The propagation rate constants of the cationic polymerization of alkenes—part III. Indene, two vinyl ethers and general discussion
✍ Scribed by Peter H. Plesch; Sarkis H. Shamlian
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 606 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0014-3057
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✦ Synopsis
We report on the measurement of the propagation rate constants k~ of styrene, indene, phenyl vinyl ether (PhViE) and 2-chloroethyl vinyl ether (CEViE) in nitrobenzene at (mostly) 298 K with 4-CIC6H4CO+SbF~ -as initiator. The dependence of the conductivity on the [4-C1C6H4CO+SbF6] = c o helped to establish that [P,+] = c o and thus to validate the foundation of this work. It is shown that most probably the propagating species are the uncomplexed, unpaired, solvated carbenium ions. Some new enthalpies of polymerization have been found.
Monomer
Styrene Indene PhViE CEViE kp/dm 3' mo1-1 -sec -t 195 __+ 15 373 + 15 1450 + 200 ca 104 -AHp/kJ • mol -I 64+2.5 56+0.5 110+ 10 80+8