Methacrylate-containing polymers

This heterocycle has been reported to result from a ring expansion reaction of a pendant oxirane with a ketone (75MI11107). The insertion reaction (Scheme 100) was conveniently conducted in high yield by treatment of a solution of a glycidyl methacrylate-containing polymer (208) employing the ketone as solvent. 

The synthesis of methacrylate-containing polymers has been developed to include new monomers. Stearyl side chains were obtained by sequential polymerisation of S and StMA under low-temperature polar conditions with DPE and LiCl present to yield PS-PStMA diblock copolymers (30 < Mn/(kg/mol) < 464 1.04 < Mw/M <1.18) [17]. 

Barbey R, Klok HA (2010) Room temperature, aqueous post-polymerization modification of glycidyl methacrylate-containing polymer brushes prepared via surface-initiated atom transfer radical polymerization. Langmuir 26 18219-18230... 

In methacrylic ester polymers, the glass-transition temperature, is influenced primarily by the nature of the alcohol group as can be seen in Table 1. Below the the polymers are hard, brittle, and glass-like above the they are relatively soft, flexible, and mbbery. At even higher temperatures, depending on molecular weight, they flow and are tacky. Table 1 also contains typical values for the density, solubiHty parameter, and refractive index for various methacrylic homopolymers. 

Synthetic. The main types of elastomeric polymers commercially available in latex form from emulsion polymerization are butadiene—styrene, butadiene—acrylonitrile, and chloroprene (neoprene). There are also a number of specialty latices that contain polymers that are basically variations of the above polymers, eg, those to which a third monomer has been added to provide a polymer that performs a specific function. The most important of these are products that contain either a basic, eg, vinylpyridine, or an acidic monomer, eg, methacrylic acid. These latices are specifically designed for tire cord solutioning, papercoating, and carpet back-sizing. 

Cp—T)2Ti(CH2)2 is used in methyl methacrylate, the polymer contains only traces of tritium. Clearly, the hydrogen for the methane comes from the Cp groups. 

Hydroxy-containing polymers such as poly(methyl-methacrylate-co-hydroxyethyl methacrylate) [65,66] or secondary cellulose acetate [67,68] were used for this purpose. Vanadium (V) 8-hydroxy quinoline-hydroxy-ethyl methacrylate adduct, prepared by condensation of the latter with a VOQ2OH complex, is polymerized to... 

The same procedure can be employed to make well defined comb-like polymers Living polystyrene can be grafted onto a partially chloromethylated polystyrene89 146), or onto a random copolymer of styrene and methyl methacrylate containing less than 10% of the latter monomer I48). 

The physical properties of the acid- and ion-containing polymers are quite interesting. The storage moduli vs. temperature behavior (Figure 8) was determined by dynamic mechanical thermal analysis (DMTA) for the PS-PIBMA diblock precursor, the polystyrene diblock ionomer and the poly(styrene)-b-poly(isobutyl methacrylate-co-methacrylic acid) diblock. The last two samples were obtained by the KC>2 hydrolysis approach. It is important to note that these three curves are offset for clarity, i.e. the modulus of the precursor is not necessarily higher than the ionomer. In particular, one should note the same Tg of the polystyrene block before and after ionomer formation, and the extension of the rubbery plateau past 200°C. In contrast, flow occurred in... 

An NIR optical fiber for the detection of metal ions has been developed In a controlled environment, the optical probe with immobilized NIR dye was immersed in vials containing different metal ions varying in concentrations from 10 9 to 1CT2 M. The probe response was obtained by the diffusion of the metal ions through the poly(2-hydroxyethyl methacrylate) (PHEMA) polymer matrix where the dye was covalently attached. On complexation of the metal with the dye, the intensity of the fluorescence signal increased. 

The copolymers obtained for the P(DMA)-itat-(HPA) (Scheme 9) library revealed relatively low PDI values below 1.3 and increasing Mn,opc values with increasing HPA content, as listed in Tables. It should be noted that a poly(methyl methacrylate) (PMMA) calibration was used for the calculation of the Mn pc values and this causes an overestimation for HPA containing polymers. The copolymer compositions were calculated from the H NMR spectra however, this method was not suitable for reliable conversion determination since the DMA-C//3 groups overlap in the NMR spectra not only with the HPA-O// group but also with broad backbone signals, which obstruct any reliable integration. Therefore, elemental analysis was used as an alternative method for the calculation of the molecular composition of the copolymers. 

Table 13 Number of incorporated monomer units into the 30 triblock copoly(2-oxazoline)s resulting from combined H NMR spectroscopy analyses (top) of the model [A and AB (block co) polymers] and final polymers as well as the measured number average molar masses (Mn,SEC/PDI bottom). H NMR spectra were recorded in CDCI3 or CD2CI2 (PhOx containing polymers) and GPC analyses were performed using DMF (with 5 mM NH4PF6) as eluent. Mn,GPC was calculated utilizing poly(methyl methacrylate) (PMMA) standards...

Lewandowski et aL (2) prepared containing polymers of carbosilane and methacrylate derivatives, (II), which were effective in dental compositions and had a Watts shrinkage of less than 2%. Crosslinkable carbosilane methacrylate monomers, (HI), effective in dental compositions were also prepared by Lewandowski et al. (3) in an earlier investigation that had a Watts shrinkage of less than 2%. Carbosilane derivatives effective in dental compositions were prepared by Bissinger et aL (4) and are described. 

FIGURE 11.5 Degradation of N-a-benzoyl-l-arginine ethyl ester by trypsin. All three carboxyl containing polymers have antitrypsin activity, but the activity of trypsin in the presence poly(ethylene glycol) modified poly(methacrylic acid) is not greatly reduced. (Adapted from Madsen and Peppas 1999.)... 

Figure 8. Difference infrared spectra between the polymers unexposed and exposed to electron-beam of 1 x 10 4 C/cm2. (A) Poly(a,a-diphenylethyl methacrylate-co-methyl methacrylate) containing 74.7 mol% of methyl methacrylate units (B) Poly (methyl methacrylate).

D. Feng, T. Higashihara, and R. Faust, Facile synthesis of diphenyl-ethylene end-functional polyisobutylene and its applications for the synthesis of block copolymers containing poly(methacrylate)s, Polymer, 49(2) 386-393, January 2008. 

Block and graft copolymers were prepared by Akutin, Parlashke-vich, Kogan, Kalinina, and Menes (128) by the use of ultrasonics on solutions of fluorine containing polymers or polysiloxanes on one hand and polymethyl methacrylate, polyvinyl chloride, ethylcellulose on the other. 

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