Hits:

Indexed by:期刊论文

Date of Publication:2010-01-15

Journal:JOURNAL OF APPLIED POLYMER SCIENCE

Included Journals:SCIE、EI

Volume:115

Issue:2

Page Number:1032-1038

ISSN No.:0021-8995

Key Words:flame retardance; copolymerization; polystyrene

Abstract:Two phosphorus-containing acrylates of 1-oxo-2,6,7-trioxa-1-phorsphabicyclo[2,2,2]oct-4-yl methyl acrylate and (10-oxo-10-hydro-9-oxa-10 lambda(5)-phosphaphenanthrene-10-yl) methyl acrylate were free-radical-copolymerized with styrene (St). The r(1) reactivity ratio values (related to the novel acrylates) were 0.342 and 0.225, respectively, and the r(2) reactivity ratio values (related to St) were 0.432 and 0.503, respectively. The thermal stability of the copolymers was tested by thermogravimetric analysis (TGA) in N(2) or air, and the ignitability was tested by measurements of UL-94 vertical combustion tests and the limiting oxygen index. The results of TGA and combustion tests indicated that the effect of flame retardancy was determined by the nature of the phosphorus-containing substituent. Compared with the 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide based group, the 1oxo-2,6,7-trioxa-1-phorsphabicyclo[2,2,2]oct-4-yl methol based group could enhance the ability of char formation with an antidripping effect. It is concluded that phosphorus-containing acrylates are potential flame-retarding monomers for styrenic polymers. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 115: 1032-1038, 2010