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Email Verified RaghavendraKumar Rangappa
Member since November 24, 2022

I am RaghavendraKumar R, writing this letter to you inquiring about the possibility of obtaining a postdoctoral position within your esteemed research group. I would like to introduce myself, I'm currently a fourth-year Ph.D. student at the National Taiwan University of science and technology, Taiwan. My thesis focuses on the preparation of microcellular thermoplastic polyurethane foam using CO2 and N2 blowing agents. My interest is raised working on biodegradable foam for food packaging applications. I will give a defense in December. Having studied the research interest and the research description of your research group. I feel privileged in seeking a postdoctoral position in your group. If you have any position openings in your group please let me know.

     I am Raghavendrakumar R. applying for a postdoctoral researcher position in your group. Currently, I am pursuing a Ph.D. degree from the National Taiwan University of science and Technology.Previously, I have been working on “Transition metal complexes: Synthesis, characterization and antimicrobial studies” as a Research Assistant. During that period, I synthesized four novel indole hydrazones derived from indole-3-carbaldehyde, developed single–crystal growth, and characterized and studied their complexation to transition metals with an emphasis on copper, cobalt, and nickel. I have also been working as a Junior Research Fellow on DRDO funded project “Development of the process of carboxylatednitrile butadiene latex” and a Pidilite Industries–funded project on “Development of an emulsion polymer having core-shell morphology for use in formulating interior water-based fluoro-acrylic paints” Simultaneously, I conducted experiments on the synthesis of new reactive surfactants like graphene modified surfactants, cardanol based reactive surfactants (derived from renewable resource), these surfactants used in fluoroemulsion as a superhydrophobic application at Polymers & Functional Materials Division in the CSIR- Indian Institute of Chemical Technology-India. Besides, I also have strong hands-on experience running various instruments such as IR, UV-Vis, GPC, DSC, DMTA, TGA, TMA, UTM, DHR 20 Rheometer, FE SEM, and Contact angle. My research expertise and credentials are:

            In my doctoral dissertation, my research focuses on the (1) Production of TPU bead foams via batch autoclave foaming using CO2 and N2 blowing agents, (2) Polymer processing: Extrusion and Mini injection molding, (3) Microcellular foaming technology: Batch foaming LDPE/Cyclic Block Copolymers (CBC) blends (USI Corporation LTD.) (4) Thermoplastic polyurethanes synthesis. (5) Assessment of Evonik Nanostructured Silica as a nucleating agent for sc-CO2 physical foaming of TPEs (Evonik industries project) Moreover, having had a formal education in chemistry, I have acquired knowledgeof polymer chemistry and materials science as reflected in my technical expertise (please see my CV for additional details).

My thesis focuses on the preparation of microcellular thermoplastic polyurethane foam using CO2 and N2 blowing agents. During my Ph.D., I studied the extensive effect of process parameters like hardness, extrusion, and blowing agent. In addition, my first-year Ph.D. has synthesized thermoplastic polyurethanes. The porous thermoplastic polyurethane is widely used in various engineering applications. My interest is raisedworking on insitu foam 3D printing. Porous foam-based complex geometries have applications in high-tech industries like architecture, automotive, aircraft, energy, and biomedicine.

Thus, I believe I possess the right qualities and skills to contribute significantly to the research. As a researcher, I am committed to new challenges in any field of research and work with team members from diverse areas. I will be glad to provide any further information you might need to make your decision. I can also make myself available for the Ph/Skype/Zoom/Google meet interview at the time of your convenience.

I am enclosing my curriculum vitae (including the list of publications and contact information of my referees) for your reference.

Thank you for your consideration, and I look forward to hearing from you.

Thanks and regards

Raghavendrakumar R

Email id: raghavendrakr123@gmail.com

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2

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List of Publications (Papers, Book Chapters, Reviews, etc.)

Effect of N2 plasticization on the crystallization of different hardness of thermoplastic polyurethanes Journal of Supercritical Fluids 189: 105726.

Effect of N2 plasticization on the crystallization of different hardness of thermoplastic polyurethanes Journal of Supercritical Fluids 189: 105726.

https://doi.org/10.1016/j.supflu.2022.105726.
Effect of extrusion on the foaming behavior of thermoplastic polyurethane with different hard segments. Shu-Kai Yeh*, Raghavendrakumar Rangappa, Ting-Hao Hsu, and Stephen Utomo Journal of Polymer Research, 28(7),

Effect of extrusion on the foaming behavior of thermoplastic polyurethane with different hard segments. Shu-Kai Yeh*, Raghavendrakumar Rangappa, Ting-Hao Hsu, and Stephen Utomo Journal of Polymer Research, 28(7),

https://doi.org/10.1007/s10965-021-02604-z
Effect of amphiphilic polymer-modified graphene surfactant on the thermal, viscoelastic and tensile properties of nitrile latex nanocomposites. Raghavendrakumar R. and K.I. Suresh* Journal of Macromolecular Science, Part B. Physics 2019;489-504.

Effect of amphiphilic polymer-modified graphene surfactant on the thermal, viscoelastic and tensile properties of nitrile latex nanocomposites. Raghavendrakumar R. and K.I. Suresh* Journal of Macromolecular Science, Part B. Physics 2019;489-504.

https://doi.org/10.1080/00222348.2019.1590986.

