Title: High Tg Thermosets Based on Ultra -High Functionality Epoxy Novolacs (EPNs)
Authors: Huifeng Qian, Prashanth Badrinarayanan
Abstract: Epoxy phenol novolacs (EPNs) are multifunctional epoxies based on phenol- formaldehyde chemistry. Unlike the typical bisphenol A di-functional liquid epoxy resins, EPNs can achieve much higher functionality (<2). The multifunctionality of EPNs results in highly cross-linked thermosets upon cure, exhibiting high glass transition temperatures (Tg), excellent mechanical properties, and chemical resistance. In this work, we will introduce a novel ultra-high functionality epoxy novolac (i.e., D.E.N.™ 440) with average functionality of ±4.5, which will boost Tg of thermoset while maintaining a balance of other properties such as pot life, reactivity, and viscosity. The effect of this ultra-high functionality EPN on the rheology, cure behavior, and thermo-mechanical properties of several formulations intended for high Tg applications will be explored.
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Conference: SAMPE NEXUS 2021
Publication Date: 2021/06/29
Price: FREEGet This Paper