摘要:

Experimental findings on the triple ion formation were examined by adopting more elaborate purification method for solvents. For polystyryllithium in dimethoxyethane (DME) and benzene mixtures, the overall rate constant of propagation (kp) was confirmed to increase with increasing living end concentration under some conditions, in contrast with cases for polystyryllithium in tetrahydrofuran-benzene mixtures and for polystyryl sodium, potassium and cesium in DME-benzene mixtures. The propagation by the inter-molecular triple ions proposed earlier in order to elucidate the kinetic “anomaly” mentioned above was briefly discussed.

ISSN:0022-233X    

DOI:10.1080/00222337508081507

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

Vinyl monomers containing a heteroaromatic substituent such as thiophene, thiazole, oxazole, and pyridine have been synthesized and radical copolymerization with styrene of these monomers was studied. Monomer reactivity ratios (r1, r2) and Alfrey-Price Q-e values were determined. The reactivities of these monomers (l/r1) are generally related to localization energy of the β-carbon of monomers (Lβ) In the case of anionic polymerization of isopropenyl monomers, a considerable amount of monomer remained in the living polymerization system. The equilibrium monomer concentrations were determined at different temperatures, and the heats and entropies of polymerization

ISSN:0022-233X    

DOI:10.1080/00222337508081508

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0022-233X    

DOI:10.1080/00222337508081496

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor