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13. Contributors

Author

Akpinar, Serkan, primary, Alagar, M., additional, Anil Kumar, S., additional, Aytac, Ayse, additional, Bekin Acar, Seda, additional, Çakmakçi, Emrah, additional, Celik Kucuk, Asuman, additional, Chen, Mi, additional, Cheng, Wei, additional, Chua, Ming Hui, additional, Chung, Tai-Shung, additional, Cotofana, Corneliu, additional, Dehghani, Mostafa, additional, Devaraju, S., additional, Hazer, Seda, additional, Hemmati, Alireza, additional, Kabra, Shruti, additional, Kalarikkal, Nandakumar, additional, Kandasubramanian, Balasubramanian, additional, Kausar, Ayesha, additional, Kodal, Mehmet, additional, Le, Ngoc Lieu, additional, Lei, Bo, additional, Leng, Tongtong, additional, Luo, Meng, additional, Mesbah, Mohammad, additional, Mohseni, Mohsen, additional, Mondal, Prantik, additional, Murariu, Mioara, additional, Niu, Wen, additional, Nosar, Mahdi Naseri, additional, Oancea, Andrei-Victor, additional, Olaru, Mihaela, additional, Ozdogan, Reyhan, additional, Ozkoc, Guralp, additional, Pazirofteh, Mahdieh, additional, Ponnupandian, Siva, additional, Rao, YuanQiao, additional, Raut, Sagar Kumar, additional, Rezakazemi, Mashallah, additional, Rhee, Hee-Woo, additional, Romo-Uribe, Angel, additional, Rusu, Bogdan George, additional, Saha, Biswadeep, additional, Sarkar, Biswajit, additional, Sharma, Amit K., additional, Simionescu, Bogdana, additional, Singh, Rahul, additional, Singha, Nikhil K., additional, Somasekharan, Lakshmipriya, additional, Stephen, Ranimol, additional, Swapna, V.P., additional, Tandon, Saloni, additional, Tasdelen, Mehmet Atilla, additional, Thomas, Sabu, additional, Ullah, Muhammad Saeed, additional, Ursu, Cristian, additional, Wang, Min, additional, Wang, Yidan, additional, Wiggins, Jeffrey S., additional, Xie, Chenxi, additional, Xu, Jianwei, additional, Yahyaei, Hossein, additional, Yong, Wai Fen, additional, Zaharescu, Traian, additional, and Zhou, Hui, additional

Published
2021
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15. List of contributors

Author

Abhisha, Vakkoottil Sivadasan, primary, Banerjee, Amritanshu, additional, Cai, Di, additional, Chirayil, Cintil Jose, additional, Choudhury, Swastika, additional, Elizabeth, Asha, additional, Francis, Bincy, additional, George, Deepak Roy, additional, George, Gejo, additional, George, Neenu, additional, George, Soney C., additional, John, Neetha, additional, Jose, Thomasukutty, additional, Joy, Jithin, additional, Kadja, G.T.M., additional, Kathiresan, Geetha, additional, Khoiruddin, K., additional, Mohammadi, Toraj, additional, Mujiburohman, Muhammad, additional, Mukti, Rino R., additional, Nair, Abhinav K., additional, M., Naveen Rooba Doss, additional, Pyne, Debapriya, additional, Qin, Peiyong, additional, Ray, Samit Kumar, additional, Salt, Inci, additional, Salt, Yavuz, additional, Sethu Lakshmi, M.B., additional, Shan, Houchao, additional, Si, Zhihao, additional, Stephen, Ranimol, additional, Sutrisna, Putu D., additional, Swapna, Valiya Parambath, additional, Thomas, Sabu, additional, Tirnakci, Berk, additional, Tofighy, Maryam Ahmadzadeh, additional, Tyni, Shalin, additional, Wenten, I.G., additional, and Wilson, Runcy, additional

Published
2020
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19. Thermal properties of poly (vinyl alcohol)(PVA)/halloysite nanotubes reinforced nanocomposites

Author

V.P., Swapna, P., Selvin, K.I., Suresh, V., Saranya, M.P., Rahana, and Stephen, Ranimol

Abstract

Natural halloysite nano clay with tubular structure was used for the preparation of polyvinyl alcohol (PVA) nanocomposites. A systematic and detailed study was conducted on the effect of nanotubes on the properties such as flame retardancy, water absorption capacity, and thermal stability of poly (vinyl alcohol) matrix. Morphological and structural characterizations of nanocomposites were performed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and fourier transform infra red (FTIR) spectroscopy. XRD results showed peak broadening and disappearance in nanocomposites when compared to the peaks for nanotubes, indicating the better dispersion of nanotubes in the matrix. Owing to the hydrophilicity of nanotubes the nanocomposites exhibited enhanced water sorption properties. At higher temperature nano filler reinforced PVA showed better thermal stability and flammability due to barrier effect.

Published
2024
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21. Kinetic studies on the transport behavior of hybrid filler incorporated natural rubber (NR).

