Crystallinity as a selection criterion for engineering properties of high-density polyethylene

Conference · Fri Jan 01 04:00:00 EST 1982

OSTI ID:5036043

Hoffman, D M; McKinley, B M

Based on DSC measurements of T/sub m/ and ..delta..H/sub f/, eight polyethylenes of 0.96 g/cc calculated density were selected from 25 commercial HDPEs for further comparison of their properties against four design requirements. According to preliminary results from thermal expansion and creep measurements, DSC studies correctly predict the HDPE samples with superior design required properties. Clearly, the DSC was useful for screening and studying HDPE crystallization, the polymer crystal being the major physical structure responsible for improvement in three of the four design required properties. The Avrami equation proved useful for evaluating the overall crystallization kinetics of the HDPE specimens selected for their high crystallinity and melting point.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5036043
• Report Number(s): UCRL-86894; CONF-820809-4; ON: DE82020496
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360404* -- Materials-- Polymers & Plastics-- Physical Properties-- (-1987)
COMPARATIVE EVALUATIONS
CREEP
DENSITY
EXPANSION
MECHANICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
POLYETHYLENES
POLYMERS
POLYOLEFINS
THERMAL EXPANSION