Premium
Propargylated novolac resins for fibre‐reinforced plastics: Processing aspects
Author(s) -
Bulgakov Boris,
Kalugin Denis,
Babkin Alexander,
Makarenko Irina,
Malakho Artem,
Kepman Alexey,
Avdeev Victor,
Garadja Nikita,
Rogozin Alexey
Publication year - 2016
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.22354
Subject(s) - curing (chemistry) , materials science , composite material , char , porosity , overheating (electricity) , polymer , composite number , formaldehyde , catalysis , pyrolysis , chemical engineering , chemistry , organic chemistry , physics , quantum mechanics , engineering
Propargylated novolac resins (PN) are known polymer binders for fibre‐reinforced plastic production. Unlike common phenolic resins, PNs are able to cure without volatiles, avoiding porosity formation in the final material. Otherwise, PN curing proceeds with a high exothermal effect (up to 1200 J/g), causing overheating that may result in destruction of material and equipment damage. The specific heat release limit was found with a curing kinetic study complemented with mathematical calculations to be 660 J/g for a quick and safe moulding process. A new commercially‐available catalyst for PN curing based on Ni(II) salts is recommended for composite pressing. Use of this catalyst helps to spread exothermal effects and simplify the curing process. It was shown that by varying reaction conditions, it is possible to adjust material properties such as T g , char yield, curing temperature, and processing time.