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Polymerization of N-vinyl caprolactam by ultrasound aided dual-sited phase transfer catalytic conditions

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Abstract

This work demonstrates the successful polymerization of N-vinyl caprolactam using dual-sited phase-transfer catalyst and potassium persulfate as conventional radical initiator in cyclohexane-aqueous media at 60 ± 2 °C under normal and ultrasound environment with 45 kHz power of 550 W. Dual-sited phase-transfer catalyst acts as a gear to accelerate the reaction in a two-phase system and along with ultrasound circumstance reaction rate was effectively improved. We observed that the polymerization rate was significantly increased with an increase of concentration of different reaction parameters and also presence of ultrasound environment rate was doubled than with normal condition. Activation energy value of polymerization reaction validates the doubling of polymerization rate. The various reaction parameters (frequency, monomer, initiator, catalyst, and temperature) on the polymerization rate were explored under normal and ultrasound condition. Acquired poly(N-vinyl caprolactam) was validated and characterized by different analyses.

Polymerization of NVCL by dual-sited phase transfer catalyst with ultrasound condition

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Funding

The authors (VM) thanks the Science and Engineering Research Board (DST-SERB), New Delhi for the start-up research Grant No.SB/FT/CS-008/2014.

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Authors and Affiliations

  1. Department of Chemistry, B S Abdur Rahman Crescent Institute of Science and Technology, Chennai, 600 048, India

    Elumalai Marimuthu & Vajjiravel Murugesan

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  1. Elumalai Marimuthu
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  2. Vajjiravel Murugesan
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Correspondence to Vajjiravel Murugesan.

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Highlights

• Facile and effective polymerization of N-vinyl caprolactam by dual-sited PTC

• Ultrasound condition was doubled the rate on comparison with normal condition

• Role of various parameters on polymerization rate was explored in both conditions

• Based on the observed experimental results suitable mechanism was proposed

• Obtained poly (N-vinyl caprolactam) was analyzed by different spectral techniques

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Marimuthu, E., Murugesan, V. Polymerization of N-vinyl caprolactam by ultrasound aided dual-sited phase transfer catalytic conditions. Adv Compos Hybrid Mater 2, 670–680 (2019). https://doi.org/10.1007/s42114-019-00128-1

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  • DOI: https://doi.org/10.1007/s42114-019-00128-1

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