Predicting the Plateau Modulus from Molecular Parameters of Conjugated Polymers.
Predicting the Plateau Modulus from Molecular Parameters of Conjugated Polymers.
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从共轭聚合物的分子参数预测平台模量。
DOI:
10.1021/acscentsci.1c01396
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发表时间:
2022-02-23
影响因子:
18.2
通讯作者:
Colby RH
中科院分区:
文献类型:
--
作者:
Fenton AM;Xie R;Aplan MP;Lee Y;Gill MG;Fair R;Kempe F;Sommer M;Snyder CR;Gomez ED;Colby RH
The relationship between Kuhn length lk, Kuhn monomer volume v0, and plateau modulus GN0, initially proposed by Graessley and Edwards for flexible polymers, and extended by Everaers, has a large gap in experimental data between the flexible and stiff regimes. This gap prevents the prediction of mechanical properties from the chain structure for any polymer in this region. Given the chain architecture, including a semiflexible backbone and side chains, conjugated polymers are an ideal class of material to study this crossover region. Using small angle neutron scattering, oscillatory shear rheology, and the freely rotating chain model, we have shown that 12 polymers with aromatic backbones populate a large part of this gap. We also have shown that a few of these polymers exhibit nematic ordering, which lowers GN0. When fully isotropic, these polymers follow a relationship between lk, v0, and GN0, with a simple crossover proposed in terms of the number of Kuhn segments in an entanglement strand Ne. Bridging the previously unpopulated gap between flexible and stiff entangled polymers using semiflexible conjugated polymers.
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影响因子:
56.9
作者:
Everaers, R;Sukumaran, SK;Kremer, K
通讯作者:
Kremer, K
影响因子:
4
作者:
Lin, Pei-Chun;Yang, Shu
通讯作者:
Yang, Shu
影响因子:
5.5
作者:
Snyder, Chad R.;Henry, Jessica S.;DeLongchamp, Dean M.
通讯作者:
DeLongchamp, Dean M.
影响因子:
8.6
作者:
KAVASSALIS, TA;NOOLANDI, J
通讯作者:
NOOLANDI, J
影响因子:
8.6
作者:
Rivnay, Jonathan;Owens, Roisin M.;Malliaras, George G.
通讯作者:
Malliaras, George G.