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PETG

Polyester sheet products may be produced from amorphous poly(ethylene terephalate) (PET) or partiaHy crystallized PET. Acid-modified (PETA) and glycol modified (PETG) resins are used to make ultraclear sheet for packaging. Poly(butylene terephthalate) (PBT) has also been used in sheet form. Liquid-crystal polyester resins are recent entries into the market for specialty sheet. They exhibit great strength, dimensional stabHity, and inertness at temperatures above 250°C (see Polyesters,thermoplastic). [Pg.377]

The copolyester was first marketed as Tenite Polyterephthalate 7DRO but is now sold as Kodar PETG. [Pg.729]

Table 25.9 Typical properties of the copolyester Kodai PETG... Table 25.9 Typical properties of the copolyester Kodai PETG...
A similar product is Kodar PETG 6703 in which one acid (terephthalic acid) is reacted with a mixture of glycols (ethylene glycol and 1,4-cyclohexylene glycol). A related glass-reinforced grade (Ektar PCTG) has also been offered. [Pg.730]

Interlacing then takes place, a precise digital merging by computer of the angles into a master image. When printed on a lenticular sheet such as Eastman Chemical s Spec-tar PETG, the grooves of the sheet force the... [Pg.232]

NPRC National Polystyrene Recycling PETG polyethylene terephthalate... [Pg.653]

Physicochemical tests—plastics Polyethelene containers PET and PETG bottles... [Pg.604]

Hexane at 50° Hexane at 50° ETOH (PETG) w-heptane 49° for 10 days... [Pg.604]

Multiple internal reflectance No test Same as USP std.LDPE or HDPE Same as USP std. of PET or PETG... [Pg.604]

Thermal analysis No test Same as USP stds. endotherm and exotherm units — 6° (HDPE), and 8° (LDPE) Same as USP stds. endo and exo limits—9((PET), none for PETG, glass transition within 4° (PET), 6° (PETG)... [Pg.604]

In theory, almost any comonomer diacid or dialcohol could lead to amorphous copolymers of PET. For example, incorporation of 20-80% of 2,6-naphthalate, or greater than 30% of isophthalate, will generate amorphous materials [9], Amorphous copolymers of PET, produced by the wholesale substitution of other monomers into the polymeric backbone, rarely possess desirable thermomechanical properties, unlike the Eastman PETG compositions. [Pg.247]

CHDA CHDM DMCD EG IPA N NDA PCT PCTA PCTG PET PETG TMCD TPA cis/trans-1,4-cyclohexanedicarboxylic acid cis/trans-1,4-cyclohexanedimethanol dimethyl cis/trans-1,4-cyclohexanedicarboxylate ethylene glycol isophthalic acid dimethyl 2,6-naphthalenedicarboxylate 2,6-naphthalenedicarboxylic acid poly(1,4-cyclohexylenedimethylene terephthalate) dibasic-acid-modified PCT copolyester glycol-modified PCT copolyester poly(ethylene terephthalate) CHDM-modified PET copolyester c .S / ra .v-2,2,4,4-tetramethyl-l,3-cyclobutancdiol terephthalic acid... [Pg.267]

This report provides an overview of some of the newer polyester compositions based on CHDM. The basic properties and chemistries of PCT have been described in earlier reviews [9, 13]. The CHDM-based polyesters covered in this review are PCT, PCTG, PCTA, and PETG. These compositions are described in more detail in the sections that follow. [Pg.269]

PET modified with up to 50 mol% CHDM is referred to as PETG. This resin is by far the most widely used of the CHDM-based polyesters. [Pg.272]

Structure represents PETG when xis the major glycol component Structure represents PCTG when yis the major glycol component... [Pg.272]

PCT, PETG, PCTG and PCTAs can all be prepared readily via standard melt-phase poly condensation processes [34, 35], The diacid can be delivered via transesterification of the dimethyl esters or via direct esterification of the diacids. Numerous conventional catalyst and catalyst combinations can be employed. The use of a catalyst or catalyst combination is important for the manufacture of polyesters via the melt-phase process and has been well reported in the literature [36-41], Appropriate catalyst systems enable the production of polyesters with high processing rates and high molecular... [Pg.272]

If PCT is modified with relatively high levels of comonomer, substantially amorphous materials result (see the following sections on PETG, PCTG and PCTA). However, it is possible to maintain crystallinity at lower levels of modification. For example, replacing up to about 10mol% of the terephthalate units with isophthalate results in a polymer with reasonable crystallization rates and ultimate degrees of crystallinity. [Pg.276]

Table 7.3 Physical property comparison of amorphous PETG, PCTG and PCTA... Table 7.3 Physical property comparison of amorphous PETG, PCTG and PCTA...
CHDM is a very effective crystallization modifier for PET and as stated earlier low-level modification yields crystalline polyesters (PETGs) that are important... [Pg.280]

Figure 7.8 Refrigerator crisper trays molded from Eastman Eastar PETG 6763. Photograph provided by courtesy of Eastman Chemical Company... Figure 7.8 Refrigerator crisper trays molded from Eastman Eastar PETG 6763. Photograph provided by courtesy of Eastman Chemical Company...
Although the scope of this review mainly covers CHDM-based polyesters modified with isophthalic acid or ethylene glycol (i.e. PCTA or PCTG, and PETG, respectively), many other copolyesters with interesting properties have been prepared with a variety of other comonomers. [Pg.283]

Thermoplastic polyesters (PET, PBT, PETG, PCT, PTMT, PCTG, PEN, PCTA, PTT)... [Pg.413]

See other pages where PETG is mentioned: [Pg.262]    [Pg.149]    [Pg.330]    [Pg.610]    [Pg.689]    [Pg.57]    [Pg.512]    [Pg.730]    [Pg.246]    [Pg.247]    [Pg.269]    [Pg.271]    [Pg.279]    [Pg.280]    [Pg.281]    [Pg.282]    [Pg.283]    [Pg.530]    [Pg.414]    [Pg.733]    [Pg.895]    [Pg.163]    [Pg.176]    [Pg.19]   
See also in sourсe #XX -- [ Pg.211 ]



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