Urethane methacrylate polymer

Figure 9.4 Comparison of Voigt and Reuss models with experimental data for a urethane methacrylate polymer (no polyol soft-block) filled with silica sand...

The urethane methacrylate polymer which contains no soft-block and the ethoxylated bisphenol A/MMA copolymer both have relatively low values of K q and their composites have fracture toughnesses approximately double that of the respective polymer. The urethane methacrylate polymer which contains a polyol soft-block, on the other hand, has a fracture toughness which is approximately twice that of the other polymers, but for the composite Kiq is increased only modestly. Thus, the higher the fracture toughness of the polymer then the less is the fracture toughness of the particulate composite enhanced relative to it. 

Recently we have begun a programme of work on similar urethane methacrylate polymers, but have used glass ballotini coupled into the matrix with y-methacryloxypropy 1 (trimethoxy) silane. Values of K Q were measured by double torsion for composites of Vf = 0.4. The results are shown in Figure 9.14. For the urethane methacrylate polymer (containing no soft-block) filled with ballotini of mean particle size 10 pm, Rjc(c)/K c(m) is 2.1, the same... 

Urethane methacrylate polymer (with polyol soft-block)/ 60wt% glass ballotini (10 pm)... 

Deepak VD, Asha SK (2009) Photophysical investigation into the self-organization in pyrene-based urethane methacrylate comb polymer. J Phys Chem B 113 11887-97... 

CAS 868-77-9 EINECS/ELINCS 212-782-2 Uses Crosslinkable paint resin binder for textiles/paper adhesives urethane methacrylates reactive thinners grafting of textile fibers scale inhibitors adhesion promoter for polymers hydrophilic polymers lt.-cuting polymer systems rubber modifiers contact lenses photopolymer plates photoresists... 

Coating Solution coating with MPC polymer wih urethane methacrylate unit on SPU Platelet adhesion [101]... 

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. 

Interest continues in the binding of heparin to polymers in an attempt to produce non-thrombogenic surfaces. This has been the aim in the use of glutaralde-hyde-protein complexes as coatings for latex rubber and polyurethanes. Glutaraldehyde has also been used to bind antibodies to partially hydrolysed polyamide surfaces for enzyme-linked radioassay techniques. One of the few examples of direct polymerization (as opposed to surface modification) in an attempt to produce polymers having improved compatibility involves the use of 2-methacryloyloxyethylphosphoryl choline in the formation of homopolymers and copolymers with methyl methacrylate. An isocyanato-urethane methacrylate has been synthesized from 2-hydroxyethyl methacrylate in connection with dental materials research in which the preparation of poly functional monomers for improvement of interfacial bonding with tooth tissue is a topic of some interest. 

Broer DJ, Mol GN, Challa G (1991) In-situ photopolymerization of oriented liquid-crystalline acrylates, 5. Influence of the alkylene spacer on the properties of the mesogenic monomers and the formation and properties of oriented polymer networks. Makromol Chem 192 59-74 Buruiana T, Melinte V, Costin G, Buruiana EC (2011) Synthesis and properties of liquid crystalline urethane methacrylates for dental composite applications. J Polym Sci A Polym Chem 49 2615-2626... 

The fillers used in the polymer composites are of importance. Within the last year or two, so called microfillers have been introduced into composites. These appear to be fine powders such as "fumed silica" which are embedded in a polymer, said to be based on either the Bis-GMA - or urethane methacrylate-type materials. 

Pentaerythritol is used in self-extinguishing, non dripping, flame-retardant compositions with a variety of polymers, including olefins, vinyl acetate and alcohols, methyl methacrylate, and urethanes. Phosphoms compounds are added to the formulation of these materials. When exposed to fire, a thick foam is produced, forming a fire-resistant barrier (see Elame retardants) (84—86). 

Interpenetrating networks of DMPPO and polymers such as polystyrene, polybutadiene, poly(urethane acrylate), and poly(methyl methacrylate) have been prepared by cross-linking solutions of DMPPO containing bromomethyl groups with ethylenediamine in the presence of the other polymer (68). 

II. B polyethylene glycol, ethylene oxide, polystyrene, diisocyanates (urethanes), polyvinylchloride, chloroprene, THF, diglycolide, dilac-tide, <5-valerolactone, substituted e-caprolactones, 4-vinyl anisole, styrene, methyl methacrylate, and vinyl acetate. In addition to these species, many copolymers have been prepared from oligomers of PCL. In particular, a variety of polyester-urethanes have been synthesized from hydroxy-terminated PCL, some of which have achieved commercial status (9). Graft copolymers with acrylic acid, acrylonitrile, and styrene have been prepared using PCL as the backbone polymer (60). 

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