Precise Sulfite Functionalization of Polyolefins via ADMET Polymerization
Precise Sulfite Functionalization of Polyolefins via ADMET Polymerization
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DOI：
10.1021/acsmacrolett.5b00258
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发表时间：
2015-06-01
影响因子：
7.015
通讯作者：
Wagener, Kenneth B.
中科院分区：
文献类型：
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作者：
Gaines, Taylor W.;Nakano, Tatsuya;Wagener, Kenneth B.
含有亚硫酸盐的功能精确地放置在8，14，和20个亚甲基单元的运行长度之间的共聚物通过ADMET合成的重均分子量高达40 - 500克/摩尔（PDI = 1.89）。以前没有观察到这样的聚合物结构。通过H-1 NMR、C-13 NMR和IR光谱表征了聚合物的结构和性质。通过TGA观察到高达310 ° C的热降解温度，并且通过DSC测定类似的不饱和ADMET聚合物的典型熔点。使用X射线散射将聚合物与ADMET聚乙烯（PE）进行比较，并且当聚合物在亚硫酸盐之间具有20个碳时，官能团自组装成层。较高的碳含量掺入导致这些聚亚硫酸盐的结晶度和热稳定性的增加。
Copolymers containing sulfite functionalities precisely placed between run lengths of 8, 14, and 20 methylene units were synthesized via ADMET with weight-average molecular weights up to 40 500 g/mol (PDI = 1.89). No such polymer structures have been observed previously. The primary polymer structures and precise nature were characterized by H-1 NMR, C-13 NMR, and IR spectroscopy. Thermal degradation temperatures up to 310 degrees C were observed through TGA, and melting points typical of similar unsaturated ADMET polymers were determined by DSC. X-ray scattering was used to compare the polymers to ADMET polyethylene (PE), and when the polymers have 20 carbons between sulfites, the functional groups self-assemble into layers. Higher carbon content incorporation leads to an increase in crystallinity and thermal stability for these polysulfites.