Polyoxypropylene diamine

Lichtenhan et al. [23,24] prepared several monosubstituted POSS epoxides (XIX). The Cs-based chain epoxy (5-9 wt%) was used with 1,4-butanediol diglycidyl ether (EDGE) (XX), diglycidyl ether of Bisphenol A (DGEBA) (XXIII) and polyoxypropylene diamines (XXI) to prepare nano-reinforced epoxy network glasses (Scheme 6) [23]. 

Hsueh and Chen reported the preparation of a LDH-epoxy nanocomposite by standard in situ polymerization. They synthesized an aminolaurate-modified LDH by the coprecipitation method at a constant pH. The clay (filler content 3 to 7 wt%) was swelled in DGEBA at 55°C for 3 h mixed 2 h at room temperature with the curing agent, a commercial polyoxypropylene diamine (Jeffamine D400, Huntsman Corp.) and cured at 75°C for 3 h and 135°C for an additional 3 h. XRD patterns showed that during the swelling the [Pg.256]

Thermal Decomposition of Polymeric Nanocomposites Based on Anionic Clays The thermal decomposition of DGEBA nanocomposites cured with polyoxypropylene diamine (Jeffamine D230) and containing 4-toluenesul-fonate/LDH was investigated by simultaneous thermal analysis (STA) in air. The LDH nanocomposite (TS/LDH) is compared to the neat epoxy and to a bis(2-hydroxyethyl)ammonium montmorillonite nanocomposite (30B). The clay content was 5 wt% for both nanocomposites. In Figure 9.24, differential thermal analyses obtained by STA are shown. A main exothermic peak is observed at about 550° C for neat epoxy. In the LDH nanocomposite this peak is split in two parts, so the heat release rate is decreased and the heat evolution delayed, where as no relevant difference is observed between neat epoxy and the cationic clay nanocomposite. 

AH samples are based on DGEBA cured with polyoxypropylene diamine (Jeffamine D230, Huntsman Corp.) for 5 h at 50°C and 2 h at 110°C. The filler content is 5 wt%. 

In this contribution, we report equilibrium modulus and sol fraction measurements on diepoxidet-monoepoxide-diamine networks and polyoxypropylene triol-diisocyanate networks and a comparison with calculated values. A practically zero (epoxides) or low (polyurethanes) Mooney-Rivlin constant C and a low and accounted for wastage of bonds in elastically inactive cycles are the advantages of the systems. Plots of reduced modulus against the gel fraction have been used, because they have been found to minimize the effect of EIC, incompleteness of the reaction, or possible errors in analytical characteristics (16-20). A full account of the work on epoxy and polyurethane networks including the statistical derivation of various structural parameters will be published separately elsewhere. 

The Pluronic and Tetronic surfactants (BASF) are examples of the polyoxyethylenated (PEO) polyoxypropylene (PPO) glycol type of nonionic surfactants. The Pluronic surfactants, are PEO-PPO-PEO triblock copolymers in which the PEO portion constitutes between 10 and 80% of the copolymer [92]. Pluronic F38 and F68 (both with HLB > 24) are typical examples of these surfactants used in emulsion polymerization formulations. The Tetronic surfactants are tetrafunctional block copolymers prepared from the addition of FPO and PEO to ethylene diamine, lypical examples of the Tetronic surfactants used in emulsion polymerization are Tetronic 707 and 908 (HLB > 24). The addition of these types of surfactants enhances freeze-thaw, shear and electrolyte stability, results in low foam formation and typically decreases the water sensitivity. 

Definition Polyoxyethylene, polyoxypropylene block polymer of ethylene diamine... 

Definition Polyoxyethylene, polyoxypropylene block polymer of ethylene diamine Properties Nonionic Toxicoiogy TSCA listed Uses Emulsifier, thickener, wetting agent, dispersant, solubilizer, stabilizer in cosmetics, pharmaceuticals demulsifier in petrol, industry detergent ingred. antistat for polyethylene and resin molding powds. polymerization in latex-based paints, aq.-based syn. cutting fluids and vulcanization of rubber... 

Liquid-NCO terminated prepolymers, which are primarily based on low-viscosity polyoxypropylene glycols and TDI require only a small amount of solvent (5-10%). However, the solvent remains in the finished dispersion. In addition the reaction of the primary emulsion with water or diamines, which results in the formation of poly urea, is dependent upon diffusion and difficult to control. 

A more recent study of the inverse emulsion polymerization of acrylamide (58) used the recipe given in Table XIV. The aqueous monomer solution was emulsified in the o-xylene solution of Tetron-ic 1102 (polyoxyethylene-polyoxypropylene-ethylene diamine adduct BASF Wyandotte), and heated under agitation to the polymerization temperature of 60 . The polymerization rates were measured gravi-metrically. The conversion-time curves varied significantly some showed autoacceleration, others did not many showed no linear or near-linear region. In contrast, the inverse emulsion polymerization of diethylaminoethyl methacrylate hydrochloride using the same recipe gave linear conversion-time curves. 

Recently, Tanaka et. al developed the gelation model for the polymerisation of epoxy and diamine including the effects of unequal reactivity and intramolecular reaction, where the ring-forming parameter was introduced to characterise the competition between intermolecular and intramolecular reactions.(Tanaka, et al., 2009) This section is concerned with the gelation model developed and its application to the polymerisation of polyoxypropylene (POP) diamine and the diglycidyl ether of bisphenol A (DGEBA), RAj + R B2 type polymerisation. 

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