Engineering plastics polyamide

Acrylic ESTER POLYMERS Acrylonitrile POLYMERS Cellulose esters). Engineering plastics (qv) such as acetal resins (qv), polyamides (qv), polycarbonate (qv), polyesters (qv), and poly(phenylene sulfide), and advanced materials such as Hquid crystal polymers, polysulfone, and polyetheretherketone are used in high performance appHcations they are processed at higher temperatures than their commodity counterparts (see Polymers containing sulfur). 

Polyamides can claim to have been the first engineering plastics as a result of their excellent combination of mechanical and thermal properties. Despite being iatroduced as long ago as the 1930s, these materials have retained their vitaUty and new appHcations, and iadeed new types of nylon continue to be developed. 

Polyamides (nylon). There are several different types of nylon (e.g. nylon 6, nylon 66, nylon 11) but as a family their characteristics of strength, stiffness and toughness have earned them a reputation as engineering plastics. Table 1.3 compares the relative merits of light metal alloys and nylon. 

The Shodex GPC HFIP series is packed with a hexafluoroisopropanol (HFIP) solvent. Engineered plastics, such as polyamides (nylon) and polyethylene terephthalate, were analyzed previously at a high temperature of about 140°C. Using FIFIP as an eluent, such engineered plastics can be analyzed at ordinary temperatures (Table 6.4). 

Figures 6.18—6.20 show the chromatograms of engineered plastics such as polyamide (nylon) and polyethylene terephthalate at ordinary temperature.

This class of polyesters consists of four major commercial polymers and their copolymers, namely PET, PTT, PBT, and PEN (see Table 2.1). They compete for engineering thermoplastics, films, and fibers markets with other semicrystalline polymers, such as aliphatic polyamides, and for some other applications with amorphous engineering plastics such as polycarbonate. The syntheses of PET and PBT, detailed in numerous reviews and books,2-5 are described in Sections 23.2.2 and 2.3.2.1. 

Engineering critical current, 23 823 Engineering gold, 9 812 Engineering materials, fatigue properties database on, 13 494 Engineering plastics, 19 537-538 pigments used in, 19 407 polyamides, 19 772 polymers as, 20 401... 

Polyamide-imide is an engineering plastic used only for specialized and technical applications. 

As indicated in Table I, most properties of polyamide derivatives of BA, nylons 13, and 13/13, are predictable from properties of commercial engineering plastics such as nylon-11 and nylon-6/10 -- the BA based nylons are have lower moduli and most physical properties are unexceptional.[9,10] However, the BA based nylons have one exceptional property -- their very low capacity to absorb moisture. This property suggests that these materials may be less affected by water plasticization than other nylons, and it has attracted interest in developing BA-based nylons commercially. Development has been impeded by the fact that BA is not produced on a sufficient scale to make it cost-competitive, and apparently the attractive markets are not large enough to justify investment in development of BA processes, creating a chicken-or-egg" problem. 

Grilamid - ENGINEERING PLASTICS] (Vol 9) - [POLYAMIDES-PLASTICS] (Vol 19) - ELASTOMERS SYNTHETIC - THERMOPLASTIC ELASTOMERS] (Vol 9) - ELASTOMERS SYNTHETIC - THERMOPLASTICELASTOMERS] (Vol 9)... 

Boric oxide is reported to be an effective fire retardant in engineering plastics such as polyphenylene ether (PPE)/high impact polystyrene (HIPS), polyetherketone, and polyetherimide.34-35 It is particularly effective when used in conjunction with PTFE or polyvinylidene fluoride. The use of boric oxide in conjunction with red phosphorus was reported to be an effective combination in fiberglass reinforced polyamide 6,6.36... 

---