ISSN:
1436-2449
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Summary Spontaneous polymerization of methyl methacrylate (MMA) takes place in the presence of cholesteryl 2-(ethoxy ethoxy) ethyl carbonate (CHEEC) in liquid crystalline phase at 12.5°C and in isotropic phase at 30.0°C. Percentage of conversion increases, whereas molecular weight decreases, with increase in the concentration of CHEEC. Tacticities of the polymers (as analysed by NMR) are independent of the concentration of CHEEC. The interaction between CHEEC and MMA in various solvents are investigated by viscometry and U.V. spectrophotometry. Similar experiments with a mixture of vinyl acetate (VAc) gave no evidence of spontaneous polymerization. A plausible mechanism of the spontaneous polymerization of MMA, involving formation of a complex between MMA and CHEEC, is discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00254888
