Thermoplastic assets

Values are approximate because composition of materials differs considerably depending on method of production Sources "Polymer PropertiesPolymer Products from Aldrich, online at http //www.sigmaaldrich.com/img/assets/3900/Thermal Transitions of Homopolymers.pdf and "Thermoplastics—An Introduction,"abstracted from the Materials Information Service, edited by Justin Furness, online at http //216.239.41.104/search q=cache BI7epgbl1 pgJ www.azom.com/details. asp ArticlelD=83+tg+table+ glass+transition +temperature" hl=en ie=UTF-8 ... 

Injection molding is capable of accommodating the broadest range of materials. Nearly all the thermoplastics can be injection molded and, with special equipment, even many thermoset materials can be used. The mold capabilities of the process are also a major asset. Moldmakers have succeeded in constructing incredibly complex molds using side actions to create holes perpendicular to the parting line, split cavities for imusual shapes, and cores which collapse to permit withdrawal from undercuts. 

An important route to modify performance of polymers is making copolymers of an existing thermoplastic. This can be important if existing assets can be used to manufacture the copolymer. Copolymers of amorphous resins are increasing in popularity. PC,... 

Martin P P C G, Van Duin M, Van Gurp M (2003) Process for making thermoplastic composition comprising d5mamic crosslinking, PGT Int Appl WO 2003 099 927, to DSM Ip Assets B V Neth. 

Polylactide (PLA) and thermoplastic starch-(TPS) are two of the most promising biobased materials currently available on the market. The expected rise in the cost of petroleum-based commodities in the next decades opens bright perspective for these materials. Their biodegradability and compostability is also seen as an asset in applications that are difficult to recycle. 

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