화학공학소재연구정보센터
Journal of Applied Polymer Science, Vol.115, No.2, 1032-1038, 2010
Copolymerization 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-phosphaphenanthrene-10-yl) Methyl Acrylate with Styrene and Their Thermal Degradation Characteristics
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