Laprolate‐803 (L‐803) was used as the model cyclocarbonate resin for reactivity and kinetic studies of non‐isocyanate‐based solventless polyurethanes derived upon the reaction of amines with the 1,3‐dioxolan‐2‐one (dioxolanone) rings of L‐803. It was shown that the reaction could undergo either acid‐, base‐ or metal‐type catalysis yielding polyurethanes with 100% conversion of the dioxolanone rings at approximately half the time needed for their uncatalyzed counterparts. The activation energy of the reaction of L‐803 with diethylene triamine in the presence or absence of a catalyst was determined via Arhenious studies. The reactivity of amines towards the aforementioned model resin was correlated to their chemical structure. A model non‐isocyanate‐based polyurethane displayed Tg of −1°C (DMA), fast gel time (390 min) at room temperature and good elongation (∼70%).

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Some alkenyl-and alkinyl-2-cyanoacrylate monomers, possessing adhesive properties were synthesized. The ease of esterification of cyanoacetic acid, the first step of the synthesis, with some alcohols was in the following order:CH,CH, Die Einfuhrung von Doppel-und Dreifachbindungen erhohte die Festigkeit. Ungesattigte Cyanacrylate zeigten eine bessere Temperaturbestandigkeit der Klebstoffverbindung: CH, = CHCH,-> CH = CCH2-> CH = CC(CH,)H-> CH = CC(C,H,)H-> Alkyl. Dies wurde durch die Bildung einer Vernetzung in der Klebstoffschicht erklart. Dabei wurden IR und TG Analysen herangezogen.

The increasing interest in polymer blending is due mainly to the growing needs for new materials, having diverse combination of properties, and to the problem of plastic waste reuse.' However, only a few miscible polymer blends with industrial application have been reported so far., The specific (proton donor-acceptor) interaction between polymers has proven to play an important role for achieving compatibility. Hydrogen bonding interactions have been credited to yield miscibility in systems, such as poly(methacry1ic acid)/poly(ethylene oxide): poly(methacry1ic acid)/poly(vinyl pyrrolidone)? poly(buty1ene terephthalate)/poly (hydroxyether of bisphenol A): poly(viny1 chloride/poly(methyl methacrylate): poly(viny1 chloride)/poly(rcaprolactone),7 poly(viny1 chloride)/poly(butylene terephthalate):nylon-6/ poly(ethylene-co-acrylic acid)? poly(viny1 chloride)/poly(ethylene-co-N,N'dimethyl acry1amide'O and others.Recently the synthesis of a new polymer, poly(styreneco-vinyl phenyl hexafluorodimethyl carbinol) (PHFA), was reported." PHFA was found to be compatible with bisphenol A polycarbonate, poly(buty1 methacrylate), and poly(2,6dimethyl-l,4-phenylene oxide).'' Evidence for hydrogen-bonding interaction was detected by IR spectroscopy.This paper is a n attempt to investigate the possibility of obtaining miscible polyamide/ PHFA blends, as well as the eventual use of PHFA as a compatibilizer (coupling agent) for polyamide/polystyrene blends.In this study, the criterion of a single glass transition temperature for the mixture is used to determine miscibility. For best results, the polyamide used had to exhibit melting and glass transition at temperatures far away from the T, of polystyrene (PSI and PHFA. Nylon 6,12 (T, = 46°C and T,,, = 20&215"C)12 was chosen as an appropriate material. In order to determine the influence of the PA crystallinity on the polymer miscibility, we synthesized the noncrystalline N,N'dimethyl-substituted nylon 6,1213 and copolymers with different amounts of substitution. EXPERIMENTAL Preparation of PolymersThe polyamides were obtained by polycondensation of the nylon salts. Equimolar solutions of hexamethylenediamine or N;N'dimethyl hexamethylenediamine and 1, lodecanedicarboxylic acid at 10% concentration in absolute ethanol were combined, and the mixture was refluxed for 0.5 h. Crystals of the nylon salt were precipitated from the solution after storage for 24 h in a refrigerator. In the case of the N,N'dimethyl-substituted amine, the nylon salt was separated after addition of ether to the alcoholic solution. The nylon salts were recrystallized from ethanol or ethanolether. The melting points of the 6,12 nylon salt and the N,Ndimethyl substituted 6,12 nylon salt were 158°C and 106, respectively. The polycondensation and copolycondensation of the nylon salts were carried out via three stages: heating at 220°C for 3 h in a container, sealed under reduced pressure; heating at 270°C for 2 h in N, atmosphere; and heating at 270°C for 1 h at 1 mm Hg. The polymers produced were stored for 1 week i...

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