Synthesis and characterization of modular polyphosphonate homopolymers and copolymers
Synthesis and characterization of modular polyphosphonate homopolymers and copolymers
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模块化聚膦酸酯均聚物和共聚物的合成和表征
DOI:
10.1002/pol.20200066
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发表时间:
2020
影响因子:
3.4
通讯作者:
Gray, Gary M.
中科院分区:
文献类型:
--
作者:
Totsch, Timothy R.;Stanford, Victoria L.;Klep, Oleksander;Burdette, Mary K.;Grant, Benjamin;Foulger, Stephen H.;Gray, Gary M.
Linear polyphosphonates with the generic formula –[P(Ph)(X)OR′O]n– (X = S or Se) have been synthesized by polycondensations of P(Ph)(NEt2)2and a diol (HOR′OH = 1,4‐cyclohexanedimethanol, 1,4‐benzenedimethanol, tetraethylene glycol, or 1,12‐dodecanediol) followed by reaction with a chalcogen. Random copolymers have been synthesized by polycondensations of P(Ph)(NEt2)2and mixture of two of the diols in a 2:1:1 mol ratio followed by reaction with a chalcogen. Block copolymers with the generic formula –[P(Ph)(X)OR′O](x + 2)–[P(Ph)(X)OR′O](x + 3)– (X = S or Se) have been synthesized by the polycondensations of Et2N[P(Ph)(X)OR′O](x + 2)P(Ph)NEt2oligomers with HOR′O[P(Ph)(X)OR′O](x + 3)H oligomers followed by reaction with a chalcogen. The Et2N[P(Ph)(X)OR′O](x + 2)P(Ph)NEt2oligomers are prepared by the reaction of an excess of P(Ph)(NEt2)2with a diol while the HOR′O[P(Ph)(X)OR′O](x + 3)H oligomers are prepared by the reaction of P(Ph)(NEt2)2with an excess of the diol. In each case the excess, x is the same and determines the average block sizes. All of the polymers were characterized using1H,13C{1H}, and31P{1H} NMR spectroscopy, TGA, DSC, and SEC.31P{1H} NMR spectroscopy demonstrates that the random and block copolymers have the expected arrangements of monomers and, in the case of block copolymers, verifies the block sizes. All polymers are thermally stable up to ~300°C, and the arrangements of monomers in the copolymers (block vs. random) affect their degradation temperatures andTgprofiles. The polymers have weight average MWs of up to 3.8 × 104Da.
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DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
R. Vini;S. Thenmozhi;SC Murugavel
通讯作者:
SC Murugavel
DOI:
10.1002/anie.201711735
发表时间:
2018-08-13
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
作者:
Velencoso MM;Battig A;Markwart JC;Schartel B;Wurm FR
通讯作者:
Wurm FR
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
S. Penczek
通讯作者:
S. Penczek
DOI:
--
发表时间:
1996
期刊:
影响因子:
--
作者:
Yuehua Zhang;J. Tebby;J. Wheeler
通讯作者:
J. Wheeler
DOI:
--
发表时间:
1978
期刊:
影响因子:
--
作者:
H. Markovitz
通讯作者:
H. Markovitz