Dynamics inN-Isopropylacrylamide-acrylic Acid Copolymer Aqueous Solution from Mechanical Spectroscopy

2012 ◽  
Vol 116 (45) ◽  
pp. 13411-13415
Author(s):  
Huaguang Wang ◽  
Xuebang Wu ◽  
C. S. Liu ◽  
Zhengang Zhu ◽  
Zhuo Ao ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Acrylic Acid ◽  
Mechanical Spectroscopy ◽  
Acid Copolymer ◽  
Acrylic Acid Copolymer

Structure of Styrene/Acrylic Acid Copolymer in Aqueous Solution Determined by Fourier Transform Infrared Spectroscopy

1987 ◽  
Vol 41 (4) ◽  
pp. 590-596 ◽  
Author(s):  
Marek W. Urban ◽  
Jack L. Koenig ◽  
L. B. Shih ◽  
James R. Allaway
Keyword(s):  
Aqueous Solution ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Acrylic Acid ◽  
Benzyl Alcohol ◽  
Fourier Transform Infrared Spectroscopy ◽  
Fourier Transform Infrared ◽  
Conformational Structure ◽  
Acid Copolymer ◽  
Acrylic Acid Copolymer

A random styrene/acrylic acid copolymer has been examined by Fourier transform infrared spectroscopy with the use of the attenuated total reflectance (ATR) technique, in a study of the conformational structure in aqueous solution. The presence of a base in the aqueous solution leads to ionization of the acrylic acid segments and to conformational changes. The ionization is demonstrated by the appearance of asymmetric and symmetric C-O stretching bands of the COO− ion at 1547 and 1407 cm−1. Our results show that the water molecules are coordinated to the COO− ion through the positively charged cations. The acrylic segments of the copolymer are exposed to the aqueous solvent, whereas styrene is surrounded by acrylates. The molecular interactions of the copolymer in the two-phase water and benzyl alcohol system are determined. In the benzyl alcohol phase, the copolymer forms a coil-type structure, with the acrylic acid segments exposed to the aqueous phase. With time, the cations diffuse into the benzyl alcohol phase and cause ionization of the acrylic acid units, resulting in formation of the COO− ions.

Molecular dynamic simulations of the core–shell microsphere of nanosilica grafted by acrylamide acrylic acid copolymer PAMAA: study of its microstructure and interaction between microsphere and additives

2016 ◽  
Vol 40 (6) ◽  
pp. 5143-5151 ◽  
Author(s):  
Shanshan Dai ◽  
Jinghan Zhang ◽  
Tailiang Zhang ◽  
Zhiyu Huang ◽  
Hongping Quan ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Acrylic Acid ◽  
Molecular Dynamic ◽  
Core Shell ◽  
Molecular Dynamic Simulations ◽  
Dynamic Simulations ◽  
Remarkable Effect ◽  
The Core ◽  
Acid Copolymer ◽  
Acrylic Acid Copolymer

Different additives have a remarkable effect on the microstructure of microsphere in aqueous solution.

Spectroscopic Studies of Interactions between Styrene/Acrylic Acid Copolymer and Sodium Dodecyl Sulfate

1987 ◽  
Vol 41 (6) ◽  
pp. 1028-1032 ◽  
Author(s):  
Marek W. Urban ◽  
Jack L. Koenig
Keyword(s):  
Aqueous Solution ◽  
Fourier Transform ◽  
Sodium Dodecyl Sulfate ◽  
Acrylic Acid ◽  
Sodium Dodecyl ◽  
Spectroscopic Studies ◽  
Infrared Study ◽  
Acid Copolymer ◽  
Dodecyl Sulfate ◽  
Acrylic Acid Copolymer

The results obtained from Fourier transform infrared study of sodium dodecyl sulfate (SDS) in water and in the presence of styrene/acrylic acid (S/AA) copolymer are presented. The C-H stretching band of the SDS hydrocarbon tail at 2929 cm−1 and the O-H stretching of H2O are sensitive to changes in the SDS concentrations. With the increasing concentration both bands are shifted to lower frequency. A mutual presence of S/AA copolymer and surfactant in the aqueous solution leads to a splitting of the bands due to COO− groups. It is proposed that the splitting is due to interactions between COO− segments of the copolymer and the “surfaces” of micelles through the Na+ or Li+ ions.

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