Padmavathy Rajagopalan’s research while affiliated with Indian Institute of Technology Kharagpur and other places

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Publications (1)


Selective hydrogenation of olefinic bonds in styrene‐isoprene‐styrene triblock copolymer by palladium acetate catalyst
  • Article

September 1993

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19 Reads

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15 Citations

Susmita Bhattacharjee

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Padmavathy Rajagopalan

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Bhola Nath Avasthi

Homogeneous catalytic hydrogenation of styrene-isoprene-styrene triblock copolymer (SIS) has been carried out selectively at the carbon-carbon double bond in the presence of palladium acetate catalyst under mild conditions. Degree of hydrogenation has been calculated with the help of infrared and nuclear magnetic resonance spectroscopic techniques. Almost 90 mol % complete hydrogenation has been achieved at 60°C under 1.4 MPa hydrogen pressure, 40 mg catalyst (for 2 g of polymer) in chloroform-acetone solution for 1 h. © 1993 John Wiley & Sons, Inc.

Citations (1)


... It is also known that anionic polymerization gives copolymers with well-controlled monomer distribution and microstructure, a narrow molecular weight distribution, and the possibility to have end group functionality (Escobar et al., 2000). Hydrogenation of styrene-diene copolymers has received special interest (Bhattacharjee et al., 1993) since the double bond present in the diene segment of the elastomer is susceptible to thermal and oxidative degradation . Hydrogenation of styrenediene block copolymers allows the production of thermo-oxidative resistant thermoplastics, and selective saturation of diene units (over the rigid units of styrene) permits to control mechanical and thermal properties. ...

Reference:

Applications of carbon nanotubes in environmental issues: Controlling water pollution
Selective hydrogenation of olefinic bonds in styrene‐isoprene‐styrene triblock copolymer by palladium acetate catalyst
  • Citing Article
  • September 1993