This paper describes the synthesis of an aromatic polyphosphonate from the reaction of phenoxy dichlorophosphate (PDCP) with 4,4'-sulphonyldiphenol (SDP) in a chlorinated hydrocarbon solvent under low temperature conditions. The glass transition temperature (Tz) and melt temperature (Tm) of PDCP/SDP polymer are 69°C and 133°C, respectively. The lower Tg value of PDCP/SDP compared to that of phenyl phosphonic dichloride/SDP may be attributed to the flexible ether linkage. This polymer started to lose weight at around 300°C under air or nitrogen atmosphere. The PDCP/SDP polymer has good flame retardancy, as indicated by high limiting oxygen index of 47.0
Посилання на статтю:
Synthesis of aromatic polyphosphonate' low temperature solution polycondensation of 4,4'-sulphonyldiphenol with phenoxy dichlorophosphate / Der-Jang Liaw* and Wen-Chang Shen // Polymer. – 1993. – Vol 34. – P. 1336-1338.