Fabrication of low shrinkage microcellular thermoplastic polyurethanes foams by supercritical N2 Journal of Supercritical Fluids

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Effect of Polyamide and Crosslinking Agent on the Foam ability of PEBAX Foam Shu-Kai Yeh, Yen-Ming Huang, Raghavendrakumar Rangappa, Shaochun Chao,

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The effect of talc and nanostructured silica on the thermal, rheology and foaming behavior of Thermoplastic polyurethane (Under Preparation). Aashir Azhar, Muluberhan Yelak, RaghavendraKumar Rangappa and Chia-Yun Li, Shu-Kai Yeh

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List of Conference/Congress/Symposium Attendance

  • Presented paper at the 2022 SPE FOAMS® Tutorial and Conference in Indianapolis, USA. “Fabrication of low shrinkage microcellular thermoplastic polyurethanes foams by supercritical N2” Raghavendrakumar Rangappa, and Shu-Kai Yeh* (2022)

  • Fabrication of low shrinkage microcellular thermoplastic polyurethanes foams by supercritical N2”

  • Oral Presentation

  • Attended and presented poster 2020 polymer society annual meeting Organized by the Department of Chemical and Materials Engineering, National Qinyi University of Science and Technology, Taichung, Taiwan. “Fabrication of microcellular thermoplastic polyurethanes foams by supercritical N2: Effect of process parameter on its properties” Raghavendrakumar Rangappa, and Shu-Kai Yeh* (2022)

  • “Fabrication of microcellular thermoplastic polyurethanes foams by supercritical N2: Effect of process parameter on its properties”

  • Poster presentation

  • Attended and presented poster at the international conference, SUCHEM-2018 held at CSIR-IICT, Hyderabad, India. “Synthesis, Characterization, and Evaluation of New Reactive Surfactant from Hydrogenated Cardanol for Acrylic Emulsion Polymerization” Raghavendrakumar R, N.Rajendar, Namita Chandran and K.I.Suresh (2018)

  • Poster presentation

  • Presented paper at the 11th International High Energy Material Conference and Exhibits (HEMCE-2017) Pune, India “Amphiphilic Polymer Modified Graphene Surfactant: Effect on Thermal Stability and Mechanical Properties of Carboxylated Nitrile Latex Nanocomposites”. K.I.Suresh*, Raghavendrakumar R, Osman Ali, and T. Shekharam (2017)

  • “Amphiphilic Polymer Modified Graphene Surfactant: Effect on Thermal Stability and Mechanical Properties of Carboxylated Nitrile Latex Nanocomposites”. K.I.Suresh*, Raghavendrakumar R, Osman Ali, and T. Shekharam

  • Oral Presentation

  • Attended and presented poster 7th Annual KSTA National Conference -2015. Organized by Karnataka Science and Technology Academy (KSTA) and The Oxford College of Science, Bangalore, Karnataka, India. “Synthesis and spectral characterization of novel indole hydrazones of indole-3-carbaldehyde”. Riya Datta*, Raghavendrakumar R, Sunaja Devi K.R and Sreeja P.B. (2015)

  • Synthesis and spectral characterization of novel indole hydrazones of indole-3-carbaldehyde”.

  • Poster presentation

  • Attended and presented poster 6th Annual KSTA National Conference -2013. Organized by Karnataka Science and Technology Academy (KSTA) and Christ University, Bangalore, Karnataka, India. “Synthesis and spectral characterization of novel acyl hydrazones of p-acetamidobenzaldehyde”. Riya Datta*, Raghavendrakumar R, Sunaja Devi K.R and Sreeja P.B. (2013)

  • Synthesis and spectral characterization of novel acyl hydrazones of p-acetamidobenzaldehyde”.

  • Poster presentation

Work Experience(s)

Research Assistant

  •  Christ University
  •  Dec 2014 - Nov 2022

At Christ University., I was involved in the project “Transition metal complexes: Synthesis, characterization and antimicrobial studies”.
• I have synthesized four novel indole hydrazones derived from indole-3-carbaldehyde and other sources were synthesized and characterized and to study their complexation to transition metals with an emphasis on copper, cobalt, and nickel.

Junior Research Fellow

  •  CSIR-Indian Institute of Chemical Technology
  •  Jul 2016 - Jan 2019

As a JRF (DRDO project), I was joined under the project “Development of process of carboxylated butadiene nitrile latex (XNBR)”.
• I have a stronghold on the synthesis aspects of XNBR
• Experience and Knowledge of batch and semi-batch scale-up process of XNBR emulsion polymerization.
• Good experience in nitrile rubber compounding, using additives and fillers like carbon filler, graphene, and formulation development.
• As a JRF (Pidilite industries project), I was joined under the project “Development of an emulsion polymer having core-shell morphology for use in formulating interior water-based paints”.
• Optimization of emulsion polymerization of fluoroacrylate
• To modify the surface property of polyacrylate latex films using a small amount of expensive fluorinated acrylate.
• Optimize the development of an emulsion polymer with core-shell morphology for formulating interior water-based paints.

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