AMINE COPOLYMER

Acrylamide/amine copolymers (+ amine deriv.) Anionic flocculants... 

Keywords Metal surface Poly(vinyl amine) copolymers Polyelectrolyte adsorption Solvatochromic measurements X-ray photoelectron spectroscopy... 

Copolymers of furfural with pyrrole have been reported to yield carbon fibers of remarkable quality (22). More recent reports include the use of poly(N-vinylcarbazole) with furfural and furfural-amine copolymers (23) to make both cation/anion exchange resins. A considerable amount of additional work needs to be done in this area to determine the commercial usefulness of such systems. 

Phase separation in initially miscible blends of thermoplastic (TP) and epoxy-diamine occurs during the reaction because the increase in the molecular weight of epoxy-amine copolymers diminishes the entropy of the blend. We can consider our systems as pseudobinary blends of TP and copolymer epoxy-amine for ease of understanding. The Flory-Huggins theory can be used in this case (I, 2). The miscibility during the reaction is controlled by the... 

But VD is always greater than c >a0. This fact means that the dispersed phase is not formed only of pure rubber additive, R, but also contains some epoxy-amine copolymer. It can be about 50 wt%. A second phase separation has been demonstrated to occur inside the dispersed particles. (9)... 

GMA-EGDM copolymer beads were synthesised as reported earlier [16]. The surface area and pore volume were determined by mercury porosimetry. 2-Picolyl amine copolymers were generated by reacting 17 mmole of 2-picolyl amine with 5g (8.5 mmole) of GMA-EGDM copolymer in ethanol at 70°C for 24 hours. 

In this case, with the P-phase semipermeable to mass transfer, the thermodynamic simulation was carried out as follows. Once a and P-phases were generated, kinetic equations were solved independently for both phases. After a differential time, the a-phase was driven to equilibrium segregating a differential amount of material rich in modifier that was incorporated in the P-phase. At this time, the P-phase, modified both by the material received from the a-phase and the evolution of species through the continuation of the polymerization, was driven to equilibrium. Under these conditions, a secondary phase separation (i.e. a phase separation inside the P-phase) took place, as shown in Fig. 24. The Y-phase (dispersed phase inside particles of the p-phase) is rich in epoxy-amine copolymer whereas the 5-phase (continuous matrix inside particles of the P-phase - also called submatrix), is rich in the modifier. While y- and 5-phases are always at equilibrium, a- and P-phases are not, due to the semipermeable character of the latter. It is observed that, as most of the phase separation takes place at conversions close to the cloud point, the P-phase keeps a significant proportion of epoxy-amine copolymer even at high overall conversions. This agrees with experimental estimations of the composition of dispersed-phase particles in rubber-modified epoxies [103,104]. 

Compatibilization improves the morphological stability of polymer blends when block or graft copolymers are used by the introduction of steric hindrance to drop coalescence. A chemical approach is possible for formation of grafted PC with SAN chains at the PC/SAN interface. SAN-amine copolymer is prepared by reaction of a terpolymer of styrene, maleic anhydride, and acrylonitrile with l-(2aminoethyl) piperazine. The SAN-amine polymer is miscible with the SAN matrix of ABS and reacts with PC. The formation of graft polymer has resulted in the reduction of SAN dispersed-phase particle size. The blend morphology has been found to stabilize in the mixing process. 

Fig. 12.2. Structural formulae of typical silicone compounds used in cosmetic formulations (a) cyclic siloxane (b) linear siloxane (c) siloxane-polyethylene oxide copolymer (d) siloxane-polyethylene amine copolymer.

Kiji and co-workers [87] investigated the composition and microstructure of alternating olefin-carbon monoxide copolymers and their derivatives including ethylene-styrene-carbon monoxide alternating polymer, norbornene-amine copolymer and polymers modified with phosphorus pentasulfide or phosphorus pentoxide or primary amines. 

The physical properties of both polystyrene-poly(amido-amine) and polyethylene-poly(amido-amine) copolymers with a poly(amido-amine) content of 8-16% by weight have been evaluated, and found to be similar to that of slightly plasticized polystyrene and polyethylene... 

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