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Study on Biodegradable Poly(α-Olefins–co–α-Pinene) Architectures as Pour Point Depressant and Viscosity Index Improver Additive for Lubricating Oils

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Abstract

Three different poly(α-olefins–co–α-pinene) copolymers were synthesized by the reaction of α-pinene with three different α-olefins as 1-dodecene, 1-hexadecene, 1-octadecene, respectively by free radical polymerization initiated by azobisisobutyronitrile. All the three copolymers Pn-Dd, Pn-Hd, and Pn-Od were characterized using Fourier-transform infrared spectroscopy (FT-IR), nuclear magnetic spectroscopy (NMR). Gel permeation chromatography (GPC) analysis was used for molecular weight determination while the thermal gravimetric analysis (TGA) was used for determining the thermal stability. After successful molecular characterization of these copolymers, application studies were carried out in MAK-500 (mineral lube base oil) as viscosity index improver (VII) and pour point depressant (PPD) additive. The four-ball tests were also performed on the additive blended samples to observe if these copolymers had any adverse effect on tribological properties. All the synthesized additives were found to be effective as an additive. But Pn-Od was found to be most effective without imposing any adverse effect on antiwear and antifriction characteristics of base oil. The biodegradability of all these polymers was determined as per ASTM D5864. Pn-Dd showed the highest ease of biodegradation.

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Acknowledgements

The authors kindly acknowledge the Director, CSIR-IIP for his permission to publish these results. The authors thank the analytical science division of CSIR-IIP for providing the analysis. Authors also thank Forest Research Institute and Doon University, Dehradun for providing the analysis.

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Authors and Affiliations

  1. Academy of Scientific and Innovative Research (AcSIR), Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh, 201 002, India

    Ekta Faujdar & Himani Negi

  2. Analytical Science Division, CSIR-Indian Institute of Petroleum, P.O. Mohkampur, 248 005, Dehradun, Uttarakhand, India

    Ekta Faujdar, Himani Negi & Raj K. Singh

  3. Chemistry & Bioprospecting Division, Forest Research Institute, Dehradun, Uttarakhand, 248 195, India

    Vinay K. Varshney

Authors
  1. Ekta Faujdar
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  2. Himani Negi
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  3. Raj K. Singh
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  4. Vinay K. Varshney
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Correspondence to Raj K. Singh or Vinay K. Varshney.

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Faujdar, E., Negi, H., Singh, R.K. et al. Study on Biodegradable Poly(α-Olefins–co–α-Pinene) Architectures as Pour Point Depressant and Viscosity Index Improver Additive for Lubricating Oils. J Polym Environ 28, 3019–3027 (2020). https://doi.org/10.1007/s10924-020-01815-7

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  • DOI: https://doi.org/10.1007/s10924-020-01815-7

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