Polyphthalamides PPA

Property Nylon-4,6 Nylon-MXD.6 Nylon-NDT/INDT Polyphthalamide (PPA)... [Pg.267]

While additive analysis of polyamides is usually carried out by dissolution in HFIP and hydrolysis in 6N HC1, polyphthalamides (PPAs) are quite insoluble in many solvents and very resistant to hydrolysis. The highly thermally stable PPAs can be adequately hydrolysed by means of high pressure microwave acid digestion (at 140-180 °C) in 10 mL Teflon vessels. This procedure allows simultaneous analysis of polymer composition and additives [643]. Also the polymer, oligomer and additive composition of polycarbonates can be examined after hydrolysis. However, it is necessary to optimise the reaction conditions in order to avoid degradation of bisphenol A. In the procedures for the analysis of dialkyltin stabilisers in PVC, described by Udris [644], in some instances the methods can be put on a quantitative basis, e.g. the GC determination of alcohols produced by hydrolysis of ester groups. [Pg.154]

Polyphthalamides (PPA), 10 216-217 ASTM standards for, 19 793 Poly(p-phenylene) (PPP), 22 207t 23 717 conducting, 7 523, 527 molecular structure of, 22 211 optical band gap, 7 529t room temperature conductivity, 7 532 water-soluble, electroactive, self-doped sulfonatoalkoxy-substituted, 23 720 Poly(p-phenylene benzobisoxazole) (PBO), 19 714... [Pg.741]

Semi-aromatic PAs are copolymers of an aromatic diacid and a linear diamine or a linear diacid and an aromatic diamine. Polyphthalamide (PPA) and polyarylamide (PAA) are semi-aromatic, semi-crystalline PAs. Some amorphous semi-aromatic PAs are transparent. [Pg.374]

Semi-aromatic polyamides, polyphthalamide (PPA), polyarylamide (PAA), transparent amorphous polyamide (PA-T)... [Pg.406]

Semi-crystalline, such as polyphthalamide (PPA) and polyarylamide (PAA), generally having a weak and slow absorption of water, a high rigidity, and better resistance to weathering and oils. For example, the properties of polyphthalamides are claimed to be intermediate between those of PA 66 and polyphenylene sulfide (PPS). [Pg.406]

Typical polyesters characterized by GPC include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polycylohexylenedimethyl-ene terephthalate (PCT). Polyphthalamides (PPA) and polyamides are also commonly analyzed. [Pg.1225]

PPS with polyphthalamide (PPA) heat and chemical resistance, HDT, mechanical properties Chen and Sinclair, 1990... [Pg.69]

Thermo-oxidation of polyphthalamides (PPA-1 and PPA-2) display the same regularities (kinetics of mass losses, oxygen absorption and release of the main volatile products, composition of volatile and heavy products relative to the polymer structure, oxidation inhibiting by adding PCA and transition metal compounds, etc.), which are described in detail for PAI, PPQ, polybenzoxazole (PBO), PEI, PI, PAIM, polyphenyl sulfide (PSP), PES and LCP. The degradation mechanism will now be discussed in more detail using PPA-1 and PPA-2 as examples (see Figure 7.5 and 7.6). [Pg.199]

Structure of polyphthalamides PPA-1 and PPA-2 represents alternation of aliphatic and aromatic sequences. [Pg.200]

ASTM D5336-03. Standard specification for polyphthalamide (PPA) injection molding materials. West Conshohocken, PA ASTM... [Pg.296]

There are a number of other specialty polyamides produced from a combination of other diamines and dicarboxylic acids and/or lactams of varying number of carbon atoms. PA-11 and PA-12 with 11 and 12 methylene units between each repeat amide group are relatively low-melting point (170 °C), but exhibit excellent ductility and moisture resistance. Among the more recent class of polyamides are the high-melting (ca. 300 °C) PA-4,6 and PA-6T copolymers with 6 or 66 or 6T monomer units, known as polyphthalamide (PPA) nylons. [Pg.1800]

Amodel AD- Polyphthalamide, PPA, semicrystalline-PA Amoco Performance Products... [Pg.2284]

Polyphthalamide (PPA) n. Poly( 1,2-benzene-dicarboxamide). A polyamide in which the residues of terephthalic or iosphthalic (or mixed) acid components are part of the mer unit of the chain. PPA is an advanced engineering polymer first commercially offered in 1991 by Amoco Chemical Co. (MS, USA) under the trade name Amodel . [Pg.763]

ASTM D5336-93, Standard Specification for Polyphthalamide (PPA) Injection-Molding Materials, ASTM, Philadelphia, Pa., 1993. [Pg.5926]

Some of the polyphthalamide (PPA)/high-perfor-mance polyamide characteristics are as follows ... [Pg.224]

Table 3.1 shows continuous use temperatures for engineering and high performance polymers. For comparative purposes, 30% glass fibre-reinforced grades have been selected. PEEK has the highest continuous use temperature of up to 260 C, followed closely by liquid crystal polymers. Other high performance polymers are polyphthalamide (PPA), polyamideimide (PAI), polyarylimide, polyphenylene sulfone (PPSU), polyphenylene sulfide (PPS), polyetherimide (PEI), polysulfone (PSU), polyethersulfone (PES). [Pg.9]

Polyphthalamide (PPA) is a semi-crystalline engineering polymer that bridges the cost-performance gap between traditional engineering thermoplastics such as polycarbonate (PC), polyamides (PA polyester (PET, PBT), acetals (POM) and higher-cost speciality pol5nners such as liquid crystal polymers (LCP), polyphenylene sulfide (PPS) and polyetherimide (PEI). [Pg.30]

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