Architectural control of polystyrene physical properties using branched anionic polymerization initiated at ambient temperature
Architectural control of polystyrene physical properties using branched anionic polymerization initiated at ambient temperature
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DOI：
10.1002/pol.20200143
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发表时间：
2020-05-15
影响因子：
3.4
通讯作者：
Rannard, Steve P.
中科院分区：
文献类型：
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作者：
Alhilfi, Tamara;Chambon, Pierre;Rannard, Steve P.
环境温度引发的阴离子聚合通过将二苯乙烯基支化共聚单体包含到苯乙烯的常规仲丁基锂引发的聚合中而产生不同分子量和结构的支化聚苯乙烯。支链聚合物内的主链长度控制，以及支链点对主链的不同片段的限制，导致玻璃化转变温度的变化，与支链聚合物分子量没有直接相关性，但与包含支链大分子的各个链的长度有很强的关系。
Ambient temperature-initiated anionic polymerization has generated branched polystyrenes of varying molecular weights and architectures by inclusion of a distyryl branching comonomer into a conventional sec-Butylithium-initiated polymerization of styrene. Primary chain length control within the branched polymers, and restriction of the branching points to varying segments of the primary chains, led to variations of glass transition temperature with no direct correlation to the branched polymer molecular weight but a strong relationship to the length of individual chains comprising the branched macromolecules.