Accession Number:

ADA099030

Title:

Organosilane Polymers. IV. Polycarbosilane Precursors for Silicon Carbide.

Descriptive Note:

Final technical rept. Aug 78-Dec 80,

Corporate Author:

UNION CARBIDE CORP TARRYTOWN NY

Report Date:

1981-01-01

Pagination or Media Count:

33.0

Abstract:

The current objectives of this project are 1 optimized preparations of tractable polycarbosilane precursors for silicon carbide 2 conversion of such polycarbosilanes to silicon carbide including shaped articles thereof, such as fibers and 3 development of fundamental understanding of the preparative and pyrolytic chemistry. One-step preparations of tractable polycarbosilanes are achieved through silicon-carbon bond-forming reactions of vinylic or chloromethyl ClCH2- silanes. These polymers are directly convertible to silicon carbide compositions by atmospheric pressure pyrolysis. Backbone branching is recognized as essential for practical conversion of such polycarbosilanes to silicon carbide.

Subject Categories:

  • Polymer Chemistry
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE