Polyester copolymers

Polyesters are also used in continuous filament spunbonded nonwovens (see Nonwoven fabrics). Reemay spunbonded fabric is composed of continuous filament PET with a polyester copolymer binder. These spunbonded fabrics are available in a wide range of thicknesses and basis weights and can be used for electrical insulation, coated fabric substrates, disposable apparel for clean rooms, hospitals, and geotextiles (qv). 

A number of after-treatments with polyester copolymers carried out after sodium hydroxide processing are reported to produce a more hydrophilic polyester fabric (197). Likewise, the addition of a modified cellulose ether has improved water absorbency (198). Other treatments used on cotton and blends are also effective on 100% polyester fabrics (166—169). In this case, polymeri2ation is used between an agent such as DMDHEU and a polyol to produce a hydrophilic network in the synthetic matrix (166—169). 

Some grades of polyurethane and polyester copolymers are used as hot-melt adhesives. AppHcations include shoe manufacture and as an adhesive interlayer in coextmsion. 

Polyurethane-polyester copolymers, 8 Polyurethane potting compounds, 203 Polyurethane products, depolymerized, 533... 

Polyester copolymers (or copolyesters) are those polyesters synthesized from more than one glycol and/or more than one dibasic acid. The copolyester chain is less regular than the homopolymer chain and therefore has a reduced tendency to crystallize. Such copolyesters are thus predominately amorphous and have high clarity and toughness (see Chapters 6 and 7). 

Starch-based polyester copolymer (Mater-Bi) is marketed of the order of 1.25- 4/kg. 

Last but not least, some of us have recently synthesized polyimide-aliphatic polyester triblock and graft copolymers in collaboration with Hedrick and his coworkers [ 97,98]. Well-defined aminophenyl or diaminophenyl end-functional polyester oligomers have been synthesized on purpose and used as end-cappers or macromonomers leading to the aforementioned triblock or graft copolymers, respectively. The polyimide-polyester copolymers so obtained proved to be highly efficient promoters of polyimide nanofoams (for more details see Sect. 4.2). 

Polycarbonates and polycarbonate polyester copolymers are used for glazing, sealed beam headlights, door seals, popcorn cookers, solar heat collectors, and appliance housings. 

The most widely used graft copolymer is the styrene-unsaturated polyester copolymer (Equation 7.35). This copolymer, which is usually reinforced by fibrous glass, is prepared by the free radical chain polymerization of a styrene solution of unsaturated polyester. 

Asrar, J., Berger, P. A., and Hurlbut, J., Synthesis and characterization of a fire-retardant polyester Copolymers of ethylene terephthalate and 2-carboxyethyl(phenylphosphinic) acid, J. Polym. Sci., Polym. Chem. Edit., 1999, 37, 3119-3128. 

To avoid dissolution or extraction of the FR, FR oligomer can be used instead of monomer. Using this approach, Ma et al.39 reported the synthesis of phosphate-polyester copolymers from spirocyclic pentaerythritol di(phosphate acid monochloride)s. It was shown that LOI of the copolymer increases with increasing phosphate content to reach a maximum of 30 vol %. 

Thermal decomposition of polyester copolymers is of considerable interest because of their common use in practice. A number of reports are available in literature describing either pyrolysis or slow thermal decomposition of polyester copolymers [57-60], etc. Some of these reports are summarized in Table 10.1.10. 

S. F. Rubber-Polyester Composites Including Polystyrene-Polyester Copolymers. U.S. Patent 5,597,651, Jan 28, 1997 Hoechst Celanese. 

A number of commercially significant PC copolymers are produced. In addition to the previously discussed branched PCs (for extrusion and blow-molding applications) and copolymers of BPA with tetrabromo-BPA for enhanced flame retardancy, high-Tg polyester carbonate copolymers have been produced for a number of years (Bayer Apec , GE LEXAN PPC Tg approximately 190°C). Polyester carbonate copolymers can be produced via copolymerization of BPA with diacyl chlorides. Aromatic diadds produce high-Tg copolymers, while aliphatic diadds yield lower-Tg copolymers. A lower-Tg PC aliphatic polyester copolymer (GE LEXAN SP resin) exhibits enhanced flow and ductility in comparison to standard PC and is useful for thin-wall injection molding applications requiring ductility and ease of melt processability, such as personal communication devices. GE has recently introduced two new PC copolymers, a PC-siloxane copolymer (LEXAN EXL) and a copolymer of... 

Figure 16. Weight distribution of hard-segment sequences in polyester copolymers 40% 4GT/PTMEG-T (A), 40% 4GT/10% 4G-P/PTMEG-...

Table 2 lists eleven polyester copolymer systems in which the compositional relationship to the presence of anisotropy has been established by the authors of... 

The hydroxylated polyesters react with special silicone intermediates to give silicone-polyester copolymers for baked finishes that provide high heat resistance and outstanding exterior durability (14). These resins are extensively used in coil coatings for steel and aluminum building panels where high durability is required (Figure 6). 

Casoron. [Uniroyal] Hebicide. Cassapret SRH. [HoechstAG] Polyester copolymer hydrophilizing agent Cassastat [Hoechst AG] Quaternary... 

Fig. 11.6 SEM images of submicron poly(vinylidene fluoride) (PVF2) particles on a polished silicon substrate (silicon wafer, left) and a polyester copolymer (right).

Fig. 11.6 SEM images of submicron poly(vinylidene fluoride) (PVF,) particles on a polished silicon substrate (silicon wafer, left) and a polyester copolymer (right). The (van-der-Waals) attraction force between the particles and the substrates is so great that particles embed into the soft polymeric material (right) but not into the silicon (left), although in the latter case they are flattened at the contact points [B.39, Vol. 2, p. 51]...

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