ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

The polymerization of tetrasubstituted allylmethylsilanes. I. Kinetics of the polymerization of allyltrimethylsilane and diallyldimethylsilane

D. Mikulášová and A. Hrivík

Slovak Technical University, Bratislava

Abstract: The polymerization of CH₂:CHCH₂SiMe₃ (I) and (CH_2:CHCH₂)₂SiMe₂ (II) in the presence of (tert-BuO)₂ at 120-150° was studied. I is very difficult to polymerize. Under analogous conditions II has a considerably greater polymerization capacity which can be explained by the presence of a greater no. of double bonds. By calcg. for one double bond the activation energy increases from 34 to 35 kcal./mole in I and from 24.5 to 25.2 kcal./mole in II. The linear relationship of polymerization speed to the first power of initiator concn. was proven. By detg. the mol. wt. of the polymer it was proven that the polymerization degree in I is in the range from 3.8 to 4.7 and in II from 4.4 to 9.3. The value of av. mol. wt. does not depend on the concn. of the initiator and increases with higher temp.

Full paper in Portable Document Format: 1111a641.pdf (in Slovak)

Chemical Papers 11 (11) 641–650 (1957)