Using Structure Property Relationships in the Understanding and Molecular Design of Inherently Tough Polybenzoxazines

摘要

Conventional phenolics are crosslinked products of their low molecular weight precursors, typically formed through a condensation eaction producing by-products (NH3/H2O). Various (relatively nexpensive) structures often display very desirable properties: good heat resistance, flame retardant properties, and low dielectric constants [1], but they have poor toughness properties, display poor shelf life and polymerisation produces by-products and requires, in many cases, the use of a strong acid or base catalyst to effect cure [2]. Furthermore, this highly corrosive medium has the potential to damage processing equipment.