Polyethers poly

Chlorinated polyether Poly(butylene terephthalate) (PBT) talso called... 

Poly(phenylene ether). The only commercially available thermoplastic poly(phenylene oxide) PPO is the polyether poly(2,6-dimethylphenol-l,4-phenylene ether) [24938-67-8]. PPO is prepared by the oxidative coupling of 2,6-dimethylphenol with a copper amine catalyst (25). Usually PPO is blended with other polymers such as polystyrene (see PoLYETPiERS, Aromatic). However, thermoplastic composites containing randomly oriented glass fibers are available. 

These polymers are generally polyethers, poly-(ethylene oxide) (PEO), or poly(propylene oxide) (PPO). 

Other examples of interpolymer complexation due to hydrogen bonding include complexes of poly(ethylene-co-methacrylic acid) with polyethers, poly(2-vinylpyridine), and polyethyloxazoline [107-109], and PAA with poly(vinyl alcohol-co-vinyl acetate) [110]. PAA has even been shown to form stable interchain hydrogen bonded association under high shear flow [111]. 

In their patents, Sheppared et al. [18,19] proposed the synthesis of a series of di- or triblock copolymers from polyazomacroinitiators including various types of sequences polystyrene, polybutadiene, polyamide, poly(butyl sebacate), polyether, poly(butyl azelate) or polycarbonate. They observed that these... 

Carbon-13 spin-lattice relaxation times are measured for poly(octadecyl acrylate) above and below the melting point of the crystalline side chains. The behaviours of lithium ions in a polyether poly(urethane urea) (PEUU) were investigated by C MAS solid-state NMR. ... 

This study included Biomer which is known as the commercial biomedical-use segmented polyether poly(urethane-urea) with excellent mechanical properties and relatively good antithrombogenicity ". This copolymer was repredpitated in diethylether from solution grade Biomer (Ethicon Inc., Somer le, NJ, USA), which is 20 wt.-% solution in dimethylacetoamide, and dried in vacuo at 40°C for 48 h before this study. 

The majority of the structures is prepared from AB2 monomers by polycondensation, to result in hb polyesters, polyamides, polyethers, poly(ester amide)s, polysulfones, poly(ether ketone)s, polyphenylenes (among others), and increasingly also by polyaddition leading to, for example, poly(carbosilane)s, poly(urea urethane)s, polyarylenes, poly(ether amide)s or polythioethers, and many others [6-11, 13, 17, 21]. In particular, cycloaddition reactions offer the advantage of an often very selective and clean, high-yield reaction that is not influenced by special functionalities [33]. The relatively easy synthesis of the hb polyphenylenes described by Mullen et al. [34]. is an excellent example of this. In addition, certain cycloaddition reactions form as Hnear units nonstable intermediates, which allows the preparation of hb polymers without any linear units, which therefore exhibit formally a DB of 100% [35]. 

The thermostability of these dianhydroalditol monomers may be higher than that of other aliphatic diols, which raises the Tg of the corresponding polymers. The most representative dianhydroalditol-based polymers that have been synthesized are polyesters, polycarbonates, polyethers, poly(ester carbonate)s, poly(ester anhydride)s, polyurethanes, polyureas, and poly(ester amide)s. 

Polyethers Poly(propylene glycol) M = 2000-4000) HPLC Analysis Optical density Soi -Corynebacterium sp. Alcaligen denitrificans [103]... 

Paik Sung C, Smith T, Sung N. Properties of segmented polyether poly(urethaneureas) based of 2, 4-toluene diisocyanate. 2. Infrared and mechanical studies. Macromolecules 1980 13(1) 117-21. 

The longitudinal acoustic mode (LAM), measured by Raman spectroscopy, continues to be a powerful means of measuring the average stem length in crystalline polymers. Its application has been extended to polyethers, poly-thioether," and also polytetrafluorethylene and its oligomers. ... 

The following sections describe selected applications of various methodologies involving combined use of the multidimensional NMR experiments described in section 24.2. The sections are divided based on the major classes of fluoropolymers which have commercial and/or scientific significance. These include PVDFs, perflu-orinated polyethers, poly(chlorotrifluoroethylene)s, fluorinated ionomeric polymers, and PTFEs. The applications serve as examples of how multidimensional NMR experiments can be combined to solve stmcture problems in each of these fluoropolymer classes. 

Chlorinated Polyether [poly-3,3-bis-(chloromethyl) oxacyclobutane, Penton ] A corrosion-resistant thermoplastic obtained by polymerization of chlorinated oxetane monomer, the oxetane being derived from Pentaerythritol, to a high molecular weight... 

Luo, N., Wang, D. N., Ying, S. K. (1997), Hydrogen-bonding properties of segmented polyether poly(urethane urea) copolymer. Macromolecules, 30,4405-9. 

Aharoni, S. M. (1979), Hysteresis behavior in polyether poly(urethaneiireas) based on 2,4-toluene diisocyanate, ethylenediamine, and poly(tetramethylene oxide). Macromolecules, 12,539 1. 

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