of the antioxidant polymer was determined by the freezing technique known as beckman 39 s method and set forth in glasstone textbook of physical chemistry 2 md 1947 646 47 molecular weight measurements in this experiment were made on 5 solutions in benzene the resulting polymeric antioxidant was incorporated into polyethylene and the dta exotherm temperature was determined table iii__________________________________________________________________________ dta exothermthiobisphenol concentration temperature time yield molecular temperature u00b0 cexamplekg gms 100 mls u00b0 c hrs weight unaged argon aged__________________________________________________________________________23 0 108 14 5 155 160 2 105 876 287 5 283 224 4 0 16 2 160 6 101 880 287 9 286 825 15 0 35 8 160 167 3 101 1 287 283 5 285 126 0 324 43 9 160 163 31 2 102 640 284 5 284 1__________________________________________________________________________ these examples illustrate the effect of ph on the polymer properties obtained using a ferricyanide to prepare the antioxidants in examples 27 31 the ferricyanide was dissolved in 80 of the water used and added dropwise over 3 hours to a mixture of 4 4 39 thiobis 6 t butyl m cresol benzene an acid acceptor and the remaining water molecular weights of the product were determined according to the method of example 23 table iv__________________________________________________________________________thiobisphenol k sub 3 fe cn sub 6 water benzene molecularexampleg g type ph g mls mls weight appearance__________________________________________________________________________27 100 90 nach 7 11 20 300 200 663 light green28 120 146 nach 7 11 30 400 200 860 green brown29 120 146 na sub 2 co sub 3 8 10 60 500 200 800 deep yellow30 120 146 nahco sub 3 6 8 42 500 200 900 light yellow31 120 146 nahco sub 3 6 8 42 500 200 944 very light__________________________________________________________________________ yellow the thiobisphenol used in this.