Solvent quality affects chain conformational order at the polymer surface revealed by sum frequency generation vibrational spectroscopy
Solvent quality affects chain conformational order at the polymer surface revealed by sum frequency generation vibrational spectroscopy
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DOI：
10.1016/j.polymer.2013.02.002
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发表时间：
2013-03
期刊：
影响因子：
4.6
通讯作者：
Bolin Li;Jie Zhou;Xin Xu;Jin-Cheng Yu;Wei Shao;Yong Fang;Xiaolin Lu
中科院分区：
文献类型：
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作者：
Bolin Li;Jie Zhou;Xin Xu;Jin-Cheng Yu;Wei Shao;Yong Fang;Xiaolin Lu
发现由不同质量的溶剂制备的PMA和PMMA薄膜的表面和频产生（SFG）振动光谱有所不同。这表明 PMA 和 PMMA 薄膜的表面分子结构受到溶剂质量的影响。通过将侧发色基团的 SFG 共振信号与引入的链弧夹角相关联，使用简单的唯象模型来描述聚合物表面的链构象顺序。该模型被认为适用于具有对 SFG 光谱有活性的短且刚性侧发色团的聚合物。
The surface sum frequency generation (SFG) vibrational spectroscopic spectra of PMA and PMMA films prepared from solvents with different qualities were found different. This suggests that the surface molecular structures of PMA and PMMA films were affected by the solvent quality. A simple phenomenological model was used to describe the chain conformational order at the polymer surface by correlating the SFG resonant signals of the side chromophoric groups to the introduced chain arc included angle. This model is believed to be applicable for polymers with short and rigid side chromophores active for the SFG spectroscopy.