Study on a Parameter to Express Glass-Forming Relationship of Phenolic-Novolac Resin

摘要

Chemoviscosity and glass-forming ability of commercial phenolic-novolac resin are investigated at hexame-thylenetramine (HMTA) curing agent content weight from 6 to 9%. We propose a parameter, M_k, which is based on chemoviscosity change rate and T_(gO) of uncured liquid resin, to predict glass-forming ability of the fully cured phenolic-novolac resin. It is found that M_k has a negative linear relationship with T_(g∞), and the lower M_k represents the better glass-forming ability of initial phenolic-novolac uncured liquid resin while the higher T_(g∞) represents the better glass-forming ability of fully cured resin. Further more, M_k establishes a kinetic glass-forming relationship between liquid uncured and fully cured phenolic-novolac resin in terms of comparing with T_(g∞).