Resins, plastic, definition thermoplastics

Vinyl chloride homopolymer Vinyl chloride polymer Vinyl chloride resin Vinyon Definition Synthetic thermoplastic high polymer in rigid, plasticized, std. and high impact grades resist, to weathering, moisture, most acids, fats, petrol, hydrocarbons, fungus dimensionally stable good dielec, props. 

Plastics are subidivided into two types thermoplastic and thermosetting. The thermoplastics can be softened by heat and hardened again by subsequent cooling. This process is reversible and can be repeated many times. By contrast, the thermosetting resins are first softened and melted and, at subsequent heating to a definite temperature, they are irreversibly hardened, becoming insoluble [53]. 

Commercial Plastisols, Accdg to definition given in Ref 2, a plastisol is a liquid dispersion of finely divided resin in a plasticizer. It is usually 100% solid with no volatiles when volatile content exceeds 5% of the total wt it is called organosol. When the plastisol is heated, the plasticizer solvates the resin particles, and the mass gels. With continued application of heat the mass fuses to become a conventional thermoplastic material... 

Alkyd resins have been the workhorse for the coatings industry over the last half century. The term alkyd was coined to define the reaction product of polyhydric alcohols and polybasic acids, in other words, polyesters. However, its definition has been narrowed to include only those polyesters containing monobasic acids, usually long-chain fatty acids. Thus thermoplastic polyesters typified by polyethylene terephthalate (PET) used in synthetic fibers, films, and plastics and unsaturated polyesters typified by the condensation product of glycols and unsaturated dibasic acids (which are widely used in conjunction with vinylic monomers in making sheet molding compounds or other thermosetting molded plastics) are not considered as part of the alkyd family and are beyond the scope of the present discussion. 

Definition Ester of erucyl alcohol and stearic acid Uses Lubricant, slip agent, antiblocking agent, and mold release agent for plastics, crayons, petrol, prods., asphalts, inks, metals, textiles mold release agent for thermoplastic resins in inj. molding defoamerand water repellent in industrial/household applic. 

It is difficult to agree on a precise definition of a high performance plastic. There is indeed a clear overlap across the entire classification spectrum of thermoplastic materials. Some commodity plastics can be modified through reinforcements to compete with traditional engineering resins. Glass fibre-reinforced polypropylene is a good example of a standard thermoplastic material that is challenging polyamide and ABS in many different fields of application. 

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