标题：A thermosensitive supramolecular aggregation from linear telechelic polydimethylsiloxane with self-assembly units
作者：Wang, Y.;Du, L.;Zhang, J.;Feng, S.
作者机构：[Wang, Y] Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Jinan 250100, China;[ Du, L] Institut 更多
通讯作者地址：[Feng, SY]Shandong Univ, Sch Chem & Chem Engn, Key Lab Special Funct Aggregated Mat, Minist Educ, Jinan 250100, Peoples R China.
来源：Journal of Polymer Research
关键词：Hydrogen bonding;Phase segregation;Self-assembly;Supramolecular aggregation;Thermosensitivity
摘要：A new thermosensitive material, polydimethylsiloxane supramolecular aggregation (PDMS-SMA-1), was prepared by coupling the N-pyridin-2-yl-succinamic acid with aminopropyl-terminated polydimethylsiloxane via amidated reaction. Its structure was confirmed by FT-IR, ~1H NMR and ~(13)C NMR. And the FT-IR spectra, molecular dynamics simulations and density functional theory calculations supported the existence of intermolecular hydrogen bonding and π-π stacking in supramolecular aggregation and obtained its possible self-assembly structure. A combination of DSC measurements, oscillatory shear experiments, and AFM measurements was carried out to further investigate the nature of PDMS-SMA-1. The results indicated that hydrogen bonding and π-π stacking combined with phase segregation were important for the preparation of thermosensitive materials. Moreover, in order to investigate the effect of molecular weight on the thermal sensitivity and morphology of supramolecular aggregation, PDMS-SMA-2 with higher molecular weight was also synthesized. In contrast to PDMS-SMA-1, it had similar thermal properties but different morphology. All the characteristics of supramolecular aggregation suggested a much wider range of hydrogen bonding and π-π stacking motifs which could be applied in intelligent materials.