R-Butyl methacrylate

Poly(r-butyl methacrylate) Poly(cyclohexyl methacrylate)... 

Helix-sense-selective polymerization of methyl, benzyl, and r-butyl methacrylates was attempted by using the complexes of chiral crown ethers, 91 and 92, and that of a chiral diamine 93 with n-BuLi however, these esters seem to be too small to form and maintain helical conformation [138,139]. The complexes of BuLi with 58a and 59 failed in producing an optically active, helical polymer in the polymerization of methyl and benzyl methacrylates [104b]. 

Figure 11. Conversion vs. weight fraction styrene in monomer, styrene n-butyl methacrylate (samples as for Figure 10) ((------) ti = 0.68, r == 0.45 (------)...

Figure 3. Time dependence of the fraction R of unreacted aminostyrene residues during acetylation by 0.14 M acetic anhydride at 30°C. Methyl methacrylate copolymer in acetonitrile solution (0) linear poly-(methyl methacrylate-co-butyl methacrylate) swollen with acetonitrile Cd) methyl methacrylate copolymer crosslinked with 1 mole% ( ) and with 15 mole% ( ) ethylene dimethacrylate poly(methacrylate crosslinked with 3 mole% ethylene dimethacrylate containing entrapped poly(methyl acrylate-co-aminostyrene) ( ).

Fig. 4. Polymerizations of ferf-butyl methacrylate ( BMA) initiated with (TPP)AlMe (1,X= Me) [ BMA]q/[1 (X=Me)]o=100, [l]o=17.8 mM, CH2CI2 as solvent. GPC profiles of the polymers formed I After 90-h irradiation at 35 °C, 25% conversion, and II In 60 min after addition of trimethylaluminum (Me3Al), ([Me3Al]o/[2 (R= Bu)]q=0.25) at rt, 100% conversion...

N. Martinez-Castro, M.G. Lanzendorfer, A.H.E. Muller, J.C. Cho, M.H. Acar, and R. Faust, Polyisobutylene stars and polyisobutylene-block-poly(tert-butyl methacrylate) block copolymers by site transformation of thiophene end-capped polyisobutylene chain ends, Macromolecules, 36(19) 6985-6994, September 2003. 

In fact Schulz and co-workers (131,134), and Klabunovskii, Shvartsman and Petrov (55) report that the O. R. D. curves of poly-menthyl-acrylate, poly-bornyl-acrylate and poly-2-methyl-butyl-methacrylate show a maximum at about 300 mp, the wavelength corresponding to the maximum being related to the method of preparation of the polymer. Circular dichroism measurements seem advisable in order to confirm the existence of a Cotton effect postulated by the above authors in that wavelength range. 

As shown in Scheme 1, GTP converts methacrylate monomer to a polymer with one end group corresponding to the R on the initiator and the other end a trimethylsilyl ketene acetal. If the initiator contains a vinyl group not reactive to GTP, a macromonomer results [8]. The silyl ketene acetal end can be used to initiate another monomer, for example butyl methacrylate, to give... 

C 8 — and R. A. Guzzi Poly-n-butyl-methacrylate. III. Dilute solution properties by viscosity and light scattering. J. Polymer Sci. 21, 417 (1956). 

It is a tertiary alcohol with the hydroxyl group flanked by two identical R (= butyl) groups. The chemists who wanted to make the compound knew that an ester would react twice with the same organolithium reagent, so they made it from this unsaturated ester (known as methyl methacrylate) and butyllithium. 

Notes r=reaction temperature, Tg =glass transition temperature, PS=polystyrene, PMMA = poly(methyl methacrylate), PPMA=poly(propyl methacrylate), PBMA=poly(butyl methacrylate). 

R. Okada, and H. Fujita Viscosity of poly(alkyl methacrylate) plasticized with diethyl phthalate. Poly-(n-butyl methacrylate). J. Phys. Chem. 67, 1228 (1963). 

Polymers containing oxazoline groups are obtained either by grafting the 2-oxazoline onto a suitable existing polymer such as polyethylene or polyphenylene oxide or alternatively by copolymerising a monomer such as styrene or methyl methacrylate with a small quantity (<1%) of a 2-oxazoline. The grafting reaction may be carried out very rapidly (3-5 min) in an extruder at temperatures of about 200°C in the presence of a peroxide such as di-r-butyl peroxide Figure 7.13). 

Poly(ethyl a-chloroacrylate) Poly(2-methylcyclohexyl methacrylate) Polyisobutylene Poly(2-r-butyl-1,4-butadiene) Poly(cyclohexyl methacrylate)... 

To overcome such limitations, Imura et al. covered the surface of a silica gel with sulfonated cross-linked polystyrene [5]. After adsorption of styrene, divinyl-benzene, and r-butyl peroxide and subsequent free-radical polymerization, the acid groups are introduced via classical sulfonation. Control of the thickness of the crosslinked polymer layer on the surface is essential to prevent pore clogging. This sulfonated polystyrene-Si02 hybrid material preserves a large specific surface area, with a typical ion-exchange capacity of 1.8 meq g. Alternatively, a sulfonated layer can be deposited on silica by copolymerization of silica-supported methacrylate and potassium p-styrene sulfonate [6]. 

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