Methyl methacrylate copolymer with

Fullerene-containing polymeric materials have received much attention for their potential technological applications [143-158]. The polymeric fullerene materials under active investigations can roughly be classified into three categories. One category includes copolymers of fullerenes and comonomers [148-154], such as fullerene-styrene and fullerene-methyl methacrylate copolymers. With... 

CHU Chu, J.H. and Paul, D.R., Interaction energies for blends of SAN with methyl methacrylate copolymers with ethyl acrylate and n-butyl acrylate. Polymer, 40, 2687, 1999. 

In a study of the flame retardance of styrene-methyl methacrylate copolymer with covalently bound pyrocatechol-vinyl phosphate, diethyl p-vinyl benzyl phosphonate, or di(2-phenyl ethyl phosphonate) groups. Ebdon and co-workers [23] obtained data on their decomposition behaviour. This was achieved by reducing the rate of liberation of flammable methyl methacrylate monomer during combustion. Possible mechanisms for these processes are suggested. Other methacrylate copolymers which have been the subject of thermal degradation studies include PMMA-N-methylmaleimide-styrene [24] and PMMA-ethylene vinyl acetate [25-27]. 

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. 

KOT Kotaka, T., Tanaka, T., Ohnuma, H., Mnrakami, Y., and Inagaki, H., Dilute solution properties of styrene-methyl methacrylate copolymers with different architecture,... 

Figure 2. Thermal cis-trans isomerization of methyl methacrylate copolymer with 0.9 mole % of p-(N-methacrylyl)aminoazobenzene at 60 C after photochemical trans-cis isomerization at the same temperature (zr. )bulk polymer, (O)polymer plasticized with 30% dioctyl phthalate,( )dilute solution in butyl acetate.

Table 5. Correlation of aromatic proton resonance patterns of styrene-methyl methacrylate copolymers with calculated styrene centered triad fractions...

The influence of polymer surface charge onto bacterial adhesion was also studied by Hogt, et al. They investigated the adhesion of coagul-ase-negative staphylococci to methacrylate/2-hydroxyethylmethacrylate copolymers and methyl methacrylate copolymers with positive or negative charges. 

It has been demonstrated that this principle may be used to characterize polymer compatibility (18). A typical example of the data obtained is shown in Figure 1 for blends of anthracene-labeled poly(methyl methacrylate) (PMMA) and naphthalene-labeled methyl methacrylate copolymers with ethyl or butyl methacrylate. When both the donor and the acceptor... 

AH-acryHc (100%) latex emulsions are commonly recognized as the most durable paints for exterior use. Exterior grades are usuaHy copolymers of methyl methacrylate with butyl acrylate or 2-ethyIhexyl acrylate (see Acrylic ester polymers). Interior grades are based on methyl methacrylate copolymerized with butyl acrylate or ethyl acrylate. AcryHc latex emulsions are not commonly used in interior flat paints because these paints typicaHy do not require the kind of performance characteristics that acryHcs offer. However, for interior semigloss or gloss paints, aH-acryHc polymers and acryHc copolymers are used almost exclusively due to their exceUent gloss potential, adhesion characteristics, as weU as block and print resistance. 

I ew Rubber-Modified Styrene Copolymers. Rubber modification of styrene copolymers other than HIPS and ABS has been useful for specialty purposes. Transparency has been achieved with the use of methyl methacrylate as a comonomer styrene—methyl methacrylate copolymers have been successfully modified with mbber. Improved weatherability is achieved by modifying SAN copolymers with saturated, aging-resistant elastomers (88). 

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) ( ).

Figure 41. A plot of sensitivity to Mo (5.4k) x-ray radiation and 20 kV electron beam radiation for several resists. EPB is epoxidized polybutadiene, P(GMA-EA) is a copolymer of glycidyl methacrylate and ethyl acrylate (COP), PGMA is poly (glycidyl methacrylate), PBS is poly (butene-1 -sulfone), FBM-1 is poly (2,2,3,3-tetrafluoropropyl methacrylate), P(MMA-MA) is a copolymer of methyl methacrylate and methacrylic acid, PMMA is poly (methyl methacrylate). (Reproduced with permission from Ref. 56J...

A study was made of the thermal degradation behaviour of PS foams used as patterns in the lost foam process for metal casting. The data indicated that the thermal degradation of the pattern had a strong effect on mould filling and casting quality. The use of other types of foam such as PE, PP, PMMA and styrene-methyl methacrylate copolymers to overcome problems encountered with PS foam patterns is discussed. 7 refs. 

Fig. 6-3 Variations in feed and copolymer compositions with conversion for styrene (MJ-methyl methacrylate (M2) with (/i)0 = 0.80, (/2)0 = 0.20 and r = 0.53, r2 = 0.56. After Dionisio and O Driscoll [1979] (by permission of Wiley, New York).

Outdoor aging is currently being conducted on these polymers, and while accelerated aging may have limited value in predicting long term outdoor exposure, the accelerated aging studies of Jordan et al. (9) with poly (methyl methacrylate) copolymers and homopolymers indicated that a 2000-hour carbon-arc weatherometer period was a realistic exposure to screen the relative changes to be expected in about a two-year period in an outdoor environment—e.g., Florida or Arizona. 

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