Synthesis and chemical modification of maleic anhydride copolymers with phthalimide groups

International Journal of Industrial Chemistry

دوره 4، شماره 1، اسفند 2013، صفحه 68-75

نوع مقاله: research article

شناسه دیجیتال (DOI): https://doi.org/10.1186/2228-5547-4-11

نویسندگان

Mohammad Hossein Nasirtabrizi^* ؛ Zeinab Mohammadpoor Ziaei؛ Aiyoub Parchehbaf Jadid؛ Leila Zare Fatin

Department of Applied Chemistry, Islamic Azad University, Ardabil Branch, Ardabil, 5614633167, Iran

چکیده

Background
Maleic anhydride (MAN) copolymers with methyl methacrylate, ethyl methacrylate, methyl acrylate, ethyl acrylate, and butyl acrylate monomers at 1:1 mole ratios were synthesized by free radical polymerization in the presence of α,α′-azobis(isobutyronitrile) as initiator and dry ethyl acetate as solvent.
Results
Copolymer compositions were obtained using related proton nuclear magnetic resonance (¹HNMR) spectra, and the polydispersity of the copolymers was determined by gel permeation chromatography. Then, a solution of phthalimide salt as a nucleophilic reagent reacted through the ring opening of anhydride groups in copolymers resulting to modified copolymers I_Pht to V_Pht. All the prepared polymers were characterized by Fourier transform infrared and ¹H NMR spectroscopic techniques. The glass transition temperature (T_g) of all copolymers before and after modification was determined by dynamic mechanical thermal analysis (DMTA).
Conclusions
It was shown that chemical modification of MAN copolymers with phthalimide substituents as side chains decreased the free volume of the polymers, and therefore, the rigidity and T_g are increased. Solubility of the copolymer products was tested in some organic solvents.

کلیدواژه‌ها

Maleic anhydride copolymers؛ Chemical modification؛ DMTA؛ Tg؛ MAN؛ Phthalimide