Methacrylate polymers and copolymers

The most common VI improvers are methacrylate polymers and copolymers, acrylate polymers (see Acrylic ester polymers), olefin polymers and copolymers, and styrene—butadiene copolymers. The degree of VI improvement from these materials is a function of the molecular weight distribution of the polymer. VI improvers are used in engine oils, automatic transmission fluids, multipurpose tractor fluids, hydrautic fluids, and gear lubricants. Their use permits the formulation of products that provide satisfactory lubrication over a much wider temperature range than is possible using mineral oils alone. 

Elvacite Methyl, ethyl, butyl methacrylate polymers and copolymers Du Pont... 

DiPaola-Baranyi, G., "Thermodynamic Miscibility of Various Solutes with Styrene-Butyl Methacrylate Polymers and Copolymers," Macromolecules, 14, 683 (1981). 

Rates of platelet destruction varied from 1.1 x 10 to 5.6 x 10 platelets per cm of exposed surface per day. Since studies evaluating polyurethanes as well as acrylic and methacrylic polymers and copolymers showed that platelet destruction rates may exceed 20 x 10 platelets/cm -day, the nine plasma polymers evaluated were considered to be considerably less reactive. Since each polymer was evaluated only four or five times with average results in each case near the lower sensitivity limit for this test system (about 1 x 10 platelets/cm -day), further statistical interpretations of the data presented in Table 35.7 would be inappropriate. Thus, due to the passive nature of these materials, conclusions could not be drawn regarding the relative importance of specific surface chemical moieties, i.e., all plasma polymers investigated are relatively nonreactive regardless of type of monomer used. This might imply that all type A plasma polymers have the characteristic feature of imperturbable surface regardless of what kind of atoms and moieties are involved, and because of this feature all plasma polymers tested performed better than most conventional polymers. 

Interest in the susceptibility of polypropylene (PP) to degradation, especially by heat, light, oxygen and combinations of these agencies, has kept pace with the increasing commercial application of this material. The purely photo (1-5) and thermal reactions (0 which occur, have been studied in isolation from one another, and it is clear that similar radicals are involved as intermediates in the overall processes. Previous work on acrylate and methacrylate polymers and copolymers (7-8) has demonstrated that the superficial differences in overall degradation mechanism may be attributed to the different ways in which the same primarily produced radicals react in the solid and liquid... 

Methacrylate polymers and copolymers employed to coat anodically oxidized and roughened aluminium sheets. The structures of the polymers are shown in Fig. 1... 

Figure 1. Chemical structures of functional sequences of the methacrylate polymers and copolymers employed to equip anodically oxidized and roughed aluminium surfaces, glass and smooth silicon wafers to control their wetting behavior tert-hvXy methacrylate sequence (a), methyl methacrylate sequence (b), 2-(methacryloyloxy)ethyl acetoacetate sequence (c), 2-hydroxy ethyl methacrylate sequence (d), and Zonyl TM sequence (e).

Brunstedt MR, Ziats NP, Robertson SP, Hiltner A, Anderson JM, Lodoen GA, et al. Protein adsorption to poly(ether urethane ureas) modified with acrylate and methacrylate polymer and copolymer additives. J Biomed Mater Res 1993 27(3) 367-77. 

Capaccioli, S. Castelvetro, V. Rolla, P. A. Raihane, M. Atlas, S. Meskini, A. a-and p-Dielectric Relaxations in Fluorinated Methacrylate Polymers and Copolymers of VinyUdene Cyanide. Results Presented at the 6th International Conference on Broadband Dielectric Spectroscopy and Its Application, Madrid (Spain), September 7-10, 2010 Paper 23, p 201. 

ALKYL METHACRYLATE POLYMERS AND COPOLYMERS Block Copolymers... 

DIENYL METHACRYLATE POLYMERS AND COPOLYMERS PREPARED AS DESCRIBED IN TEXT... 

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