
Source PublicationMACROMOLECULES
ISSN0024-9297
Volume51Issue:15Pages:5831-5841
AbstractThis 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.
DOI10.1021/acs.macromol.8b00809
Indexed BySCI
Language英语
WOS IDWOS:000442185700038
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/42458
Collection中国科学院化学研究所
Corresponding AuthorSaalwaechter, Kay
Affiliation1.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
Recommended Citation
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.
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