Plastic materials properties

Birley, A.W. and Scott, M.J. Plastic Materials Properties and Applications, Leonard Hall, Glasgow (1982)... 

Handbook of Plastics Materials and Technology , Irvin I. Rubin John Wiley Sons (1990) ISBN 0471096342. Essential information from acetal to XT polymer. This single source comprises 119 chapters of in-depth basic information about plastic materials, properties, processing, assembly, decorating and industry practices-all presented in a readily accessible and consistent format. Also features a wealth of useful auxiliary information and tables. 

The plastics material properties information and data presented in this chapter provide comparative guides. As reviewed in Chapter 1 plastics can be modified to meet all kinds of properties, performances, and processes by compounding, alloying, etc. Figure 2.6 provides a simplified summary in a pie section representing the properties of plastics. Literally each of the plastics can be modified to almost exist in any position within the pie section. 

As can be seen by this equation when /t = 1 the post yield curve is a straight line with a slope that is a function of the elastic and plastic material properties. For n > 1 the slope is a function of a i.e., not a straight line. 

Birley, A.W., Heath, R.J., Soctt, MJ. (1988) Plastics Materials Properties and Applications, Chapman and Hall, 2nd Edition. 

Analyses have been carried out assuming a cavitated particle, that is, the particle is replaced by a void (see the section Cavitation of the Rubber Particles ). The analysis is applied to an annulus of epoxy resin. The volume fraction of the void is 20%. The elastic material properties used for the epoxy matrix are shown in Table I. The elastic-plastic material properties used are shown in Figure 4. Nonlinear geometric effects were included to take account of large deformations. Final failure of the cell was defined (23) to be the applied strain required for the maximum linear tensile strain in the resin to attain the value of 20%. 

As a rule, technical plastics contain atactic, isotactic, and syndiotactic moieties. The ratio of these moieties to one another is decisive in terms of the plastic material properties. In polypropylene, for example, the atactic moiety is only 2-5 %. This means the degree of crystallization is potentially very high in polypropylene. The more regular the arrangement of the substituents, the greater the probability that crystalline structures can form. 

D. Rackowitz, Looking Beyond the Material Datasheet Understanding Plastic Material Properties, SAE Tech. Paper 1999-01-275, Society of Automotive Engineers International Congress and Exposition, Detroit, Michigan, March l-A, 1999. 

In general, these analysis tools fall under the domain of computer-aided engineering (CAE). The key word there is aided. Analysis tools in no way replace skill or education in the basics of plastic material properties, mold design, or processing. What analyses do is supplement the knowledge of trained individuals, making them more productive and more accurate in their predictions. 

PLASPEC (Plaspec [PT], New York, NY). Complete, accurate up-to-date initial material selection available from all supplies through one source. Over 600 searchable characteristics listed, including special features of plastic materials, property data, cost. 

The plastics material properties information and data presented are provided as comparative guides readers can obtain the latest and more detailed information from suppliers and/or software programs (Chapter 5). Since new developments in plastic materials are always on the horizon it is important to keep up to date. It is important to ensure that the fabricating process to be used to produce a product provides the properties desired. Much of the market success or failure of a plastic product can be attributed to the initial choices of material, process, and cost. 

Christopher, C. I. Thermo Plastic Materials-Properties, Manufacturing Methods and Applications. CRC Press, pp. 491 2Q ). 

In efforts to comingle materials, however, additives or varying resin balances in the mix result in poorly compatibilized resins. As discussed in the previous sections of this chapter, if paints, laminates, alloys, or functional additives in the plastic material are not compatible, then blooming, cohesive debonding, or degradation of the recylced plastic material properties are evidenced. Table 7 lists the compatibility of several thermoplastic resins. If plastics are deemed noncompatible or of limited compatibility, compatibUizing resins or additives may be added to the mix to achieve suitable properties (52). Table 7 lists the compatibility differences between several thermoplastics. 

Birley, A. W., and M. J. Scott Plastics Materials Properties and Applications, 2nd edn.. Chapman Hall, New York, 1988. 

Plastics Materials - Properties and applications 2nd Edition, A W Birley, R J Heath, M J Scott T Avery... 

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