Enhanced Thermal Stability of Polystyrene by Interfacial Noncovalent Interactions

• DOI: 10.1021/acs.macromol.8b01012
• Publication Date: 2018-07-19T05:33:28Z
• Authors: Yongming Hong; Yawei Li; Fengliang Wang; Biao Zuo; Xinping Wang; Li Zhang; Daisuke Kawaguchi; Keiji Tanaka
• Keywords: Polystyrene; Thermal Stability; Non-covalent interactions

The local conformation of polystyrene (PS) and deuterated PS at the interface with quartz substrates, which were covered phenyl groups using phenyltrimethoxysilane (PTS) under various conditions, was examined by sum frequency generation spectroscopy. As evidenced red-shift wavenumber v2 vibration mode for groups, it claimed that PTS standing vertically from surface induced perpendicular orientation rings energetically favorable parallel-displaced π–π interactions interface. chains strongly anchored onto substrate remained almost unchanged 48 h even a temperature 60 K higher than bulk glass transition temperature. That is, interfacial facilitated adsorption on to attain large enthalpic gain, resulting in significantly slower dynamics Our results illustrate importance noncovalent controlling structure macromolecular as well thin film geometry.