Abstract
An equation has been derived giving the number-average amount of branchings per macromolecule for slightly branched polyurethanes in relation to degrees of conversion of functional groups. Experimental findings are taken as a basis for calculating kinetic parameters of propagation and branching reactions taking place in the system polyethylenebutyleneglycol adipate-2,4-toluylene diisocyanate, and theoretical temperature conditions have been calculated for the synthesis of the slightly branched prepolymer formed in the first stage of formation of network polyurethane. Two network polyurethanes were synthesized: the first under a regime approximating to theory, and the second under isothermal conditions. It is shown that the degree of branching of the prepolymer can have a marked influence on several properties of the polyurethanes.
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.
