Controlled RAFT Cyclopolymerization of Oriented Styrenic Difunctional Monomers

被引:23
|
作者
Sharma, Arvind K. [1 ]
Cornaggia, Claudio [1 ]
Pasini, Dario [1 ]
机构
[1] Univ Pavia, Dept Organ Chem, I-27100 Pavia, Italy
关键词
cyclopolymerization; radical polymerization; reversible addition fragmentation chain transfer (RAFT); styrene derivatives; TRANSFER RADICAL POLYMERIZATION; 193 NM MICROLITHOGRAPHY; RING-CLOSING CYCLOPOLYMERIZATION; CHAIN TRANSFER POLYMERIZATION; DIALLYLDIMETHYLAMMONIUM CHLORIDE; ETHER DIMER; POLYMERS; ORTHOFORMATE; CHROMOPHORES; CYCLIZATION;
D O I
10.1002/macp.201000419
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
We describe the first example of controlled free radical cyclopolymerization of difunctional styrenic monomers. The newly designed monomers are obtained from the introduction of two 4-vinylbenzyl moieties as malonate or dialkylated malonate esters. The more sterically hindered monomer is particularly efficient in the cyclization and propagation processes, giving cyclopolymers, in diluted solvent conditions, with good yields and degrees of polymerization. In the presence of a suitable RAFT mediator, and, upon careful optimization of the solvent, temperature and monomer concentration, a linear increase in the number average molecular weight with conversion and low polydispersity indexes can be achieved.
引用
收藏
页码:2254 / 2259
页数:6
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