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Effect of Organic-Inorganic Hybrid POSS on Swelling Behaviour and Rheological Properties of Hydrogels

Nandi, Mridula (2015) Effect of Organic-Inorganic Hybrid POSS on Swelling Behaviour and Rheological Properties of Hydrogels. Masters thesis, Indian Institute of Science Education and Research Kolkata.

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    Abstract

    In this study we have synthesized poly(ethylene glycol) methyl ether methacrylate (PEGMA) based hydrogels via both conventional free radical polymerisation (FRP) and controlled radical polymerisation (CRP). Hydrogel synthesis via RAFT using di(ethylene glycol)dimethacrylate (DEGDMA) as di-functional cross-linker has been performed using two different chain transfer agents (CTA), 4-cyano-4-(dodecylsulfanylthiocarbonyl) sulfanylpentanoic acid (CDP) and POSS chain-ended CTA (POSS-CDP) in presence of AIBN (AIBN acts as radical source) for various [monomer]/[cross-linker] ratio. To understand the effect of POSS as well as cross-linking density on morphology and mechanical strength of the hydrogels, various studies have been conducted which includes swelling and deswelling kinetics measurement at different temperatures, thermogravimetric analysis and rheological tests. The interior morphology of hydrogel matrix has been examined by field emission-scanning electron microscopy (FE-SEM).

    Item Type: Thesis (Masters)
    Additional Information: Supervisor: Dr. Priyadarsi De
    Uncontrolled Keywords: Hydrogels; Organic-Inorganic Hybrid POSS; RAFT; Reversible Addition-Fragmentation Chain Transfer; Rheological Properties; Swelling Behaviour
    Subjects: Q Science > QD Chemistry
    Divisions: Department of Chemical Sciences
    Depositing User: IISER Kolkata Librarian
    Date Deposited: 21 Jun 2016 09:42
    Last Modified: 21 Jun 2016 09:43
    URI: http://eprints.iiserkol.ac.in/id/eprint/324

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