Understanding the role of kinetic parameters on the crystallization of miscible semicrystalline polymer blends
This dissertation discusses results of crystallization kinetic, morphology and scattering studies on miscible semi crystalline blends of poly(pivalolactone)/ poly(vinylidene fluoride)(pPVLIPVF₂) and poly(pivalolactone)/poly(vinylidene fluoride <i>co</i>- tetrafluoroethylene)(95-5) (PPVL/...
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ndltd-VTETD-oai-vtechworks.lib.vt.edu-10919-403122021-04-24T05:40:02Z Understanding the role of kinetic parameters on the crystallization of miscible semicrystalline polymer blends Huang, Jiang Chemistry Marand, Hervé L. Gibson, Harry W. Riffle, Judy S. Wightman, James P. Wilkes, Garth L. Miscible Polymer Blends Poly(vinylidenc fluoride) Poly(pivalolactone) LD5655.V856 1995.H835 This dissertation discusses results of crystallization kinetic, morphology and scattering studies on miscible semi crystalline blends of poly(pivalolactone)/ poly(vinylidene fluoride)(pPVLIPVF₂) and poly(pivalolactone)/poly(vinylidene fluoride <i>co</i>- tetrafluoroethylene)(95-5) (PPVL/P(VF2-TFE)(95-5)) prepared by solution blending. The spherulitic growth rates of the α-phase PPVL from miscible blends with PVF₂ or P(VF₂- TFE)(95-5) were measured by polarized optical microscopy as a function of blend composition and isothermal crystallization temperature, Tx, between 160°C and 215.5°C. The PPVL weight fraction in the blends ranged from 100 to 10 wt%. Using the Lauritzen-Hoffman kinetic theory of polymer crystal growth, the equilibrium melting temperatures of the α-phase PPVL in both the PPVL/PVF₂ and the PPVL/P(VF₂-TFE)(95-5) blends have been determined, for the first time, directly from the spherulitic growth rate data. Analysis of the composition dependence of the nucleation constant, Kg suggests that the α-phase PPVL crystal/melt lateral interface free energy, Ï , in the blends decreases markedly with increasing PVF₂ or P(VF₂-TFE)(95-5) concentration. Ph. D. 2014-03-14T21:23:04Z 2014-03-14T21:23:04Z 1995-08-05 2005-11-10 2005-11-10 2005-11-10 Dissertation Text etd-11102005-141118 http://hdl.handle.net/10919/40312 http://scholar.lib.vt.edu/theses/available/etd-11102005-141118/ en OCLC# 34348067 LD5655.V856_1995.H835.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ xiii, 167 leaves BTD application/pdf application/pdf Virginia Tech |
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Miscible Polymer Blends Poly(vinylidenc fluoride) Poly(pivalolactone) LD5655.V856 1995.H835 |
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Miscible Polymer Blends Poly(vinylidenc fluoride) Poly(pivalolactone) LD5655.V856 1995.H835 Huang, Jiang Understanding the role of kinetic parameters on the crystallization of miscible semicrystalline polymer blends |
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This dissertation discusses results of crystallization kinetic, morphology and scattering studies on miscible semi crystalline blends of poly(pivalolactone)/ poly(vinylidene fluoride)(pPVLIPVF₂) and poly(pivalolactone)/poly(vinylidene fluoride <i>co</i>- tetrafluoroethylene)(95-5) (PPVL/P(VF2-TFE)(95-5)) prepared by solution blending. The spherulitic growth rates of the α-phase PPVL from miscible blends with PVF₂ or P(VF₂- TFE)(95-5) were measured by polarized optical microscopy as a function of blend composition and isothermal crystallization temperature, Tx, between 160°C and 215.5°C. The PPVL weight fraction in the blends ranged from 100 to 10 wt%. Using the Lauritzen-Hoffman kinetic theory of polymer crystal growth, the equilibrium melting temperatures of the α-phase PPVL in both the PPVL/PVF₂ and the PPVL/P(VF₂-TFE)(95-5) blends have been determined, for the first time, directly from the spherulitic growth rate data. Analysis of the composition dependence of the nucleation constant, Kg suggests that the α-phase PPVL crystal/melt lateral interface free energy, Ï , in the blends decreases markedly with increasing PVF₂ or P(VF₂-TFE)(95-5) concentration. === Ph. D. |
author2 |
Chemistry |
author_facet |
Chemistry Huang, Jiang |
author |
Huang, Jiang |
author_sort |
Huang, Jiang |
title |
Understanding the role of kinetic parameters on the crystallization of miscible semicrystalline polymer blends |
title_short |
Understanding the role of kinetic parameters on the crystallization of miscible semicrystalline polymer blends |
title_full |
Understanding the role of kinetic parameters on the crystallization of miscible semicrystalline polymer blends |
title_fullStr |
Understanding the role of kinetic parameters on the crystallization of miscible semicrystalline polymer blends |
title_full_unstemmed |
Understanding the role of kinetic parameters on the crystallization of miscible semicrystalline polymer blends |
title_sort |
understanding the role of kinetic parameters on the crystallization of miscible semicrystalline polymer blends |
publisher |
Virginia Tech |
publishDate |
2014 |
url |
http://hdl.handle.net/10919/40312 http://scholar.lib.vt.edu/theses/available/etd-11102005-141118/ |
work_keys_str_mv |
AT huangjiang understandingtheroleofkineticparametersonthecrystallizationofmisciblesemicrystallinepolymerblends |
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