Copolymers polymers

In addition to the polymers, copolymers and alloys already discussed, styrene and its derivatives have been used for the polymerisation of a wide range of polymers and copolymers. Two of the more important applications of styrene, in SBR and in polyester laminating resins, are dealt with in Chapters 11 and 25 respectively. 

BOUNDY, R. H., and BOYER, R, F., Styrene, its Polymers, Copolymers and Derivatives, Reinhold. New York (1952)... 

Homopolymers and copolymers from amido-sulfonic acid or salt containing monomers can be prepared by reactive extrusion, preferably in a twin screw extruder [1660]. The process produces a solid polymer. Copolymers of acrylamide, N-vinyl-2-pyrrolidone, and sodium-2-acrylamido-2-methyl-propane sulfonate have been proposed to be active as fluid loss agents. Another component of the formulations is the sodium salt of naphthalene formaldehyde sulfonate [207]. The fluid loss additive is mixed with hydraulic cements in suitable amounts. 

TABLE 6-3. Immobilization of enzymes and affinity ligands on matrices from polyamides, proteins, or other polymers/copolymers with CDI. 

In the following sections, synthesis of the anionic polymers, copolymer molecular weight, limiting viscosity number, electrolyte effects, solution shear thinning, screen factor, polymer radius of gyration, and solution aging will be discussed and data on the copolymers presented. 

Photophysical Processes in PET and Model Compounds. The photophysical processes in many polymer, copolymer, and polymer-additive mixtures have been studied (17. 18. 19). However, until recently, few investigations have been made concerning the photo-physical processes available to the aromatic esters in either monomeric or polymeric form. 

KEY TERMS hydrophobic hydrophilic monomer cross-linking polymer copolymer hydrogel... 

Polymeric Photoiniferter Monomer (M2) Time (h) Fraction Extracted (%) Unreacted M2 Homo- Block Iniferter polymer Copolymer ... 

Flory, P. J. (1949). Thermodynamics of crystallization in high polymers. IV. A theory of crystalline states and fusion in polymers, copolymers, and their mixtures with diluents. 

Abstract Emulsion homopolymers and copolymers (latexes) are widely used in architectural interior and exterior paints, adhesives, and textile industries. Colloidal stabihzators in the emulsion polymerization strongly affect not only the colloidal properties of latexes but also the fdm and mechanical properties, in general. Additionally, the properties of polymer/copolymer latexes depend on the copolymer composition, polymer morphology, initiator, polymerization medium and colloidal characteristics of copolymer particles. 

Water absorption studies show that homopolymers II do not absorb moisture (to the nearest 0.1 % by weight), which is consistent with reported data on related polymer. Copolymers II absorb water in the range 0.6-5.3 wt%. 

One approach is the use of copolymers. There are a number of variations to this. In some situations, polymer-copolymer combinations are used where the adage the enemy of my enemy is my friend comes into play. Thus, the random copolymer of styrene and acrylonitrile forms a miscible blend with PMMA. The copolymer is composed of nonpolar styrene units and polar acrylonitrile units that are incompatible with one another. These units will blend with PMMA in order to avoid one another. 

Complex polymers are those having a Joint distribution of molecular properties. Branched polymers, copolymers and stereoregular polymers fall within this category. For example, branched polymers have a joint... 

Group Polymer Copolymer Group Polymer Copolymer... 

In addition to the polymer, copolymers of vinyl chloride with other vinyl monomers are important commercial plastics. Copolymers with vinyl acetate, which is produced from acetylene and acetic acid, are widely used in sheeting, surface coating, and filaments, being less brittle and more readily soluble in organic solvents than is pure polyvinyl chloride. Copolymers with acrylonitrile are also of importance for the production of... 

CA 71, 14740u(l969) [Aqueous slurries of inorg oxidizer salts thickened with mixts of partially hydrolyzed acrylamide polymers copolymers and NH4 or alkali metal acrylates are described. Thus, a compn was prepd from water 17.9, propellant 34.8, AN 21.9, NaN03 12.9, ethylene glycol 10.9, pine oil 0.1, 22%... 

Simha,R. Molecular weight and solubility of polystyrene. In Boundy,R.H., Boyer, R.F. Styrene — its polymers, copolymers and derivatives, p. 324. New York Rdnhold Publ. Co. 1952. 

Phenolic resins (phenol-formaldehyde polymers), copolymers of phenol and formaldehyde, were the first fully synthetic polymers made. They were discovered in 1910 by Leo Baekeland and given the trade name Bakelite . 

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