Two-Dimensional Correlation Vibrational Spectroscopy Study on Intermolecular Interactions in Polymer Blends

聚合物共混物分子间相互作用的二维相关振动光谱研究

• 批准号: 09640616
• 负责人: OZAKI Yukihiro
• 金额: $ 1.92万
• 依托单位: Kwansei Gakuin University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640616/
• 关键词: Polymer; Polymer blends; Two-dimensional Correlation Spectroscopy; Vibrational Spectroscopy; Intermolecular Interaction; Hydrogen-Bonds; 赤外分光法; 相溶性

Two-dimensional infrared, Raman, near-infrared (2D IR, 2D Raman, 2D NIR) correlation spectroscopy and hetero 2D correlation spectroscopy have been applied to the studies of the conformational changes and specific interactions in various polymer blends such as those of atactic polystyrene (PS) and poly(2,6-dimethyl-1,4-phenylene ether)(PPE), It was found that 2D vibrational correlation spectroscopy is powerful in detecting bands which are not readily identified in onedimensional spectra. The 2D synchronous correlation analysis separates the NIR bands of PS from those of PPE.The 2D asynchronous correlation analysis produces cross peaks that are indicative of the specific interaction or the conformational change in the blends. It is concluded from the 2D correlation analysis that not only the phenyl rings of PS and PPE but also the CH_3 groups of PPE play important roles in the formation of the blends.The 2D Raman-NIR heterospectral correlation spectroscopy was employed to investigate intermolecular interactions in the blends of poly(methyl methacrylate) (PMMA) and poly(4-vinyiphenol) (PVPh). Ten blends of PMMA/PVPh studied contained small PVPh contents from 1 to10 weight percentages. 2D hetero correlation spectroscopy was first applied to separate the weak vibrational bands of the minority PVPh from the strong bands of the principal PMMA, and then to detect the intermolecular interactions between PMMA and PVPh. The Raman-NIR hetero-correlation analysis detects two bands at 6764 and 4637 cm_<-1> for the hydrogen-bonded hydroxyl group of PVPh, and one band at 5052 cm_<-1> for the hydrogen-bonded carbonyl group of PMMA.All these bands are not identifiable from the one-dimensional spectra.

用二维红外、拉曼、近红外(2D IR、2D喇曼、2D NIR)相关光谱和异2D相关光谱研究了无规聚苯乙烯(PS)和聚(2，6-二甲基-1，4-苯基醚)(PPE)等聚合物共混物的构象变化和特殊相互作用，发现二维振动相关谱能很好地探测一维光谱中难以识别的谱带。2D同步相关分析分离了PS和PPE的近红外光谱谱带，2D异步相关分析产生了指示共混物中特定相互作用或构象变化的交叉峰。二维相关分析表明，PS和PPE中的苯环以及PPE中的CH3基团对共混物的形成起着重要的作用。所研究的10种PMMA/PVPh共混物的PVPh含量从1%到10%不等。首先用2D异质关联光谱分离了少量PVPh的弱振动带和主PMMA的强振动带，然后检测了PMMA和PVPh之间的分子间相互作用。拉曼-近红外光谱异相关分析表明，PVPh氢键羟基在6764和4637 cm~(-1)处有两个谱带，PMMA氢键羰基在5052 cm_(-1)~(-1)处有一个谱带，所有这些谱带都不能从一维光谱中识别出来。

项目成果

M.Shimoyama, K.Matsukawa, H.Inoue, T.Ninomiya, Y.Ozaki: "Two-Dimensional Near-Infrated Correlation Spectroscopy Studies of Polymer Blends 1 : Composition-Dependent Spectral Variations of Atactic Polystyrene and Poly (2,4-Dimetyle-1,4-Phenyrene Ether)" Mac

M.Shimoyama、K.Matsukawa、H.Inoue、T.Ninomiya、Y.Ozaki：“聚合物共混物的二维近红外相关光谱研究 1：无规聚苯乙烯和聚 (2,4-

Y.Ren,M.Shimoyama,T.Ninomiya K.Matsukawa,H.Inoue,I.Noda,Y.Ozaki: "Two-Dimensional Near-Infrared Correlation Spectroscopy Studies on Composition-Dependent Spectral Variations in Ethylene/Vinyl Acetate Copdymers;Assignments of Bands due to Ethylene Units in

Y.Ren，M.Shimoyama，T.Ninomiya K.Matsukawa，H.Inoue，I.Noda，Y.Ozaki：“乙烯/醋酸乙烯酯共聚物中成分依赖性光谱变化的二维近红外相关光谱研究；

M.Shimoyama,S.Hayano,K.Matsukawa H,Inoue,T.Ninomiya,Y,Ozaki: "Discrimination of Ethylene/Vinyl Acetate Copolymers with Different Composition and Prediction of Content of Vinyl Acetate in the Copolymers and Their Melting Points by Near-infrared Spectroscop

M.Shimoyama,S.Hayano,K.Matsukawa H,Inoue,T.Ninomiya,Y,Ozaki：“不同组成的乙烯/醋酸乙烯酯共聚物的判别以及通过近场分析预测共聚物中醋酸乙烯酯的含量及其熔点

Y.Ren,Y.Ozaki,T.Murakami T.Nishioka,K.Nakashima: "Two-Dimensional Near-Infrared Correlation Spectroscopy Studies of Polymer Blends I:Composition-Dependent Spectral Variations of Blends of Atactic Polystyrene and poly[2,6-Dimethyl-1,4-phenylene Ether]" Mac

Y.Ren,Y.Ozaki,T.Murakami T.Nishioka,K.Nakashima：“聚合物共混物的二维近红外相关光谱研究 I：无规聚苯乙烯和聚共混物的成分依赖性光谱变化[2,6

M.Shimoyama, S.Hayano, K.Matsukawa, H.Inoue, T.Ninomiya, Y.Ozaki: "Discrimination of Ethylene /Vinyl. Acetate Copolymers with Different Composition and Prediction of the Content of Vinyl Acetate in the Copolymers and Their Melting points by Near-infrared

M.Shimoyama、S.Hayano、K.Matsukawa、H.Inoue、T.Ninomiya、Y.Ozaki：“不同组成的乙烯/醋酸乙烯酯共聚物的判别以及共聚物中醋酸乙烯酯含量及其熔化的预测