Butylmethacrylate

Poly(styrene-fr-2-vinylpy r idin e-b-tert-butylmethacrylate)... 

Fig. 21. Separation of cytochrome (peak 1), ribonuclease, (peak 2), carbonic anhydrase (peak 3), lysozyme (peak 4), and chymotrypsinogen (peak 5) by hydrophobic interaction chromatography on a molded poly(acrylamide-co-butylmethacrylate-co-N,AT,-methylenebisacry-lamide) monolithic column. (Reprinted with permission from [ 135]. Copyright 1998 Elsevier). Conditions column, 50 x8 mm i.d., 10% butyl methacrylate,mobile phase gradient from 1.5 to 0.1 mol/1 ammonium sulfate in 0.01 mol/l sodium phosphate buffer (pH 7) in 3 min, gradient time 3.3 min, flow rate 3 ml/min...

Chung, J. E., Yokoyama, M., Yamato, M., Aoyagi, T., Sakurai Y., and Okano, T. Thermo-responsive drug delivery from polymeric micelles constructed using block copolymers of poly(A-isopropylacrylamide) and poly(butylmethacrylate), J. Contr. Rel, 1999, 62, 115-127. 

Polyurethane-acrylic coatings with interpenetrating polymer networks (IPNs) were synthesized from a two-component polyurethane (PU) and an unsaturated urethane-modified acrylic copolymer. The two-component PU was prepared from hydroxyethylacrylate-butylmethacrylate copolymer with or without reacting with c-caprolactonc and cured with an aliphatic polyisocyanate. The unsaturated acrylic copolymer was made from the same hydroxy-functional acrylic copolymer modified with isocyanatoethyl methacrylate. IPNs were prepared simultaneously from the two-polymer systems at various ratios. The IPNs were characterized by their mechanical properties and glass transition temperatures. 

This paper describes two types of novel urethane-acrylic IPNs for coating applications. The mode of preparation used was the simultaneous or SIN technique. In order to examine the effect of the soft segment on the properties and morphology of IPN coatings, the pendant hydroxy group in the hydroxyethylacrylate-butylmethacrylate copolymer was reacted with caprolactone to increase the chain length of the pendant hydroxy group. 

Films cast from poly(n-butylmethacrylate) and polymethylmethacrylate)... 

The fusion of LC phases above Tcl causes a sharp change in the character of flow and the values of Ef for nematic and smectic polymers become closer. In an isotropic phase Ef for a polymeric smectic ( 140 kJ/mole) is only twice as large as Ef for a polymeric nematic (70—80 kJ/mole). In other words, the transition from LC phase to isotropic melt, accompanied by the liberation of mesogenic groups from the mesophase levels the differences in the character of flow of smectic and nematic polymers. The differences in Ef for isotropic phase are determined only by the differences in chemical nature of the main chain of smectic and nematic polymers. The values of Ef, in this case, are close to the Ef values for poly(butylmethacrylate) and poly(butylacrylate), respectively, which are structurally similar to polymers XI and XII except that they do not contain mesogenic groups. 

The study of the reasons for the formation of intramolecular structures reveals that the enhanced interaction of cholesterol groups occuring on cooling is very important. The dilution of the sequence of cholesterol-containing monomeric units by butylmethacrylate units (copolymers of ChMA-11 with butylmethacrylate) leads gradually to the degeneration of the conformational transition (Fig. 31, curves 3-5). 

In the case of non-symmetrical volume composition, Elbs et al. facilitated different phases in polys(yrene-Wod -poly(2-vinylpyridinc)-6/od -poly(/c/7-butylmethacrylate) (SVT) films by exposing them to different solvent vapors (Fig. 28). Further studies indicated a large morphology dependence on the annealing vapor and drying conditions [4], Rehse et al. demonstrated the presence of... 

The immobilization of MTO on poly(vinylpyridine) or its oxide was also tested, but here, the conversions are a bit lower [56]. Furthermore, the effect of comonomers in PVP, such as butylmethacrylate or ethyleneglycoldimethacrylate, was explored. With some of these systems, excellent selectivity for the epoxide was... 

Frechet and coworkers recently described how living free radical polymerization can be used to make dendrigrafts. Either 2,2,6,6-tetramethylpiperidine oxide (TEMPO) modified polymerization or atom transfer radical polymerization (ATRP) can be used [96] (see Scheme 10). The method requires two alternating steps. In each polymerization step a copolymer is formed that contains some benzyl chloride functionality introduced by copolymerization with a small amount of p-(4-chloromethylbenzyloxymethyl) styrene. This unit is transformed into a TEMPO derivative. The TEMPO derivative initiates the polymerization of the next generation monomer or comonomer mixture. Alternatively, the chloromethyl groups on the polymer initiate an ATRP polymerization in the presence of CulCl or CuICl-4,4T dipyridyl complex. This was shown to be the case for styrene and n-butylmethacrylate. SEC shows clearly the increase in molecu-... 

Besides the above-mentioned approaches varying the parameters governing the initiator decomposition, it is worth mentioning an interesting biphasic study based on the difference of solubility of monomers and the use an original amphiphilic bifunctional initiator, the palmitoyl (3-carboxy propionyl) sebacoyl diperoxide 3 [24], In such conditions, block copolymers of water soluble (acrylamide) and oil soluble (butylmethacrylate) monomers can be obtained by interfacial radical copolymerization as follows ... 

Poly(acrylic acid-co-butylmethacrylate) functionalized with cyclometalated luminescent complexes, (II), were prepared by Fryd [2] and used as high efficiency organic light-emitting devices. 

Loutfy et al. (1983) measured the photoconductivity of a series of squaraines dispersed in a styrene butylmethacrylate copolymer. The generation efficiencies were strongly field dependent. In most materials, a quadratic field dependence was observed. For MSQ, the results were in agreement with Tam. At high fields, the efficiency was approximately 0.70. 

Neutralizing these polyesters with different hydroxyamines made it possible to obtain stable micellar systems. The size of these micelles was shown to essentially be a function of the structure and the polyester molecular weight. The smallest micelles are obtained with diacid polyester of lower molecular weight. A model for the chain conformation of polyester in a micelle was proposed, taking into account the area occupied by one end group located at the micelle surface. Furthermore, such micelles were demonstrated to be able to solubilize non-neutralized polyester chains, as well as monomers like styrene or butylmethacrylate (BMA). 

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