Styrene 1 butylacrylate copolymers

By combining Raman imaging with photoacoustic FT-IR and FT-IR microscopy three-dimensional maps of the heterogeneous degradation of epoxy and polyurethane films exposed to UV and water vapor were obtained [241]. Similarly, the phase separation in styrene/butylacrylate copolymers and latex films were analyzed [242]. Blakey and George used point illumination Raman mapping to investigate the surface of photooxidized PP with a lateral resolution of 1 im and successfully mapped the distribution of both oxidation products (Q ,/3-unsaturated ketones) and catalyst residues [239]. The distri-... 

MBA copolymer of butadiene, butylacrylate and methylmethacrylate Styrene-acrylonitrile copolymer (SAN)... 

Chem. Descrip. Aqueous dispersion of styrene/n-butylacrylate copolymer (50%), emulsifier... 

Zhao H, Shipp DA (2003) Preparation of poly(styrene-butylacrylate) block copolymer-sdicate nanocomoposites. Chem Mater 15 2693-2695... 

Borsenberger et al. (1993) measured hole mobilities of TAPC doped into a series of styrene (S) butylacrylate (BA) copolymers with different dipole moments. The dipole moments of the S and BA monomers are 0.40 and 1.52 Debye. By varying the S BA ratio from 100 0 to 50 50, the copolymer dipole moment can be varied from 0.40 to 0.96 Debye. Figure 35 shows the room temperature field dependencies for different S BA ratios. The mobilities vary by nearly two orders of magnitude, increasing with decreasing copolymer dipole moment. In all cases, the field dependencies were described as logp,... 

Chem. Descrip. Aqueous dispersion of a styrene/n-butylacrylate/acrylic acid/acrylamide copolymer (50%), emulsifier Uses Binder in solv.-free and plasticizer-free paints, low-emission wall paints... 

Styrene/n-butylacrylate/acrylic acid/acrylamide copolymer... 

Vinac 828M binder, iotions Propylene glycol alginate binder, iow-emission waii paints Lipaton AE 3723 Styrene/n-butylacrylate/ acrylic acid/acrylamide copolymer binder, iow-VOC coatings Silicone Resin Emulsion BS 43A Silres MP42E... 

Copolymerization is the most important synthetic strategy available to tailor the physical, solution and mechanical properties of macromolecules. In this paper the synthesis of well defined random and block copolymers containing monomer units of very different polarity are described. Novel macromolecular architectures incorporating 4-hydroxystyrene, t-butylacrylate and styrene have been prepared to investigate the combined effects of macromolecular architecture and hydrophobicity on thin film aqueous base dissolution. 

Commercial impact-modified acrylic resins (Table 19.15) exhibit five- to tenfold improvement in the notched Izod impact strength and the ultimate tensile elongation compared to the neat PMMA resin. These impact-modified acrylics are usually blended captively by the manufacturers of the acrylic resins. The base resin in a typical weatherable grade (Plexiglas DR, Rohm and Haas) could be a methyl methacrylate copolymer with ethylacrylate and styrene, while the rubber additive (ca. 10 %) could be an emulsion-polymerized, PMMA-grafted, cross-linked poly (n-butylacrylate) rubber of controlled particle size (<200 nm). The nonweatherable impact-modified acrylic (XT, CYRO) typically consists of a MMA/S/AN copolymer with MBS (ca. 10 %) rubber particle dispersions. 

Following this Hne, Negrete-Herrera et al. recently synthesized PLS nanocomposites based on a synthetic clay Laponite and a fihn-forming copolymer of styrene and butyl acrylate (polystyrene-co-butylacrylate) through emulsion polymerization. 

The copolymerization of a,p-unsaturated ketones has been studied extensively in order to improve the poor chemical and thermal stability exhibited by the homopolymers. The vinyl ketones have been copolymerized with most of the common vinyl and diene monomers. The data are given in Ref. [326]. For initiation, the same reagents could be used as for free-radical homopolymerization. Copolymerization was carried out in bulk [371] and in emulsion systems [372]. In copolymerization with methyl methacrylate, vinyl acetate [373], and styrene [371] it was concluded that the relative reactivities of the vinyl ketones increase with the increasing electron-withdrawing nature of the vinyl ketone substituent. Polar and steric effects are not observed. Most of the work has been directed toward the preparation of oil- and solvent-resistant rubbers to replaee styrene-butadiene rubber. Emulsion eopolymerization of butadiene with methyl isopropenyl ketone yielded rubbers with good solvent resistance and low temperature flexibility, but the products tended to harden on storage and were not compatible with natural rubber [374]. The reactive earbonyl function caused sensitivity to alkine reagents. Copolymers of butylacrylate and methyl vinyl ketone, for example, can be erosslinked by treatment with hydrazine [375]. 

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