Grafted properties

The constant n is a graft property dependent on its structure, but, more important, it was independent of SAN content and molecular weight. Its value was closely related to ABS viscosity and viscoelastic behavior. 

McClure MJ, Simpson DG, Bowlin GL. Tri-layered vascular grafts composed of poly-caprolactone, elastin, collagen, and silk optimization of graft properties. J Mech Behav Biomed Mater 2012 10 48-61. 

With respect to these two grafting properties the order of reactivity in the solvents used was methanol>dioxan >acetone > remaining solvents and this is the order expected if a G(H) relationship were important. The acetone result indicates that, even with some solvents, the radiation chemistry parameter may be more significant in explaining grafting behaviour than either of the two physical models already proposed for the system. ... 

The radiation grafting properties of polypropylene using styrene in methanol as monomer system have been compared with those of the natural materials, cellulose and leather. Of the three, polypropylene is the most reactive trunk polymer (Table 2). Cellulose and leather exhibit comparable styrene grafting properties and all three trunk polymers show acid enhancement in copolymerisation especially in the 20-40% monomer concentration region. The polypropylene and cellulose data illustrate the... 

Experiments witli chemically grafted SAMs displayed much larger wear resistance tlian films produced by tire LB technique [188]. Also it was found tliat wear properties of SAMs can be furtlier improved by chemically grafting CgQ molecules onto SAM surfaces [189]. 

Pathmamanoharan C and Philipse A P 1998 Preparation and properties of monodisperse magnetic cobalt colloids grafted with polyisobutene J. Colloid Interface Sol. 205 304-53... 

Reactive Flame Retardants. Reactive flame retardants become a part of the polymer by either becoming a part of the backbone or by grafting onto the backbone. Choice of reactive flame retardant is more complex than choice of an additive type. The reactive flame retardant can exert an enormous effect on the final properties of the polymer. There are also reactive halogenated compounds used as iatermediates to other flame retardants. Tables 8 and 9 Hst the commercially avaHable reactive flame retardants and iatermediates. 

A review covers the preparation and properties of both MABS and MBS polymers (75). Literature is available on the grafting of methacrylates onto a wide variety of other substrates (76,77). Typical examples include the grafting of methyl methacrylate onto mbbers by a variety of methods chemical (78,79), photochemical (80), radiation (80,81), and mastication (82). Methyl methacrylate has been grafted onto such substrates as cellulose (83), poly(vinyl alcohol) (84), polyester fibers (85), polyethylene (86), poly(styrene) (87), poly(vinyl chloride) (88), and other alkyl methacrylates (89). 

Acrylonitrile—Butadiene—Styrene. ABS is an important commercial polymer, with numerous apphcations. In the late 1950s, ABS was produced by emulsion grafting of styrene-acrylonitrile copolymers onto polybutadiene latex particles. This method continues to be the basis for a considerable volume of ABS manufacture. More recently, ABS has also been produced by continuous mass and mass-suspension processes (237). The various products may be mechanically blended for optimizing properties and cost. Brittle SAN, toughened by SAN-grafted ethylene—propylene and acrylate mbbets, is used in outdoor apphcations. Flame retardancy of ABS is improved by chlorinated PE and other flame-retarding additives (237). 

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