Qualification: 
M.Tech
n_rasana@cb.amrita.edu

Rasana currently serves as Assistant Professor at the Department of Chemical Engineering and Material Sciences, Amrita School of Engineering, Coimbatore. She obtained her Bachelor’s degree in Chemical Engineering from Govt. Engineering College, Calicut University in the year 2006. She received her Master’s degree in Chemical Engineering from Amrita Vishwa Vidyapeetham, Coimbatore campus. Currently she is pursuing her PhD at Amrita Vishwa Vidyapeetham, Coimbatore in “Multiscale Hybrid Thermoplastic Composites” under the guidance of Dr. K. Jayanarayanan. She has 10 years of experience in teaching. Her research interest includes Polymer Processing, Characterization of Composites, Development of Nano and Hybrid Polymer Composites, Thermomechanical Property Modeling of Composites.

Honors/ Awards/ Societies/ Recognitions

  • B. Tech. degree in Chemical Engineering conferred with Distinction and honors, from Calicut University in the year 2006. 
  • Best Paper Award: Won the best paper award for the paper entitled “Influence of multiphase fillers on the mechanical, transport and rheological properties of Polypropylene,” International Conference on Material Sciences (SCICON’16), Dec 2016 (Scopus), Organized by The Department of Sciences, Amrita School of Engineering, Amrita Vishwa Vidypeetham, Coimbatore
  • Board of Studies Member (Chemical Engineering, Amrita Vishwa Vidyapeetham)
  • ISAMPE - Life Member
  • Indian Institute of Chemical Engineers - Life Member

Publications

Publication Type: Journal Article

Year of Publication Publication Type Title

2018

Journal Article

A. Jenifer, Rasana, N., and Dr. Jayanarayanan K., “Synergistic effect of the inclusion of glass fibers and halloysite nanotubes on the static and dynamic mechanical, thermal and flame retardant properties of polypropylene”, Materials Research Express, vol. 5, no. 6, p. 065308, 2018.[Abstract]


Hybrid composites based on polypropylene (PP), glass fiber (GF) and halloysite nanotubes (HNT) were prepared in the presence of a compatibilizer, polypropylene grafted with maleic anhydride (PP-g-MAH), in a twin screw extruder. The properties of the micro composite (PP/GF), nanocomposite (PP/HNT) and hybrid composite (PP/GF/HNT) were studied and compared. The dispersion of the fillers in the base matrix and the effectiveness of the compatibilizer were ascertained by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) and fourier transform infrared spectroscopy (FTIR). The tensile strength and modulus of the hybrid composite prepared in the presence of PP-g-MAH were found to be superior to those of the compatibilized micro and nanocomposites. Differential scanning calorimetry gave insight to the effect of the fillers on modifying the crystallization behavior of the base polymer. The combination of GF and HNT increased the crystallization temperature of PP phase in all the composites. The dynamic mechanical analysis proved that the fillers introduced in the polymer matrix restricted the relaxation of the PP polymer chains as evidenced by the rise in the glass transition temperature (T g ). The thermal stabilities of the hybrid composites were far superior to the neat polymer as the fillers formed an insulating layer delaying the degradation tendency and elevated the activation energy. The flammability of PP could be modified tremendously by the incorporation of the fillers as they reduced the burning rate and raised the limiting oxygen index values.

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2018

Journal Article

N. Rasana and Dr. Jayanarayanan K., “Experimental and micromechanical modeling of fracture toughness”, Journal of Thermoplastic Composite Materials, 2018.[Abstract]


In this study, polypropylene-based nano and hybrid composites are prepared with 20 wt% glass fiber and multiwalled carbon nanotubes (MWCNTs) ranging up to 5 wt%. The multiaxial stress fields developed during external loading of composites cause crack propagation by various fracture mechanisms. Among the nanocomposites, it is observed that the critical stress intensity factor (KI) is highest for the one prepared at 3 wt% loading of MWCNTs. The synergistic effect of multiscale fillers in hybrid composite with MWCNT content of 3 wt% results in superior fracture toughness properties as evidenced by 16.6% increase in KI with respect to neat PP. Analytical expressions that take into account the fracture mechanisms like particle debonding and matrix yielding are employed to estimate the composite crack resistance and then compared with experimentally obtained fracture toughness properties. The fracture toughness properties are found to be dependent on composition of fillers, matrix yield strain, and debonding strain of the composites.

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2017

Journal Article

N. Rasana and Dr. Jayanarayanan K., “Polypropylene/short Glass Fiber/nanosilica Hybrid Composites: Evaluation of Morphology, Mechanical, Thermal, and Transport Properties”, Polymer Bulletin IF:1.430, pp. 1-19, 2017.[Abstract]


In this work, the effect of incorporation of glass fiber and nanosilica separately and in combination in a thermoplastic matrix is investigated. Individual micro, nano, and hybrid multiphase composites based on polypropylene were prepared via twin screw extrusion followed by injection molding. The glass fiber content was maintained at 10 wt{%} and nanosilica level was fixed at 4 wt{%}. The microstructure of the hybrid composite indicated the presence of nanosilica surrounding the glass fibers. Higher tensile strength and modulus was reported for hybrid composite, followed by micro and nanocomposite. The differential scanning calorimetry studies suggested that the presence of glass fibers could hasten the crystallization of PP in comparison with nanosilica. The thermal degradation studies for hybrid composite exhibited a prominent thermal stability. The delayed diffusion of solvent in hybrid composite was observed due to the confinement regions generated by the combination of micro and nanofillers.

