Thermal stability of copolymers of isobutylene with certain α-methylstyrene derivatives
- 13 Downloads
Viscosity-index improvers have been obtained by modification of polyisobutylene, specifically, by copolymerizing isobutylene with o-, m-, and p-isopropenyltoluenes and isopropenyl-p-xylene. The thermal stability of the homopolymers and copolymers has been studied by heating samples of these materials and of their solutions in Turbine Oil L, the changes being followed by viscometry and thermogravimetry.
It has been established that the viscosity loss upon heating solutions of these copolymers in oil is substantially less than that for a polyisobutylene solution.
When the copolymers are heated in air or in argon, volatile products are formed in greater amounts than from polyisobutylene under similar heating conditions.
KeywordsViscosity Argon Thermal Stability Thermogravimetry Isobutylene
Unable to display preview. Download preview PDF.
- 1.A. M. Kuliev, Z. A. Sadykhov, and A. M. Levshina, Azerb. Khim. Zh., No. 3, 17 (1961).Google Scholar
- 2.A. M. Kuliev, Z. A. Sadykhov, A. M. Levshina, et al., Lube Oil Additives [in Russian], No. 1, Izd. Akad. Nauk Azerb. SSR, Baku (1967), p. 110.Google Scholar
- 3.A. M. Kuliev, Z. A. Sadykhov, et al., Uchen. Zap. Azerb. Gos. Univ. im. S. M. Kirova, Ser. Khim., No. 2, 63 (1966).Google Scholar
- 4.S. L. Madorsky, Thermal Degradation of Organic Polymers, Interscience, New York (1964).Google Scholar