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Abstract

Urethane methacrylate (UMA) prepolymer was prepared by reacting 2 mole tolylene diisocyanate with 1 mole polyethylene glycol (molecular weight 400) followed by end-capping with 2 mole 2-hydroxyethyl methacrylate in N,N-dimethylformamide (DMF) solvent using stannous octoate as a catalyst. It took 72 h for complete reaction at ambient temperature as determined by monitoring the isocyanate peak at 2269 cm^-1. Ladder-like polysilsesquioxane (LPS) containing side chain methacrylate groups was prepared by stepwise coupling polymerization. Different weight fractions of UMA and LPS in DMF were copolymerized using 1% (w/w) dibenzoyl peroxide at 80°C for 24 h followed by post curing at 100°C for 4-5 h in a nitrogen atmosphere. The copolymers were characterized by Fourier transform infrared analysis, solid-state 13C NMR spectroscopy, differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD) and thermogravimetric analysis. No glass transition temperatures were observed for the copolymers by DSC. The WAXD patterns of copolymers showed a broad peak corresponding to the width of double chain of LPS, indicating the incorporation of LPS in copolymers. These copolymers were more resistant to acid medium. The temperature of 5% weight loss increased with increasing silsesquioxane content in both air and nitrogen atmospheres, and verified the incorporation of LPS in the copolymers.

Keywords

Polysilsesquioxane stepwise coupling polymerization urethane methacrylate

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References

Krishnan P S G , Choudhary V and Varma I K 1993 Rev. Macromol. Chem. Phys. 33 147-147

Holman R and Oldring 1991 UV- and EB-curing Formulation of Printing Inks, Coatings and Paints ( London: SMA )

Bernhard P , Hofmann M , Hunziker M , Klingert B , Schulthess A and Steinmann B 1993 in Radiation Curing in Polymer Science and Technology J P Fouassier and J F Rabek eds ( London-New York: Elsevier Applied Science ) Vol IV p. 216-216

Krishnan P S G and Joshi M 2006 Polysilsesquioxanes: Synthesis and Applications in Polymeric Nanostructures and Their Applications Nalwa H S (ed) ( California: American Scientific Publishers ) Chapter 20

Krishnan P S G , Choudhary V and Varma I K 1992 Polym. Int. 29 131-131

Krishnan P S G , Choudhary V and Varma I K 1992 Polym. Int. 29 73-73

Varma I K , Krishnan P S G and Choudhary V 1990 J. Thermal. Anal. 36 2611-2611

Tyagi A K , Choudhary V and Varma I K 1990 Eur. Polym. J. 26 1171-1171

Tyagi A K , Choudhary V and Varma I K 1992 Eur. Polym. J. 28 423-423

10.

Krishnan P S G 1992 Synthesis and characterization of N-aryl methacrylatoethyl carbamate homopolymers and copolymers, Ph.D. Thesis (Delhi. I. I. T.)

11.

Krishnan P S G , Choudhary V and Varma I K 1993 J. Appl. Polym. Sci. 48 1015-1015

12.

Tyagi A K , Choudhary V and Varma I K 1994 Eur. Polym. J. 30 919-919

13.

Tyagi A K , Choudhary V and Varma I K 1991 Angew. Makromol. Chem. 189 105-105

14.

LiY J , Wang G S and Yan D Y 2001 J.Appl.Polym.Sci. 79 674-674

15.

LiY J , Yan D Y and Wang G S 2001 J.Appl.Polym.Sci. 79 680-680

16.

LiY J , Wang G S and Yan D Y 2001 J.Appl.Polym.Sci. 80 348-348

17.

Ghazaly H M , Daniels E S , Dimonie V L , Klein A and El-Aasser M S 2001 J. Appl. Polym. Sci. 81 1721-1721

18.

Sorokin M F, Shode L G, Onosova L A and Guseva O F 1979 Copolymerization of urethane acrylate and butyl methacrylate, Deposited Doc (VINITI 1836-79) 12 pp

19.

Gudzera S S , Spirin Yu L , Magdinets V V and Maslyuk A F 1973 Polimerov 12 101-101

20.

Krishnan P S G and He C 2005 J. Polym. Sci. Part A Polym. Chem. 43 2483-2483

21.

Krishnan P S G and He C 2003 Macromol. Chem. Phys. 204 531-531

22.

Ghosh S and Krishnamurti N 2001 Polym-Plast Technol Eng 40 539-539

23.

Wang J W , He C , Lin Y H and Chung T S 2002 Thermochim. Acta 381 83-83

Copolymerization Studies of Urethane Methacrylate and Ladder-Like Polysilsesquioxane Containing Side Chain Methacrylate Groups

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