Nanoscale layers of precise ion-containing polyamides with lithiated phenyl sulfonate in the polymer backbone
Nanoscale layers of precise ion-containing polyamides with lithiated phenyl sulfonate in the polymer backbone
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聚合物主链中含有苯基磺酸锂的精密含离子聚酰胺纳米级层
DOI:
10.1039/d2py00802e
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发表时间:
2022
影响因子:
4.6
通讯作者:
Taylor, Mercedes K.
中科院分区:
文献类型:
--
作者:
Park, Jinseok;Easterling, Charles P.;Armstrong, Christopher C.;Huber, Dale L.;Bowman, Jared I.;Sumerlin, Brent S.;Winey, Karen I.;Taylor, Mercedes K.
We investigate a new series of precise ion-containing polyamide sulfonates (PASxLi), where a short polar block precisely alternates with a non-polar block of aliphatic carbons (x = 4, 5, 10, or 16) to form an alternating (AB)n multiblock architecture. The polar block includes a lithiated phenyl sulfonate in the polymer backbone. These PASxLi polymers were synthesized via polycondensation of diaminobenzenesulfonic acid and alkyl diacids (or alkyl diacyl chlorides) with x-carbons, containing amide bonds at the block linkages. The para- and meta-substituted diaminobenzene monomers led to polymer analogs denoted pPASxLi and mPASxLi, respectively. When x ≤ 10, the para-substituted diamine monomer yields multiblock copolymers of a higher degree of polymerization than the meta-substituted isomer, due to the greater electron-withdrawing effect of the meta-substituted monomer. The PASxLi polymers exhibit excellent thermal stability with less than 5% mass loss at 300 °C and the glass transition temperatures (Tg) decrease with increasing hydrocarbon block length (x). Using the random phase approximation, the Flory–Huggins interaction parameter (χ) is determined for pPAS10Li, and χ (260 °C) ∼ 2.92 reveals high incompatibility between the polar ionic and non-polar hydrocarbon blocks. The polymer with the longest hydrocarbon block, pPAS16Li, is semicrystalline and forms well-defined nanoscale layers with a spacing of ∼2.7 nm. Relative to previously studied polyester multiblock copolymers, the amide groups and aromatic rings permit the nanoscale layers to persist up to 250 °C and thus increase the stability range for ordered morphologies in precise ion-containing multiblock copolymers.
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影响因子:
8
作者:
Park, Jinseok;Winey, Karen I
通讯作者:
Winey, Karen I
影响因子:
5.5
作者:
Yan, Lu;Hoang, Lauren;Winey, Karen I.
通讯作者:
Winey, Karen I.
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
--
影响因子:
4.6
作者:
S. Viale;W. Jager;S. Picken
通讯作者:
S. Picken
DOI:
--
发表时间:
1991
期刊:
影响因子:
--
作者:
Shinsuke Tsubakihara;A. Nakamura;M. Yasuniwa
通讯作者:
M. Yasuniwa