Branched polymers were prepared from the bifunctional 4,4'-diglycidyloxy-2,2odiphenylpropane( diglycidyl ether of bisphenol A) and hexafunctional poly(oxypropylene) diamine (Jeffamine T-403) at different distances from the gel point in the absence and presence of a diluent. Polymers with different amounts ofintramolecular cycles were prepared by dilution during polymerization of the epoxide system with diglyme/butanol mixed solvent. The static and dynamic light scattering from dilute solutions of these epoxide samples was measured. The results are discussed in terms of existing gelation theories. The critical exponents of M, lie between the values predicted by the Flory-Stockmayer and percolation theories and are shifted towards the percolation value with increasing fraction of intramolecular cycles. Polymer growth near the gelation threshold is discussed
Посилання на статтю:
Size and mass of branched epoxy resins / K. Grof*, L. Mrkvickova, C. Konak and K. Dusek // Polymer. – 1993. – Vol 34. – P. 2816-2820.