Effect of the nature of the alkyl group of initiation and termination in R(3)Al/RLi initiation of methyl methacrylate
UNSPECIFIED (1996) Effect of the nature of the alkyl group of initiation and termination in R(3)Al/RLi initiation of methyl methacrylate. In: International Symposium on Ionic Polymerization, ISTANBUL, TURKEY, SEP 04-08, 1995. Published in: MACROMOLECULAR SYMPOSIA, 107 pp. 177-188.Full text not available from this repository.
The polymerisation of methyl methacrylate has been investigated with mixed aluminium and lithium alkyls. The use of sterically hindered aluminium alkyls such as triisobutyl aluminium in conjunction with tert-butyl lithium leads to living polymerisation at 0 degrees C with little complications from secondary initiation or premature termination. The use of less bulky alkyl groups on either aluminium or lithium leads to both secondary initiation, as observed by the formation of high molecular weight polymer by GPC-LALLS and termination via cyclisation as observed by MALDI-TOF-MS. The initiator efficiencies, even when living polymerisation ensues, are considerably less than 100%.
|Item Type:||Conference Item (UNSPECIFIED)|
|Subjects:||Q Science > QD Chemistry|
|Journal or Publication Title:||MACROMOLECULAR SYMPOSIA|
|Publisher:||HUTHIG & WEPF VERLAG|
|Number of Pages:||12|
|Page Range:||pp. 177-188|
|Title of Event:||International Symposium on Ionic Polymerization|
|Location of Event:||ISTANBUL, TURKEY|
|Date(s) of Event:||SEP 04-08, 1995|
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