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Combined effect of temperature and thickness on work of fracture parameters of unplasticized PVC film
Author(s) -
Arkhireyeva A.,
Hashemi S.
Publication year - 2002
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10967
Subject(s) - tearing , materials science , necking , composite material , fracture (geology) , atmospheric temperature range , work (physics) , tension (geology) , ultimate tensile strength , thermodynamics , physics
The combined effect of temperature and thickness on the essential work of fracture (EWF) parameters for an unplasticized poly(vinyl chloride) (uPVC) film was investigated using double edge notched tension specimens. It was found that for the range of temperatures (23°C to 60°C) and thicknesses (0.15 mm to 0.40 mm) studied here, specific essential work of fracture ( w e ) was independent of temperature at each thickness but increased with thickness at each temperature. It was found that at each temperature, w e and its yielding ( w e,y ) and necking/tearing components ( w e,nt ), all increased linearly with increasing thickness. However, whilet w e showed no significant variation with respect to temperature, its yielding component ( w e,y ) decreased and its necking/tearing component increased ( w e,nt ) with increasing temperature. It was found that estimated values of w e and its components w e,y and w e,nt via crack opening displacement values were by and large unsatisfactory, being either much higher or lower than the directly measured values.