Polycarbosilane (PCS) of high molecule weight was a kind of important precursor for SiC fibers with low oxygen content.High molecule weight PCS was synthesized under high pressure by using PCS of low/middle molecule weight synthesized under normal pressure.The structure and performance of the products were characterized by means of FTIR
GPC and NMR measurements.PCS samples of weight overage molecular weight 6400~8500 and less degree of branching were obtained.The suitable conditions for preparation are as follows:reaction time 6 h
YNTHESIS AND CHARACTERIZATION OF POLYZIRCONOCARBOSILANE PRECURSOR
SYNTHESIS AND CHARACTERIZATION OF PHOSPHORUS-CONTAINING LIQUID CRYSTALLINE COPOLYESTERS BASED ON BIPHENYL-4,4'-DICARBOXYLIC ACID
SYNTHESIS AND MAGNETIC PROPERTIES OF POLY(SCHIFF BASE) COMPLEXES CONTAINING 1,10-PHENANTHROLINE AND PYRIDINE UNIT
INFLUENCE OF END GROUP ON THE BANDED STRUCTURE OF PLLA SPHERULITES
SYNTHESIS AND GAS PERMEATION CHARACTERIZATION OF POLY[(HEXAFLUOROISOPROPYLOXY)2-x (TRIFLUOROETHOXY) x] PHOSPHAZENE
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Center for Degradable and Flame-Retardant Polymeric Materials, College of Chemistry, State Key Laboratory of Polymer Materials Engineering, National Engineering Laboratory of Eco-Friendly Polymeric Materials Sichuan, Sichuan University