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Studies on the radical polymerization of N-vinyl 2-pyrrolidone initiated by diphenyl ditelluride

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Abstract

N-vinyl pyrrolidone (NVP) was polymerized in dioxan at 60 ± 0.1°C for 1 h using diphenyl ditelluride as radical initiator. The system follows ideal kinetics i.e. R p α [DPDT]0.5[NVP]. The activation energy and dissociation constant is computed as 46 kJ mol−1 and 1.1 × 10−11 s−1, respectively. The polymer was characterized with the help of FTIR, 1H-NMR, 13C-NMR, ESR spectroscopy. The FT-IR spectrum showed bands at 1660–1680 cm−1 due to combination of >C = O and C–N stretching. The gyromagnetic constant ‘g’ has been computed as 2.2203. The main product of this reaction were poly(N-vinylpyrrolidone)s with phenyl tellanyl ends. The presence of tellurium in polymer is confirmed by ICP analysis. The DSC shows the T g of poly(N-vinylpyrrolidone) is 168°C due to rigid pyrrolidane group. The TGA showed that polymer was stable up to 380°C.The GPC studies showed that the weight average molecular weight decreases with increase of [DPDT].

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Acknowledgement

The authors are grateful to Dr. R. P. Singh, Director, H.B.T.I., Kanpur, India, for providing necessary facilities. The authors are also thankful to Director, IIT, Kanpur, Prof. T.M. Aminabhavi, CEPS, Dharwad ,Karnatak for sample analysis.

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  1. Department of Chemistry, H.B. Technological Institute, Kanpur, 208 002, India

    Anjali Tripathi & A. K. Srivastava

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  1. Anjali Tripathi
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  2. A. K. Srivastava
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Correspondence to A. K. Srivastava.

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Tripathi, A., Srivastava, A.K. Studies on the radical polymerization of N-vinyl 2-pyrrolidone initiated by diphenyl ditelluride. J Polym Res 15, 187–193 (2008). https://doi.org/10.1007/s10965-007-9158-y

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