MORPHOLOGY EVOLUTION IN PTFE AS A FUNCTION OF MELT TIME AND TEMPERATURE I. HIGH MOLECULAR WEIGHT SINGLE- AND MULTI-MOLECULE FOLDED CHAIN SINGLE CRYSTALS AND BAND STRUCTURES

J. Yang; K.L. Petersen; R.A. Williams; P.H. Geil; T.C. Long; P. Xu

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MORPHOLOGY EVOLUTION IN PTFE AS A FUNCTION OF MELT TIME AND TEMPERATURE I. HIGH MOLECULAR WEIGHT SINGLE- AND MULTI-MOLECULE FOLDED CHAIN SINGLE CRYSTALS AND BAND STRUCTURES

Papers | Updated：2021-06-21

- MORPHOLOGY EVOLUTION IN PTFE AS A FUNCTION OF MELT TIME AND TEMPERATURE I. HIGH MOLECULAR WEIGHT SINGLE- AND MULTI-MOLECULE FOLDED CHAIN SINGLE CRYSTALS AND BAND STRUCTURES
- Vol. 23, Issue 2, Pages: 123-135(2005)
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- Published：20 March 2005
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J. Yang, K.L. Petersen, R.A. Williams, et al. MORPHOLOGY EVOLUTION IN PTFE AS A FUNCTION OF MELT TIME AND TEMPERATURE I. HIGH MOLECULAR WEIGHT SINGLE- AND MULTI-MOLECULE FOLDED CHAIN SINGLE CRYSTALS AND BAND STRUCTURES[J]. 2005, 23(2): 123-135.
DOI：

J. Yang, K.L. Petersen, R.A. Williams, et al. MORPHOLOGY EVOLUTION IN PTFE AS A FUNCTION OF MELT TIME AND TEMPERATURE I. HIGH MOLECULAR WEIGHT SINGLE- AND MULTI-MOLECULE FOLDED CHAIN SINGLE CRYSTALS AND BAND STRUCTURES[J]. 2005, 23(2): 123-135. DOI：

摘要

The effect of sintering dispersed dispersion and nano-emulsion particles of high molecular weight polytetrafluoroethylene (PTFE) on a substrate as a function of “melt” time and temperature is described. Folded chain single crystals parallel to the substrate and as ribbons on-edge (with double striations)

as well as bands

are produced for longer sintering times; particle merger and diffusion of individual molecules

crystallizing as folded chain

single (or few) molecule

single crystals when “trapped” on the substrate by cooling occur for shorter sintering times. It is suggested the observed structures develop with sintering time

in a mesomorphic melt. The structure of the nascent particles is also discussed.

Abstract

as well as bands

are produced for longer sintering times; particle merger and diffusion of individual molecules

crystallizing as folded chain

single (or few) molecule

single crystals when “trapped” on the substrate by cooling occur for shorter sintering times. It is suggested the observed structures develop with sintering time

in a mesomorphic melt. The structure of the nascent particles is also discussed.

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