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Parthasarathy V.,Ayya Nadar Janaki Ammal College | Sundaresan B.,Ayya Nadar Janaki Ammal College | Dhanalakshmi V.,KCET | Anbarasan R.,National Taiwan University
Polymer Engineering and Science | Year: 2010

High-density polyethylene (HDPE) was graft functionalized with two different mercaptoesters in an inert atmosphere at 160°C under different experimental conditions by thermolysis method. The order of functionalization, crosslinking, and C=C formation reactions were determined from the relative intensities of carbonyl stretching vibration and C-H bending vibrations. FTIR, DSC, and TGA analytical tools were used to characterize mercaptoester- functionalized HDPE. A plausible reaction mechanism is proposed here to explain the experimental results obtained. POLYM. ENG. SCI., 50:474-483, 2010. © 2009 Society of Plastics Engineers.

Anbarasan R.,National Taiwan University | Kanchana S.,SFR College for women | Gayathri S.,SFR College for women | Jayalakshmi T.,SFR College for women | Dhanalakshmi V.,KCET
Journal of Applied Polymer Science | Year: 2010

Linear low-density polyethylene (LLDPE) was functionalized with succinimide under different experimental conditions like change in time, temperature, and (% weight of succinimide). The FTIR Spectrum inferred that melt grafting of succinimide onto LLDPE followed the 0.50 order of reaction with respect to (% weight of succinimide). DSC was used to analyze the (melting temperature) T m and (crystallization temperature) Tc values of functionalized LLDPE. Free radical mechanism explained the formation of nitroxide radical during the melt functionalization of N-hydroxy succinimide (NHS) with LLDPE in the presence of dicumyl peroxide. © 2009 Wiley Periodicals, Inc.

Singh T.,KCET | Singh J.,B.C.E.T
Wireless Networks | Year: 2016

The design of routing protocol with energy efficiency and security is a challenging task. To overcome this challenge, we propose energy-efficient secured routing protocol. The objective of our work is to provide a secured routing protocol, which is energy efficient. To provide security for both link and message without relying on the third party, we provide security to the protocol by choosing a secure link for routing using Secure Optimized Link State Routing Protocol. Each node chooses multipoint relay nodes amongst the set of one-hop neighbors, so as to reach all two-hop neighbors. The access control entity authorizes nodes announcing the node identification to the network. In addition, the access control entity signs a public key Ki, a private key ki, and the certificate Ci required by an authorized node to obtain the group key. Each node maintains a route table with power status as one of its entry. After selecting the link, on requirement of a new route, we check nodes’ power status in its routing table and then accordingly arise a route. Then, we perform group key distribution using the generated keys using a small number of messages which helps reducing energy consumption. The group key can be altered periodically to avoid nonauthorized nodes and to avoid the use of the same group key in more than some amount of data. Then, we provide communication privacy for both message sender and message recipient using Secure Source Anonymous Message Authentication Scheme. Thereby, the message sender or the sending node generates a source anonymous message authentication for message for releasing each message based on the MES scheme. Hence, our approach will provide message content authenticity without relying on any trusted third parties. © 2016 Springer Science+Business Media New York

Anbarasan R.,National Taiwan University | Dhanalakshmi V.,KCET | Rajasulochana K.,SFR College for women | Jayalakshmi T.,SFR College for women | Anusuya M.,SFR College for women
Journal of Applied Polymer Science | Year: 2010

Calcium diacrylate (CDA) and calcium dimethacrylate (CDM) divinyl monomers were synthesized by a solvo thermal method. The FTIR spectra showed a peak at 1650 cm-1 due to the presence of a C=C for both CDA and CDM. Proton NMR and carbon NMR confirmed the structure of CDA and CDM synthesized by a solvo thermal method. DSC determined the melting temperatures of CDA and CDM. XRD indicated the presence of a d110 plane peak for CDA and CDM. The % weight residue that remained above 700°C in TGA method confirmed the higher thermal stability of CDA. Thus, synthesized CDA and CDM were surface grafted on linear low density poly(ethylene) (LLDPE) at 160°Cunder inert atmosphere by thermolysis method. FTIR confirmed the presence of C=O stretching due to CDA and CDM in LLDPE backbone after thermolysis reaction. 1HNMR confirmed the chemical grafting of CDM onto LLDPE. © 2009 Wiley Periodicals, Inc.

Anbarasan R.,National Taiwan University | Dhanalakshmi V.,KCET
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Year: 2010

The melt graft functionalization of metal di(meth)acrylates onto linear low density poly(ethylene) (LLDPE) at 160 °C under inert atmosphere is reported here. The post melt grafting FTIR-RI method was used to find out the % grafting of metal salts onto LLDPE backbone. Further, DSC, TGA and HRTEM techniques were introduced to explain the results. A plausible reaction mechanism was proposed. © 2010 Elsevier B.V. All rights reserved.

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