Synthesis of Cyclic Polysulfides: Controlled Ring-Expansion Polymerization of Cyclic Tetrathioester with Thiirane
Synthesis of Cyclic Polysulfides: Controlled Ring-Expansion Polymerization of Cyclic Tetrathioester with Thiirane
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环状多硫化物的合成：环状四硫酯与硫丙环的受控扩环聚合
DOI：
10.1002/pola.27068
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Yuki Takeshi
中科院分区：
文献类型：
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作者：
Hiroto Kudo;Yuki Takeshi
我们合成了在芳香族骨架的邻位（o-CTE）和间位（m-CTE）处含有硫酯部分的环状四硫酯。使用四丁基氯化铵作为催化剂，在 1-甲基-2-吡咯烷酮中检查苯氧基丙烯硫醚 (PPS) 与 o-CTE 和 m-CTE 的反应，产生相应的环状多硫化物聚[o-CTE(PPS)n]，其中 Mn's = 37,000–54,000，产率 34–61%，聚[m-CTE(PPS)n]，Mn's = 46,600–107,200，产率63–>99%。虽然聚[o-CTE(PPS)n]的分子量无法控制，但聚[m-CTE(PPS)n]的分子量可以通过PPS的投料比和反应温度来控制。此外，聚[m-CTE(PPS)n]的玻璃化转变温度（Tg）和热分解温度（Tdi）随着分子量的降低而升高。 © 2013 Wiley periodicals, Inc. J. Polym。科学，A 部分：聚合物。化学.2014,52, 857–866
We synthesized cyclic tetrathioesters containing thioester moieties at theo‐position (o‐CTE) andm‐position (m‐CTE) of an aromatic skeleton. The reaction of phenoxy propylenesulfide (PPS) witho‐CTE andm‐CTE was examined using tetrabutylammonium chloride as a catalyst in 1‐methyl‐2‐pyrrolidinone, yielding the corresponding cyclic polysulfides poly[o‐CTE(PPS)n] withMn's = 37,000–54,000 at 34–61% yields and poly[m‐CTE(PPS)n] withMn's = 46,600–107,200 at 63–>99% yields. Although the molecular weights of poly[o‐CTE(PPS)n] could not be controlled, those of poly[m‐CTE(PPS)n] could be controlled by the feed ratios of PPS and reaction temperature. Furthermore, the glass transition temperature (Tg) and thermal decomposition temperature (Tdi) of poly[m‐CTE(PPS)n] increased with decreasing molecular weights. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem.2014,52, 857–866