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Prediction of cure time for a rubber cement used for conveyer belt splicing
Author(s) -
Focke W. W.,
Van Eeden G. S.
Publication year - 1991
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.1991.070420304
Subject(s) - isothermal process , composite material , materials science , arrhenius equation , natural rubber , vulcanization , shear rate , cement , shear (geology) , shear strength (soil) , thermodynamics , activation energy , viscosity , chemistry , physics , geology , soil water , soil science
The evolution of bonding strength for a commercial cold vulcanizing rubber cement was determined using small–mscale simulated conveyer belt splicing. Peel and shear data obtained under isothermal conditions fit a modified Avrami model X = 1 − exp(− kt 1/2 ), where X is the degree of ultimate shear or peel bond strength obtained and the rate constant k shows a typical Arrhenius type temperature dependence k = 42 exp(1670/ T ) min 1/2 for peel strength, and k = 57 exp(−2000/ T ) min 1/2 for shear strength. ( T is the absolute temperature in K.) Bonding strength evolution under nonisothermal cure conditions can be estimated by integrating the general rate expression dX / dt = 0.5 k 2 (1 − X )/(−ln[1 − X ]).
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