Radical polymerizations of styrene in the presence of C60 have been conducted at 90 °C in benzene using benzoyl peroxide (BPO) as initiator. The behaviors of C60 are investigated by monitoring BPO concentration, C60 content, and polymerization time. It is found that C60 acts like a radical absorber which multiply absorbs primary radicals from BPO and propagating radicals. Therefore, in the presence of C the yield and molecular weight decrease significantly. However, the molecular weight distribution is narrowed down by its coupling characteristics. At the beginning of the reaction, owing to the radical-absorbing effect of C60, it makes the chain-propagation restricted. However, the number of polystyrene chains added to C60 increases with polymerization time. Direct dilatometric experiment proves that C60 is mainly as inhibitor for radical polymerization of styrene by benzoyl peroxide. Besides, the glass transition temperature (Tg) of the copolymers increases with increasing content of C60.
|Number of pages||7|
|Journal||Journal of Polymer Science, Part A: Polymer Chemistry|
|Publication status||Published - 1999 Aug 1|
All Science Journal Classification (ASJC) codes
- Polymers and Plastics
- Organic Chemistry
- Materials Chemistry