7Ambler M R, Mate R D, Purdon J R. A basis for the determination of branching in polymers by use of gel-permeation chromatography[J]. J Polymer Sci: Polymer Chemistry Edition, 1974, 12 ( 8 ):1759
8Ambler M R,Mate R D,Purdon J R. Experimental branching results for diene polymers by use of gel-permeation chromatography[J] . J Polymer Sci: Polymer Chemistry Edition, 1974, 12 ( 8 ):1771