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2017

Journal Article

N. Rasana, “Effect of compatibilizer and carbon nanotubes on blends of Polypropylene and Nylon 6: Accepted for Publication (Article in Press)”, Materials Today Proceedings (Scopus) , 2017.

2017

Journal Article

N. Rasana, “Influence of multiphase fillers on the mechanical, transport and rheological properties of Polypropylene: Accepted for Publication (Article in Press)”, Materials Today Proceedings (Scopus), 2017.

Publication Type: Book Chapter

Year of Publication Publication Type Title

2017

Book Chapter

Dr. Jayanarayanan K., Rasana, N., and Mishra, R. Kumar, “Dynamic Mechanical Thermal Analysis of Polymer Nanocomposites”, in Thermal and Rheological Measurement Techniques for Nanomaterials Characterization- (3 volume series) (Scopus), edited by Sabu Thomas, Raghvendra kumar Mishra ,Raju Thomas and Ajesh K. Zachariah, Elsevier Publications, 2017, pp. 123–157.[Abstract]


The objective of this chapter is to establish the use of dynamic mechanical thermal analysis in characterizing polymer nanocomposites. Dynamic mechanical analysis is a powerful tool employed to comprehend thermal transitions of viscoelastic materials by characterizing the evolution of their macromolecular relaxation as a function of temperature and loading frequency. The presence of nanofillers perturbs the relaxation of the polymer chains affecting the stiffness, rigidity, and energy absorbing capability of polymeric materials. The modifications in the viscoelastic behavior of the polymers with the inclusion of nanofillers can be effectively studied from the storage/loss moduli and damping factor spectra obtained from this analysis. In this chapter, the potential of dynamic mechanical thermal analysis is assessed by focusing on the ability of the technique to offer information not only on the viscoelastic performance of filled thermoplastic, thermosets, and elastomeric materials, but also on the miscibility and interface strengthening of polymer blends with nanoinclusions. The various theoretical equations used for modeling dynamic mechanical properties of polymer nanocomposites are discussed in detail.

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Publication Type: Conference Paper

Year of Publication Publication Type Title

2017

Conference Paper

N. Rasana, “Effect of compatibilizer and carbon nanotubes on blends of Polypropylene and Nylon 6”, in International Conference on Advances in Materials and Manufacturing Applications, IconAMMA2017 (Scopus), Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Bangalore , 2017.

2016

Conference Paper

N. Rasana, “Influence of multiphase fillers on the mechanical, transport and rheological properties of Polypropylene”, in International Conference on Material Sciences SCICON’16, (Scopus) , Department of Sciences, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore , 2016.

2014

Conference Paper

N. Rasana, Rangarajan, M., and Dr. Udaya Bhaskar Reddy Ragula, “Design and Implementation of Model Predictive Control in a Three Tank Interacting System”, in International Conference on Recent Advances in Chemical, Environmental and Energy Engineering (RACEEE2014), S.S.N College of Engineering, Chennai, 2014.[Abstract]


An advanced control method, Model Predictive Control (MPC) has been widely used and well received in a wide variety of applications in process control. MPC utilizes an explicit process model to predict the future response of a process and solve a control problem with a finite horizon at each sampling instant. Model predictive control has proven to be a very effective controller design strategy over the last twenty years and has been widely used in process industry, such as oil refining, chemical engineering and metallurgy. A greater challenge for the controllers is to control an unstable system. In this work, a three tank interacting system has been used to implement Model Predictive Control for controlling the level of water in all the three tanks placed at the corners of an equilateral triangle with input, interaction and drain from each tank thus making the system a Multi-Input Multi-Output (MIMO). The appropriate model equations in the non-linear form have been formulated for the proposed system. The non-linear equations are linearized and a state space model was developed and implemented using MPC tool box of MATLAB. MPC simulation environment has been used to design the controller for the three tank interacting system and compared 
the results under various operating conditions including the constraints. The MPC behavior has been analyzed for set point control of the level of water in three tanks by tuning the extent of interaction between the tanks through the openings of solenoid valves connecting the tanks.</p>

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Teachings

Energy Balance and Thermodynamics Heat Transfer in Chemical Engineering/ Process Heat Transfer Chemical Engineering Thermodynamics
Material Balances/ Introduction to Chemical Engineering Numerical Methods in Chemical Engineering Chemical Reaction Engineering
Process Dynamics and Control Process Instrumentation and Control Introduction to Thermodynamics
Polymer Materials-Structure property relations Organic Chemical Technology Engineering Management
Transport Phenomena Environmental Studies Computer Programming
Fluid Mechanics Laboratory Process Dynamics and Control Laboratory Mass Transfer Operations Laboratory
Heat Transfer Laboratory Chemical Reaction Engineering Laboratory Chemical Process Simulation lab using Matlab
Computer Aided Drawing/ CADIAN Engineering Drawing  
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