The effect of salt and pH on the phase transition behaviors of pH and temperature-responsive poly(N,N-diethylacrylamide-co-methylacrylic acid) | Zendy

Tonghuan Liu | Zendy; Jian Fang | Zendy; Ya-Ping Zhang | Zendy; Zhengzhi Zeng | Zendy

Open Access

The effect of salt and pH on the phase transition behaviors of pH and temperature-responsive poly(N,N-diethylacrylamide-co-methylacrylic acid)

Author(s) -

Tonghuan Liu,

Jian Fang,

Ya-Ping Zhang,

Zhengzhi Zeng

Publication year - 2008

Publication title -

macromolecular research

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.491

H-Index - 49

eISSN - 2092-7673

pISSN - 1598-5032

DOI - 10.1007/bf03218579

Subject(s) - copolymer , salt (chemistry) , materials science , phase transition , fourier transform infrared spectroscopy , phase (matter) , nanochemistry , transition temperature , polymer chemistry , chemical engineering , chemistry , polymer , organic chemistry , nanotechnology , thermodynamics , physics , engineering , composite material , superconductivity , quantum mechanics

A series of pH and temperature-responsive (N,N-diethylacrylamide-co-methylacrylic acid) copolymers were synthesized by radical copolymerization and characterized by elemental analysis, Fourier-transform infrared (FT-IR), nuclear magnetic resonance (NMR)1H,13C and LLS. The effects of salt and pH on the phase transition behaviors of the copolymers were investigated by UV. With increasing NaCl concentration, significant salt effects on their phase transition behaviors were observed. UV spectroscopic studies showed that the phase transition became faster with increasing NaCl concentration. In addition, the phase transition behaviors of copolymers were sensitive to pH. The pH and temperature sensitivity of these copolymers would make an interesting drug delivery system.

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