Citation: Min WANG, You Gang MAO, Yan Ying LU, Ren Fei YANG, Fei LI, Jia Cong SHEN. The Effect of the Chain Length on MMA Free Radicl Polymerization[J]. Chinese Chemical Letters, ;2001, 12(11): 1041-1042. shu

The Effect of the Chain Length on MMA Free Radicl Polymerization

Key Laboratory for Supramolecular Structure and Spectroscopy of Ministry of Education, Jilin University, Changchun 130023

Received Date: 27 December 2000

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 29674011) and the Special Funds for Major State Basic Research Projects (G1999064803). We also Thanks the National Laboratory of Theoretical and Computational Chemistry of Jilin University for financial support.

In the polymerization process of methyl methacrylate (MMA), the Arrhenius parameters (activation energy and frequency factor) of propagating reaction monotonically decrease with increasing monomer conversion. At the beginning and middle stage of the propagating reaction, the increase of radical chain length is the main reason of above mentioned change. And at the end stage, the sharp decrease of k_p indicates that the activation energy is approximately incline to zero and the propagating reaction is controlled by molecular diffusion motion.
- MMA,
- Arrhenius parameters,
- propagating reaction,
- radical chain length
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