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Molecular mobility in rubbers (Record no. 63208)

MARC details
000 -LEADER
fixed length control field	01344nam a2200145Ia 4500
100 ## - MAIN ENTRY--AUTHOR NAME
Personal name	Allen Geoffrey
245 #0 - TITLE STATEMENT
Title	Molecular mobility in rubbers
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Name of publisher	Journal of Natural Rubber Research
Year of publication	1986
300 ## - PHYSICAL DESCRIPTION
Number of Pages	51-57
520 ## - SUMMARY, ETC.
Summary, etc	Neutron beams be obtained in pulsed beams of virtually monchromatic character at wavelengths of about 5 A. The momentum associated with the beam is high and the energy low. Thus neutrons are ideal for studying the diffulsional motions of liquids in scattering experiments. In the past ten years, neutron scattering has been used to determine the average dimensions of individual chains in bulk rubbers and plastics, to study the dynamics of polymer chains in raw rubbers and melts and cross-linked networks and to measure the rotation of side groups. Results show that the Rouse model of molecular chain dynamics is more appropriate than the Zimm model for rubber. In networks, the sections of chain between cross-links from essentially the same chain motion as in the raw rubber, but the junction joints move more slowly. The energy barrier to internal rotation of the methyl side groups in polypropylene oxide is found to be approximately 15 kJ mol-1 in line with the expected value.
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Molecular mobility
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Rubber
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type	Journals

Holdings
Withdrawn status	Lost status	Damaged status	Not for loan	Home library	Current library	Shelving location	Date acquired	Serial Enumeration / chronology	Koha item type
			Journals	RRII Library	RRII Library	Rubber general	17/12/2021	Volume 1, Issue 1	Journals