Plastics family

An extensive new Section 10 is devoted to polymers, rubbers, fats, oils, and waxes. A discussion of polymers and rubbers is followed by the formulas and key properties of plastic materials. Eor each member and type of the plastic families there is a tabulation of their physical, electrical, mechanical, and thermal properties and characteristics. A similar treatment is accorded the various types of rubber materials. Chemical resistance and gas permeability constants are also given for rubbers and plastics. The section concludes with various constants of fats, oils, and waxes. 

Polystyrene [9003-53-6] (PS), the parent of the styrene plastics family, is a high molecular weight linear polymer which, for commercial uses, consists of - 1000 styrene units. Its chemical formula (1), where n = - 1000, tells htde of its properties. 

During the next four years many additional new polymers were synthesized. Most proved of little commercial value, but the list includes three of the top-ranked popular plastic families - the polyvinyls used for phonograph records and floor tiles polyacrylics (such as Lucite) used in paints, airplane windows and buna N and buna S, two versions of synthetic rubber. Thus few households are not affected by even his early contributions. 

The distribution between the families varies from one area to another mainly for polyethylene, thermoplastic polyesters and amino resins. For these, the variation perhaps comes from a problem of identification in the statistics, as some may include significant applications that are outside the framework of this book. However, we can say that the five most used plastic families are thermoplastics. 

Unit Share of the plastic family in the film market Share of film applications in the total for the plastic family... 

Upgrading towards use of a more-sophisticated plastic family use of more thermostable plastics that can withstand on-line electrostatic coating (e-coating). 

Downgrading to a cheaper plastic family with sufficient performance to satisfy the requirements, possibly thanks to design adaptation. 

The following are various plastic families and their respective specific plastics that are included in the Chemical Resistance Chart. The boldfaced uppercase letters correspond to the plastics in the chart. These acronyms are generally accepted, but are not universal. 

Examples of major plastic families Thermoplastic thermal properties are compared to aluminum and steel General properties of thermoplastic General properties of thermoset plastic General properties of reinforced thermoplastic General properties of reinforced thermoset plastic Examples of drying different plastics (courtesy of Spirex Corp.)... 

Perhaps the best known member of the "heat-resistant" styrene plastics family is General Electric s Noryl (34). Noryl is an alloy of poly(phenylene oxide) and high-impact polystyrene. Heat deflection temperatures for Noryl range as high as 300 °F. The balance of mechanical properties is excellent, although processability is more difficult than for conventional styrene plastics. 

Standard Symbol Plastic Family Name ASTM Standard Unfilled Filled... 

General Description Amitel is DSM Engineering Plastics family of copolyesters (COPEs) and thermoplastic elastomers (TPEs). These resins are multiblock copolymers in which butylene terapthalate hard segments andpoly(alkylene oxide) soft segments alternate repeatedly along the polymer backboned 1... 

Many plastic families have their own ASTM and ISO guidelines for testing. These guidelines provide standard testing procedures including sample preparation and often define die subclassification of the plastic products. Some of these standards are given in Table 1.8. 

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