Immiscibility of Silicone Rubber and Polymethylmethacrylate

Vijayalakshmi, N. S.; Reddy, Mohan M.; Naidu, S. Venkata; Ramanjappa, T.; Appalanaidu, P.

doi:10.1080/00914030801891302

Cited by 3 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Optical clarity is the main feature of this plastic. In many applications, it is an excellent substitute for glass; it has good mechanical properties as well …”

Section: Resultsmentioning

confidence: 75%

“…In many applications, it is an excellent substitute for glass; it has good mechanical properties as well. 63 As already known experimentally and demonstrated computationally, the syndiotactic polymer is preferred over the isotactic one. 34 A conformational analysis has been carried out for the syndiotactic propagating radical chain (Figure 5).…”

Section: Modeling the Chain Transfer Process In The Free Radical Poly...mentioning

confidence: 81%

See 1 more Smart Citation

Role of Chain Transfer Agents in Free Radical Polymerization Kinetics

et al. 2010

View full text Add to dashboard Cite

This study deals with modeling the propagation and the chain transfer reactions in the free radical polymerization of ethylene, methyl methacrylate (MMA), and acrylamide (AM). The chain transfer agents modeled in the free radical polymerization of ethylene are the experimentally widely used species such as ethylene, methane, ethane, propane, trimethylamine, dimethylamine, chloroform, and carbon tetrachloride. The role of 4-X-thiophenols as chain transfer agents in the polymerization of MMA and AM has been investigated. Geometry optimizations have been carried out with the B3LYP/6-31+G(d) methodology. Reaction rate constants are calculated via the standard transition-state theory with the B3LYP/6-311+G(3df,2p)//B3LYP/6-31+G(d), MPWB1K/6-311+G(3df,2p)//B3LYP/6-31+G(d), and M05-2X/6-311+G(3df,2p)//B3LYP/6-31+G(d) methodologies, which reproduce qualitatively the experimental trends for the chain transfer rate constants. The usage of simple continuum models with the MPWB1K/6-311+G(3df,2p)//B3LYP/6-31+G(d) methodology for the solvation energies has slightly improved the accurate prediction of the chain transfer constants. Polar interactions highly influence the barrier heights for chain transfer reactions in the FRP of ethylene, MMA, and AM. Calculated chain transfer rate constants in the FRP of MMA and AM correlate quite well with the Hammett constants.

show abstract

“…Optical clarity is the main feature of this plastic. In many applications, it is an excellent substitute for glass; it has good mechanical properties as well …”

Section: Resultsmentioning

confidence: 75%

Section: Modeling the Chain Transfer Process In The Free Radical Poly...mentioning

confidence: 81%