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Development and processing of flame retardant cellulose acetate compounds for foaming applications
Author(s) -
Breuer Robert,
Zhang Yuxiao,
Erdmann Rafael,
Vernaez Hernandez Oscar Eduardo,
Kabasci Stephan,
Kostka Melanie,
Reinhardt Nicolas,
Facklam Martin,
Hopmann Christian
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48863
Subject(s) - blowing agent , fire retardant , flammability , materials science , extrusion , composite material , expanded polystyrene , cellulose acetate , polystyrene , foaming agent , blow molding , polymer , compression molding , molding (decorative) , ultimate tensile strength , ethyl cellulose , cellulose , chemical engineering , polyurethane , mold , porosity , engineering
Cellulose acetate (CA) is a bio‐based polymeric material suitable to replace foamed polystyrene (PS) boards in applications for building insulation. Foam boards can be produced by extrusion foaming with physical blowing agents. In addition, the high heat deflection temperature and good mechanical properties (e.g., tensile and compression strength) of CA make it suitable for the injection molding of technical parts. In general, flame retardancy of foamed products is often required in building or electronic applications. This article presents the effects of various flame retardant (FR) additives, process settings, and the calibration of the foam board on flammability, foam morphology, and mechanical properties of extruded CA boards. Different formulations of FR additives and foaming agents were investigated regarding density and morphology of the foamed boards. Furthermore, investigations on foam behavior for foam injection molding with physical blowing agents were conducted. The foamed parts were characterized with regard to their flammability. © 2019 The Authors. Journal of Applied Polymer Science published by Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48863.