MELTING OF POLYMERS,

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Abstract:

This report presents a general discussion of polymer melting. Equilibrium crystals of polymers in the form of extended chain crystals are found to follow equilibrium thermodynamics only when heated slowly. On faster experimentation superheating results. Most polymer crystals are metastable folded chain crystals which reorganize badly on heating. Time dependent melting studies are necessary to evaluate the different polymer crystal morphologies. A more detailed discussion of polyethylene, polyoxymethylene, polytetrafluoroethylene, and polycaprolactam is given. Melting point variations are shown to cover as much as 200 C. Author

Author(s):
Wunderlich, Bernhard
Author Organization(s):
RENSSELAER POLYTECHNIC INST TROY NY DEPT OF CHEMISTRY
Descriptive Note:
Technical rept.,
Pagination:
0017

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-12
Contract/Grant Number(s):
Nonr-591(19)
Project Number(s):
NR-051-428
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*POLYMERS, MELTING POINT), THERMODYNAMICS, MELTING, POLYETHYLENE PLASTICS, SINGLE CRYSTALS, FLUORINE COMPOUNDS, ENTROPY, RECRYSTALLIZATION, OXIDES, STYRENE PLASTICS, ACETAL RESINS, NYLON, CRYSTAL STRUCTURE
Field(s)/Group(s):
Physical Chemistry
Report Date:
1967 Jan 30