Aucbvax.4598 fa.space utzoo!decvax!ucbvax!space Thu Oct 22 04:52:14 1981 SPACE Digest V2 #18 >From OTA@S1-A Thu Oct 22 04:23:17 1981 SPACE Digest Volume 2 : Issue 18 Today's Topics: carbonless plastics ---------------------------------------------------------------------- From: CARLF@MIT-AI Date: 10/21/81 11:49:46 Subject: carbonless plastics CARLF@MIT-AI 10/21/81 11:49:46 Re: carbonless plastics To: SPACE at MIT-MC The polymerized sand you ask about is glass. The silicones consist of a backbone of alternating Si and O, with two hydrocarbon side groups coming off of each Si. CH3 is a typical side group. They can indeed stand high temperatures, up to several hundred degrees centigrade. Silicones can indeed be made with a very low fraction of volatile component; grease used in vacuum systems is silicone. Silicone is also reasonably invulnerable to ultraviolet. The problem with it is that it isn't very strong stuff. I've never heard of anything more solid than rubber being made from silicone. What prompts you to this query about carbonless plastics? If you really want to know, I can tell you quite a bit. -- Carl ------------------------------ End of SPACE Digest ******************* ----------------------------------------------------------------- gopher://quux.org/ conversion by John Goerzen of http://communication.ucsd.edu/A-News/ This Usenet Oldnews Archive article may be copied and distributed freely, provided: 1. There is no money collected for the text(s) of the articles. 2. The following notice remains appended to each copy: The Usenet Oldnews Archive: Compilation Copyright (C) 1981, 1996 Bruce Jones, Henry Spencer, David Wiseman.