Fabrication of Diaminodiphenylmethane Modified Ammonium Polyphosphate to Remarkably Reduce the Fire Hazard of Epoxy Resins

Release time:2022-02-25

Impact Factor:4.329

DOI number:10.3390/polym13193221

Journal:POLYMERS

Key Words:epoxy resindiaminodiphenylmethaneammonium polyphosphateflame retardancysmoke suppressionmechanical property

Abstract:A novel diaminodiphenylmethane (DDM) modified ammonium polyphosphate (APP) flame retardant, DDP, was successfully synthesized via ion-exchange reaction. DDP was introduced into epoxy resins (EPs) to reduce flammability. A comparable level of DDP exerts better flame-retardant and smoke suppression efficiencies in EP than APP. An EP blend containing 15 wt% DDP displays a limiting oxygen index (LOI) value of 37.1% and a UL 94 V-0 rating, and further exhibits a 32.3% reduction in total heat release and a 48.0% reduction in total smoke production compared with pure EP. The presence of DDP greatly facilitates char formation during combustion, and the char mass from thermal decomposition of an EP blend is 37.8% smaller than that of an EP blend containing 15 wt% DDP at 800 degrees C. The incorporation of DDP into EP blends has a smaller impact on the glass transition temperature and tensile strength than those of a comparable level of APP. This reflects the better compatibility of DDP with the EP matrix compared with that for APP.

First Author:Wang, FY; Liao, JH; Yan, L*; Liu, H

Indexed by:Journal paper

Discipline:Engineering

First-Level Discipline:Safety Science and Engineering

Document Type:J

Volume:13

Issue:19

Page Number:3221

ISSN No.:2073-4360

Translation or Not:no

Date of Publication:2021-11-03

Included Journals:SCI