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Processing peroxide olefinic unsaturation

Figure 2. Development of peroxide and olefinic unsaturation with time during the processing of PVC... Figure 2. Development of peroxide and olefinic unsaturation with time during the processing of PVC...
A chain branching process can result from addition reactions of an alkyl peroxy radical to olefins or acetylenes, where vinyl, or acetyl peroxides are formed. The initial radical formed by the addition of the peroxy radical would undergo an addition reaction with molecular oxygen, then undergo molecular elimination of HO2 to form an unsaturated peroxide. The unsaturated peroxide would then undergo rapid cleavage of the weak peroxide bonds. A mechanism that implements this chain branching results from ROO addition to olefins is illustrated by ... [Pg.57]

Fig. 3.37. Effect of processing time on the formation of olefinic unsaturation and peroxides in poly(vinyl chloride) at different temperatures (O, ) peroxides and ( , ) unsaturation. (Reprinted from Scott, G., Polym, Plast. Technol. Eng., 11, 1 by courtesy of Marcel Dekker Inc, NY, 1978.)... Fig. 3.37. Effect of processing time on the formation of olefinic unsaturation and peroxides in poly(vinyl chloride) at different temperatures (O, ) peroxides and ( , ) unsaturation. (Reprinted from Scott, G., Polym, Plast. Technol. Eng., 11, 1 by courtesy of Marcel Dekker Inc, NY, 1978.)...
See other pages where Processing peroxide olefinic unsaturation is mentioned: [Pg.204]    [Pg.28]    [Pg.481]    [Pg.236]    [Pg.90]    [Pg.97]    [Pg.662]    [Pg.245]    [Pg.236]    [Pg.91]    [Pg.172]    [Pg.49]    [Pg.903]    [Pg.26]   


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