Author

Abhisha, Vakkoottil Sivadasan, Sisanth, Krishanagegham Sidharathan, Thomas, Sabu, and Stephen, Ranimol

Subjects
CARBON-black, CARBON nanotubes, DIFFUSION control, RUBBER, VULCANIZATION
Abstract

Conductive carbon black (CCB), carbon nanotubes (CNT) and its hybrids are introduced into the natural rubber (NR) matrix aiming to explore the effect of filler ratio on the transport properties. Solvent transport of NR is found to decrease for hybrid filler systems as compared to single filler incorporated systems. Kinetic parameters of solvent transport behavior of filled NR systems are analyzed using various kinetic models. Upon the computation of kinetic parameters of transport data, it is found that the Peppas-Sahlin model is in good agreement with experimental observations, which suggests that the transport mechanism is diffusion controlled. Rubber-filler interaction parameters are computed and analyzed from the swelling experiments using Kraus, Cunneen-Russel, and Lorenz-Park equations. [ABSTRACT FROM AUTHOR]

Published
2023
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23. List of Contributors

Author

Abhisha, Vakkoottil S., primary, Abitha, Vayyaprontavida Kaliyathan, additional, Abraham, Jiji, additional, S., Anil Kumar, additional, Bartovská, Lidmila, additional, Bazargani, Zohreh, additional, Catalá, Ramón, additional, Cerisuelo, Josep Pasqual, additional, Chandran, Anoop, additional, Chung, Tai-Shung, additional, Compañ, V., additional, del Castillo, L.F., additional, Follain, Nadège, additional, Francis, Bincy, additional, Gavara, Rafael, additional, George, Gejo, additional, George, Neenu, additional, George, Soney C., additional, Gopalakrishnapanicker, Unnikrishnan, additional, Gupta, Vinod Kumar, additional, Hafusa, Akhina, additional, Hernandez-Muñoz, Pilar, additional, James, Jose, additional, Jose, Ajith J., additional, Jose, Thomasukutty, additional, Joseph, Kuruvilla, additional, Joseph, Shiny, additional, Joy, Jithin, additional, Kaippamangalath, Nimisha, additional, Kappen, Jincymol, additional, Krishnan, Vipin G., additional, Lakshmipriya, Ravindran, additional, Lovely Mathew, P., additional, Marais, Stéphane, additional, Maria, Hanna J., additional, Mohammadi, Toraj, additional, Moni, Grace, additional, Nair, Sharika T., additional, Parvasi, Payam, additional, Raj, Midhun C., additional, Randová, Alena, additional, Rezakazemi, Mashallah, additional, Sabzi, Fatemeh, additional, Sadrzadeh, Mohtada, additional, Sandhya, Pattoorpady K., additional, Sankar, Nivedita, additional, Sebastian, Anila, additional, Sethi, Bhavana, additional, Sethu Lakshmi, Maruvathukavunkal Balakrishnan, additional, Sreekala, Meyyarappallil S., additional, Stephen, Ranimol, additional, Su, Jincai, additional, Swapna, Valiya P., additional, Thomas, George V., additional, Thomas, Jince, additional, Thomas, Meghana M., additional, Thomas, Sabu, additional, Unnikrishnan, Nellipparambil V., additional, Wilson, Runcy, additional, and Zachariah, Ajesh K., additional

Published
2018
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31. Changes in free volume and gas permeation properties of poly(vinyl alcohol) nanocomposite membranes modified using cage‐structured polyhedral oligomeric silsesquioxane

Author

Swapna, Valiya Parambath, primary, Kaliyathan, Abitha Vayyaprontavida, additional, Abhisha, Vakkoottil Sivadasan, additional, Maria, Hanna Joseph, additional, Nambissan, Padinharu Madathil Gopalakrishnan, additional, Thomas, Sabu, additional, and Stephen, Ranimol, additional

Published
2020
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36. Changes in free volume and gas permeation properties of poly(vinyl alcohol) nanocomposite membranes modified using cage‐structured polyhedral oligomeric silsesquioxane.

Author

Swapna, Valiya Parambath, Kaliyathan, Abitha Vayyaprontavida, Abhisha, Vakkoottil Sivadasan, Maria, Hanna Joseph, Nambissan, Padinharu Madathil Gopalakrishnan, Thomas, Sabu, and Stephen, Ranimol

Subjects
SILICONES, POLYVINYL alcohol, CETYLTRIMETHYLAMMONIUM bromide, POSITRON annihilation, CARBON dioxide, ETHYLENE oxide, DOPPLER broadening
Abstract

