1. and Plastics, 6th edn, Van Nostrand Reinhold, New York (1981).
2. British Plastics Federation, Private Communication (1982).
3. Proceeding Interflam '79, Guildford, March 1979.
4. and Proceedings Interflam '79, Guildford, March 1979.
5. Chem. Ind. 781 (1981).