Molecular weight that affect

The effectiveness of the antioxidant depends not only on its reactivity, but also on its molecular weight that affects the rate of the antioxidant loss due to evaporation. The following example illustrates this dependence. Antioxidants of the structure 2,6-bis (1, l-dimethylethyl)phenols with para-substituents of the general structure ROCOCH2CH2 were introduced into decalin and polypropylene films that were oxidized by dioxygen at... 

Organic fouling also affects cation resins, albeit to a lesser degree. The fouling primarily stems from the attachment to the anion exchange site of a variety of low-level organic matter of variable molecular weight that is present in the raw water source. 

Cohen-Stuart et al.58) demonstrated that the molecular weight distribution affects the shape of adsorption isotherms. In fact, often observed round-shaped isotherms are attributed to a broad molecular weight distribution. 

Many effects can be produced by the pores in filler particles. One is that pores in silica reinforce rubber. During mixing, rubber chains migrate into the pores which increase the adhesion between the phases. The selective absorption of low molecular weight components affects the performance of paints and other materials. Microporous membranes and fibers are produced to clean water and selectively absorb certain solutes. 

DHA monomer copolymerizes readily with both 4VP and NVP to form two new reactive polymers. The copolymers are easily obtained in high yield, with polymerization rates and molecular weights strongly affected by initial monomer feeds. Reactivity ratio studies, with r1 = 0.41 and r2 = 0.77 for DHA-CO-4VP and rt = 0.35 and u — 0.15 for DHA-co-NVP, clearly demonstrate that alternating copolymers are obtained. 

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