The present work reports the effect of various organically functionalized polyhedral oligomeric silsesquioxane (POSS) particles on the gas transport properties (N2, O2, and CO2 molecules) in poly(vinyl alcohol) (PVA) membranes. The incorporation of polyethylene glycol‐POSS (PEG‐POSS), octa‐tetramethylammonium‐POSS (Octa‐TMA‐POSS) and m‐POSS (Octa‐TMA‐POSS molecule was modified using cetyltrimethyl ammonium bromide) led to the enhancement in CO2 separation performance of PVA, among which, PEG‐POSS exhibited highest CO2 separation due to the dipole‐quadrupolar interaction of CO2 with ethylene oxide group in POSS. Octa‐TMA‐POSS and m‐POSS reduced the O2 and N2 permeability of the PVA membrane due to the reduction in the number of permeating pathways as compared to pure PVA. Free volume of the membranes was evaluated by positron annihilation lifetime spectroscopic (PALS) and coincidence Doppler broadening measurements. PALS confirms the increase in polymer free volume in PVA/POSS system due to the presence of rigid and spherical POSS molecule, which could enter in the polymer chain and provide viable pathway for molecular transport. Maxwel–Wagner–Sillar and Higuchi models were applied for the theoretical prediction of permeability of the fabricated membranes. [ABSTRACT FROM AUTHOR]

Published
2021
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38. Free volume defects and transport properties of mechanically stable polyhedral oligomeric silsesquioxane embedded poly(vinyl alcohol)‐poly(ethylene oxide) blend membranes

Author

Swapna, Valiya Parambath, primary, Nambissan, Padinharu Madathil Gopalakrishnan, additional, Thomas, Selvin P, additional, Vayyaprontavida Kaliyathan, Abitha, additional, Jose, Thomasukutty, additional, George, Soney C, additional, Thomas, Sabu, additional, and Stephen, Ranimol, additional

Published
2019
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40. Effect of halloysite nanotubes and organically modified bentonite clay hybrid filler system on the properties of natural rubber.

Author

Abhisha, VS, Augustine, Aneeta, Joseph, Jesna, Thomas, Selvin P, and Stephen, Ranimol

Subjects
HYBRID systems, CLAY, ENERGY dissipation, FRACTURE mechanics, NANOCOMPOSITE materials, RUBBER, NANOTUBES
Abstract

The versatility and potential have framed natural rubber (NR) nanocomposites as the focal point in the polymer research field and industry. Currently, NR nanocomposites filled with hybrid nanostructures is an interesting area than single filler or conventional filler systems. Halloysite nanotube (HNT) and bentonite clay are well-studied potential fillers of polymers. This work is an attempt to study the effect of hybrid filler system of HNT and organically modified bentonite nanoclay (NC) in the properties of NR. NR/HNT-NC systems with varied filler concentrations were prepared in a two-roll mixing mill. Properties such as cure characteristics, morphology, mechanical, thermal, and transport behavior were analyzed in detail. The prepared composites had better wear properties than gum vulcanizates. Improvement in physical properties was observed due to the increased contact surface area between the filler and the matrix. The nanocomposite with 2 wt% hybrid filler shows a 31% decrease in abrasion loss compared to neat NR composite. Apparently, 4 wt% of hybrid filler could improve modulus at 300% strain and tear by approximately 57% and 14%, respectively. The ability to withstand high strain was evident from the improved crack growth resistance as observed in micrographs. Lorenz–Park plots were employed to analyze the rubber–filler interaction. The activation energy of thermal degradation was calculated using Coats–Redfern equation. [ABSTRACT FROM AUTHOR]

Published
2020
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45. Mechanical and swelling behavior of green nanocomposites of natural rubber latex and tubular shaped halloysite nano clay.

Author

Swapna, V.P., Stephen, Ranimol, Greeshma, T., Sharan Dev, C., and Sreekala, M.S.

Subjects
*LATEX, *HALLOYSITE, *CLAY, *NANOCOMPOSITE materials, *SWELLING of materials, *MECHANICAL behavior of materials
Abstract

Nanocomposites based on natural rubber latex as the matrix and naturally occurring tubular shaped nanoclay, halloysite nanotubes (HNTs) as the reinforcing phase were prepared through co-coagulation method. XRD, morphology, mechanical, and solvent transport properties of the nanocomposites with special reference to weight percentage of nanoclay were analyzed and discussed in detail. Matrix-filler interaction was estimated from Kraus, Cunneen-Russell, and Lorentz-Park plots. Theoretical estimation of reinforcement effect revealed a better interaction between rubber and filler at lower concentration of filler. At higher loading properties decreased due to the formation of filler-filler networks than polymer-filler networks resulting in the reduction of aspect ratio of fillers. Properties of nanocomposites depend on the aspect ratio and volume fraction of reinforcing filler. Morphological analyses of the nanocomposites were done in detail from scanning electron micrographs. Theoretical modulus of nanocomposites was computed using different composite theories by varying the aspect ratio of filler and compared with experimental data. A good agreement between experimental and theoretical values was observed at lower concentration of filler. Solvent transport properties of nanocomposites were found to decrease at lower concentration of HNT because of the tortuosity of the path. POLYM. COMPOS., 37:602-611, 2016. © 2014 Society of Plastics Engineers [ABSTRACT FROM AUTHOR]

Published
2016
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