Network Formation by Free Radical Polymerization in Isothermal Continuous Flow Stirred Reactors. Issue 3 (13th December 2016)

• Record Type: Journal Article
• Authors: Nieves‐Remacha, Maria Jose; Villa, Carlos; Arriola, Dan
• Is Part Of: Macromolecular reaction engineering. Volume 11:Issue 3(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2016-12-13
• Subjects: chain coupling -- free radical polymerization -- method of moments; Polymers -- Periodicals; Polymerization -- Periodicals; Reaction mechanisms (Chemistry) -- Periodicals; Electronic journals; 547.705
• DOI: 10.1002/mren.201600028
• Languages: English
• ISSNs: 1862-832X

Abstract

Abstract : Network formation in the presence of a limited amount of material that supplies the necessary coupling groups along the chain has been studied. This provides bounds on the level of coupling agent to use, its degree of incorporation into chains, and subsequent use in network formation. Abstract : The authors apply the method of moments to the study of network formation in continuous flow stirred reactors when chain transfer to polymer and coupling are present in the reaction scheme. This approach leads to analytical solutions for the various moments involved. The authors start by assuming that the rate of coupling is proportional to the length of dead chains, which allow them to review and extend previous work in this area. This is followed by similar derivations when a coupling agent is present and the rate of coupling is proportional to the number of coupling groups that such agent leaves in dead polymer molecules, demonstrating that higher values of second order moments can be reached at lower levels of unreacted coupling agent.