Phosphorus-containing polyaryloxydiphenyl-silanes with high flame retardance arising from a phosphorus-silicon synergistic effect

摘要

Polyaryloxydiphenylsilanes were prepared from phosphorus-containing diols and diphenyldichlorolsilane through solution polymerization. With a stoichiometric imbalance in feed monomers, the resulting polymers exhibited moderate melting points and good processing properties. The polymers prepared showed initial decomposition temperatures above 340 ℃, excellent thermal stability, high char yields at 850 ℃ and very high limited oxygen index values of 56-59. The polymers' char yields and their (P + Si) contents showed linear relationships.