SYNTHESIS OF ELASTOMERS CONTAINING SI-N BONDS IN THE MAIN CHAIN
Abstract
Polymers containing silicon and nitrogen in the main chain with intrinsic viscosities (in toluene) up to 1.6 have been prepared by the condensation of hexamethylcyclotrisilazane with bisphenol A. When 4,4'-dihydroxyphenyl is used as the diol, polymers with improved thermal stability are obtained. The screening of various other monomer compositions is described. The great stability of small ring silicon-nitrogen compounds under the influence of acidic and basic catalysts is demonstrated in a variety of experiments; however, some conversion of octamethylcyclotetrasilazane to hexamethylcyclotrisilazane was observed at 175 degrees in the presence of aluminum or ferric chloride. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 21, 1962
- Accession Number
- AD0294196
Entities
People
- L.w. Breed
- R.l. Elliott
Organizations
- MRIGlobal