Abstract
Gelation in reactions of Niax triols with hexamethylene and decamethylene di-isocyanates has been studied. The gel points occur at extents of reaction in excess of those predicted by Flory-Stockmayer theory. The excess, intramolecular reaction increases with dilution and with decreases in the molecular weights of the reactants. Kilb's theory of gelation does not explain the results, but a semi-quantitative explanation is found in terms of a combination of Frisch's and Kilb's theories. In this, λ, the intramolecular branching parameter of Frisch, is given by the equation λ = const.v − 3 2 ( OH 0 + NCO 0) −1 , with v the number of bonds in the smallest ring which can form.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
