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Instrumented impact testing of castor‐oil‐based polyurethanes
Author(s) -
Liu T. M.,
Bui V. T.
Publication year - 1995
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1995.070560305
Subject(s) - castor oil , brittleness , materials science , isocyanate , composite material , transition temperature , polyurethane , impact energy , chemistry , organic chemistry , superconductivity , physics , quantum mechanics
Instrumented impact testing has been used to study castor‐oil‐based polyurethanes. The energy‐absorbed capacity of these materials in impact is dependent on several factors, such as the type of isocyanate, NCO/OH ratio, and testing temperature. An approximate but simple method for the low‐temperature impact testing was proposed. A change from ductile response to brittle fracture was observed as the temperature of the specimen was reduced. This characteristic ductile‐brittle transition temperature is to be found highly sensitive to crosslinking degree. © 1995 John Wiley & Sons, Inc.