Tert dodecyl mercaptan

Figure I. Rate of change in macromolecular population dN/ dw as a function of conversion in emulsion copolymerization of styrene and butadiene (styrene butadiene = 29 71 by tot) concentration of tert-dodecyl mercaptan (TDM) modifier in phm A — run 4, 0.10 O — run 6, 0.20 X — run 7, 0.23...

Molecular weight regulator. tert-Dodecyl mercaptan (t-DlBK/), purpled py double distillation in vacuum used in polymerization experiments acc[Pg.64]

Many isomers of dodecyl mercaptan are possible, and a variety of these occur in the technical material known as tert-dodecyl mercaptan, or lauryl mercaptan, or simply dodecyl mercaptan. 

PennvraltdP . [Atochem N. Am.] Tert. dodecyl mercaptan modifier in polymerization reactions, esp. fcM SBR and NBR. 

Graft Polymerization of Styrene (9). Polymerization was effected by the mass-suspension technique under nitrogen. The radical initiator was added to the rubber solution in styrene, with tert-dodecyl mercaptan being added either simultaneously or later during the polymerization. For prepolym-... 

Measurements were made in apparatus depicted in Figure 4. T = 100°C elastomer in the initial styrene solution, 10%. EPDM, type B initiator, tert-butyl peracetate, 0.09% modifier, tert-dodecyl mercaptan, 0.02%. Polybutadiene, lntene initiator, tert -butyl peracetate, 0.02% modifier, tert-... 

The polybutadiene used was Intene from I. S. Rubber [77] = 2.1 dl/g in cyclohexane at 30°C. Vinyl chloride and styrene monomers from Montedison were 99.99 and 99.5% pure respectively. Azobis(isobutyronitrile) (AIBN) from Fluka was 99% pure. Di-te/t-butyl peroxide was 95% pure. Tert-butyl peracetate was used at a 50% dilution with dimethyl phthalate. The n-butyl ester of 3,3- (di-te/t-butylperoxy)valerianic acid was 85% pure. Terf-dodecyl mercaptan, a commercial product of the Societe Nationale des Petroles d Aquitaine, was used as a modifier. The solvents used were commercial products purified by fractionation. 

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