Molecular Approach to Supramolecular Polymer Assembly by Small Angle Neutron Scattering
Molecular Approach to Supramolecular Polymer Assembly by Small Angle Neutron Scattering
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DOI：
10.1021/ma401714r
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发表时间：
2013-12-10
期刊：
影响因子：
5.5
通讯作者：
Richter, Dieter
中科院分区：
文献类型：
--
作者：
Bras, Ana R.;Hoevelmann, Claas H.;Richter, Dieter
我们提出了一个小角中子散射（SANS）研究杂互补远旋聚丙烯乙二醇（PPG）聚合物，以二氨基三嗪（DAT）或胸腺嘧啶（Thy）作为端基，在熔体和稀溶液中。SANS数据严格检查的结构和形态，以及相对程度的线性组装在极性溶剂甲苯。提出了一种适用于超分子组装的多嵌段共聚物的随机相近似（RPA）方法，该方法可以提取组分与介质之间的相互作用参数。从所提出的方法，它描述了非常好的杂互补氢键远螺旋聚合物在稀释甲苯溶液和熔体中，我们得出结论，线性缔合盛行。
We present a small angle neutron scattering (SANS) study of the association of heterocomplementary telechelic polypropylene glycol (PPG) polymers, bearing either diaminotriazine (DAT) or thymine (Thy) stickers as end-groups, both in the melt and in dilute solution. The SANS data are critically examined for the architecture and morphology as well as relative extent of linear assembly in the apolar solvent toluene. A random phase approximation (RPA) approach, adapted for a supramolecularly assembled multiblock copolymer is presented, which allows to extract the interaction parameters between the constituents and the medium. From the proposed approach, which describes very well heterocomplementary hydrogen-bonding telechelic polymers in both diluted toluene solution and in the melt, we conclude that linear association prevails.