On the correlation of some theoretical and experimental parameters in polycondensation cross-linked networks

摘要: The use of the equation f = km/αE, correlating number degrees freedom m polymer segments between cross-linking nodes in polycondensation networks to energy interaction segment/polymer segment, both within same and at different polymers interfaces, through measures deflection bending by dynamic thermomechanical analysis, yields a consequences interest field polycondensation-hardened their process hardening. From this equation, regression equations only two parameters are obtained, which render easier determination that more difficult or lengthy obtain experimental means. networking, hence reaction gel point complete hardening network, can be followed average obtained these equations. Even Carrothers adapted describe course after up stable networking. dependence from temperature connected rate constant advancement network correlation value system its glass transition temperature. Peculiarities forecasting Flory's Carrothers' theories, depend on well-known existence reactions cyclization during thermodynamic not previously recognized, indicate predicted each theory fails consider one effects for theory. On theoretical basis, combination theories into single, simple still used with ease applied level, leads much better precision than any is derived complex field. © 1996 John Wiley & Sons, Inc. J Appl Polym Sci 63: 603–617, 1997