Glycol terephthalate

Based on this analysis it is evident that materials which are biaxially oriented will have good puncture resistance. Highly polar polymers would be resistant to puncture failure because of their tendency to increase in strength when stretched. The addition of randomly dispersed fibrous filler will also add resistance to puncture loads. From some examples such as oriented polyethylene glycol terephthalate (Mylar), vulcanized fiber, and oriented nylon, it is evident that these materials meet one or more of the conditions reviewed. Products and plastics that meet with puncture loading conditions in applications can be reinforced against this type of stress by use of a surface layer of plastic with good puncture resistance. Resistance of the surface layer to puncture will protect the product from puncture loads. An example of this type of application is the addition of an oriented PS layer to foam cups to improve their performance. 

Hoftyzer, P. J., Kinetics of the polycondensation of ethylene glycol terephthalate, Appl. Polym. Symp., 26, 349-363 (1975). 

Yokoyama, H Sano, T Chijiiwa, T. and Kajiya, R., Degradation reactions in ethylene glycol terephthalate polycondensation process,. /. Jpn. Petrol. Inst., 21, 194-198 (1978). 

The quantities da and d (In da) / d T are calculated by means of the RIS model. Better agreement between the theoretical and experimental values of these parameters is found for polyftriethyiene glycol terephthalate) than for polyfdiethylene glycol terephthalate). Since the polarities of these two chains are similar, intermole cular interactions involving terephthaloyl residues may be responsible for the discrepancies observed between theory and experiment for Aa in aromatic polyesters. 

Authors give a short description of a RIS model developed for polylpropylene glycol terephthalate), PPT. This model is based on the known RIS models for PET. Statistical weight parameters and torsion angles of the chain are discussed. Simple scrutiny of structural characteristics of PPT chains indicate that certain conformations that are accessible in PET are suppressed in PPT. In this work, the dipole moment of these chains and its temperature coefficient are measured and the results compared with those calculated using statistical mechanics. A comparative study of the polarity of PPT and PET is also made. 

PB PBI PBMA PBO PBT(H) PBTP PC PCHMA PCTFE PDAP PDMS PE PEHD PELD PEMD PEC PEEK PEG PEI PEK PEN PEO PES PET PF PI PIB PMA PMMA PMI PMP POB POM PP PPE PPP PPPE PPQ PPS PPSU PS PSU PTFE PTMT PU PUR Poly(n.butylene) Poly(benzimidazole) Poly(n.butyl methacrylate) Poly(benzoxazole) Poly(benzthiazole) Poly(butylene glycol terephthalate) Polycarbonate Poly(cyclohexyl methacrylate) Poly(chloro-trifluoro ethylene) Poly(diallyl phthalate) Poly(dimethyl siloxane) Polyethylene High density polyethylene Low density polyethylene Medium density polyethylene Chlorinated polyethylene Poly-ether-ether ketone poly(ethylene glycol) Poly-ether-imide Poly-ether ketone Poly(ethylene-2,6-naphthalene dicarboxylate) Poly(ethylene oxide) Poly-ether sulfone Poly(ethylene terephthalate) Phenol formaldehyde resin Polyimide Polyisobutylene Poly(methyl acrylate) Poly(methyl methacrylate) Poly(methacryl imide) Poly(methylpentene) Poly(hydroxy-benzoate) Polyoxymethylene = polyacetal = polyformaldehyde Polypropylene Poly (2,6-dimethyl-l,4-phenylene ether) = Poly(phenylene oxide) Polyp araphenylene Poly(2,6-diphenyl-l,4-phenylene ether) Poly(phenyl quinoxaline) Polyphenylene sulfide, polysulfide Polyphenylene sulfone Polystyrene Polysulfone Poly(tetrafluoroethylene) Poly(tetramethylene terephthalate) Polyurethane Polyurethane rubber... 

Most of the companies already producing diethylene glycol terephthalate polymers have launched into the applications of polyester film to video and data processing, Hoechst through its Kalle subsidiary, ICI, Rhone-Poulenc, Du Pont, Japan s Toray, Teijin, and Toyobo, the latter in association with Rhone-Poulenc in Nippon Magphane. 

Polylactic acid and 3 GT (3 carbon glycol terephthalate) are two biopolymers that are already being successfully produced in pilot plants. Their manufacturers (Dow for PLA and DuPont/Genencor for 3GT) expect to reduce the production cost to USD 1 per kilo or even lower by 2003. These biopolymers will then become competitive with polyester and nylon chips. Dow and DuPont have both begun the constraction of large-scale biopolymer production plants. 

By using diols and diacids we can form polymers with two different structural units which together become the repeating unit. An example of an ARjA plus BRjB reaction is diait used to make Coca-cola bottles, i.e. terephthalic acid plus ethylene glycol to form poly (ethylene glycol terephthalate). 

HOCH2CH2OH f HOOC C COOH Ethylene glycol Terephthalic acid... 

An example of a Py-GC/MS analysis of a sample of poly[butylene terephthalate-co-poly(butylene glycol) terephthalate] is shown in Figure 10.1.15. The pyrolysis was done in similar conditions as for other examples, at 600° C in He at a heating rate of 20° C/ms. with 10 s THT. The separation was done on a Carbowax column with the GC starting at 40° C with a ramp of 2° C/min. up to 240° C and a final oven time of 20 min. (see Table 4.2.2). The peak identification for the pyrogram from Figure 10.1.15 is given in Table 10.1.11. 

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