Hydroxyl-terminated characterization

Brosse, J.-C., Derouet, D., Epaillard, F., Soutif, J.-C., Legeay, G. and Dusek, K. Hydroxyl-Terminated Polymers Obtained by Free Radical Polymerization. Synthesis, Characterization, and Applications. Vol. 81, pp. 167—224. 

Recently, Cohn and Salomon synthesized and characterized a series of PLCL thermoplastic bioelastomers by two-step synthesis procedure. First, ring-opening polymerization of L-lactide initiated by the hydroxyl terminal groups of the PCL chain. Second, chain extension polymerization of these PLA-PCL-PLA triblocks initiated by the hexamethylene diisocyanate (HDl). 

Poly(methyl 3-(l-oxypyridinyl)siloxane) was synthesized and shown to have catalytic activity in transacylation reactions of carboxylic and phosphoric acid derivatives. 3-(Methyldichlorosilyl)pyridine (1) was made by metallation of 3-bromopyridine with n-BuLi followed by reaction with excess MeSiCl3. 1 was hydrolyzed in aqueous ammonia to give hydroxyl terminated poly(methyl 3-pyridinylsiloxane) (2) which was end-blocked to polymer 3 with (Me3Si)2NH and Me3SiCl. Polymer 3 was N-oxidized with m-ClC6H4C03H to give 4. Species 1-4 were characterized by IR and H NMR spectra. MS of 1 and thermal analysis (DSC and TGA) of 2-4 are discussed. 3-(Trimethylsilyl)-pyridine 1-oxide (6), l,3-dimethyl-l,3-bis-3-(l-oxypyridinyl) disiloxane (7) and 4 were effective catalysts for conversion of benzoyl chloride to benzoic anhydride in CH2Cl2/aqueous NaHCC>3 suspensions and for hydrolysis of diphenyl phosphorochloridate in aqueous NaHCC>3. The latter had a ti/2 of less than 10 min at 23°C. 

Characterization of Hydroxyl-Terminated Liquid Polymers of Epichlorohydrin... 

Wang B, Zheng Y et al (2013) Synthesis, structural characterization and performance evaluation of nitrated hydroxyl-terminated polybutadiene. Chem Propellants Polym Mater 11 (4) 76-78... 

Fatty alcohol ethoxylates were spotted and characterized by Spriestersbach, Rode, and Pasch [128]. Other applications of semi-on-line LC—MALDl coupling via a spraying interface for synthetic polymers involve copolyesters [129], silsesquioxanes [130], and hydroxyl-terminated polydimethylsiloxane [131,132]. Reference [103] summarizes different applications, comparing their advantages and drawbacks. 

Broadband Dielectric Spectroscopic Characterization of the Hydrolytic Degradation of Hydroxyl-Terminated Poly(D,L-lactide) Materials... 

Polycyanurate network was modified with hydroxyl-terminated polyester, poly(butylene glycol adipate), PBGA, by polycyclotrimerization of bisphenol A dicyanate in the immediate presence of PBGA [18]. The modified networks with PBGA content from 5 to 20 wt. % were characterized by a combination of FTIR, DSC, TMA, TGA, impact testing and sol-gel analysis. It has been established that almost the whole PBGA was chemically incorporated into the PCN structure. It is supposed that the chemistry of such incorporation is the same as that shown in Figure 2. 

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