Base polymer material

Track-etch membranes were developed by the General Electric Corporation Schenectady Laboratory [3], The two-step preparation process is illustrated in Figure 3.4. First, a thin polymer film is irradiated with fission particles from a nuclear reactor or other radiation source. The massive particles pass through the film, breaking polymer chains and leaving behind a sensitized track of damaged polymer molecules. These tracks are much more susceptible to chemical attack than the base polymer material. So when the film is passed through a solution... 

Fig. 1 Band offsets, i.e., relative HOMO/LUMO energies, for two representative type II polymer junctions, i.e., the TFB F8BT and PFB F8BT heterojunctions. Both are fluorene-based polymer materials [26,33]. In this chapter, we focus on the TFB F8BT junction.

Starch has been considered an attractive raw material for polymer applications for almost 200 years. Kirchoff s discovery in 1811 that treatment of starch with an acid yields a sweet substance was an unexpected result of the search for a low-cost substitute for natural rubber.1 Considerable research in the development of starch-based polymer materials has been stimulated by the facts that starch is produced from wide variety of sources, is an annually renewable resource and is inherently biodegradable. 

Polymer Plastics Technology and Engineering 39, No.3, 2000, p.567-650 KINETIC ASPECTS OF AGEING OF POLYVINYL CHLORIDE-BASED POLYMER MATERIALS... 

Structural Characterization of Si-based Polymer Materials by Solid-State NMR Spectroscopy... 

From such a background, the structure and dynamics of Si-based polymer materials by solid-state NMR have been widely used in order to make reliable polymer designs and to develop new advanced polymer materials. Details of the most recent work on structural and dynamic characterization of Si-based polymer materials by solid-state NMR will be reviewed, in addition mention is made of a review on inorganic polymer materials by Takayama. ... 

The volume opens with an account of PISEMA Solid-State NMR Spectroscopy by A. Ramamoorthy, Y. Wei and D.-K. Lee, this is followed by a review of 3D Structure Elucidation Using NMR Chemical Shifts by U. Sternberg, R. Witter and A. S. Ulrich, next comes an account of Se NMR Spectroscopy and Its Applications in Chemistry by H. Duddeck, the following report is on Structural Studies of Polymer Blends by Solid State NMR from H. Kurosu and Q. Chen, finally there is a discussion of the Structural Characterization of Silicon-based Polymer Materials by Solid-State NMR Spectroscopy from S. Kuroki, H. Kimura and I. Ando. 

Latex-based polymer materials can be either nature-made, as natural rubber [Stern, 1967 White, 1995], or synthetically made. The synthetically made latexes are commonly based on recipes of monomer, water, surfactant, and free radical initiator to induce chain polymerization [Lovell and El-Aasser, 1997 Wickson, 1993], However, recipes based on step polymerization are also well known, often resulting in crossUnked films [Walker and Shaffer, 1996], The resulting latex material consists of small particles, usually spherical, of 50-500 nm in diameter, dispersed in water. Alternately, polymers are sometimes emulsified after polymerization (direct emulsification, the product sometimes called artificial latexes) via agitation of a melt in the presence of water and surfactant (emulsifier), and sometimes organic solvent or plasticizer [Piirma, 1989]. 

In addition to solution measurements, several bulk measurements have been made on ferrocene chromophores incorporated into poled polymer films." These measurements have shown that there are no special problems associated with poling ferrocene chromophores. The best bulk performance achieved for a ferrocene-based polymer material was an EO coefficient, of 25pmV (1,300 nm) for a film of 18 incorporated at 20 wt.% into amorphous polycarbonate " this is not, however, competitive with the performance of state-of-the-art all-organic poled polymer systems. In some cases, the chromophores have been covalently linked to the polymer chain. Bulk SHG measurements have also been made on self-assembled Langmuir-Blodgett films incorporating ionic ferrocene-based chro-... 

Latex-based polymer materials can be either nature made, as natural rubber (Stem 1967 White 1995), or synthetically made. The synthetically made latexes are... 

This process may be advantageous for the functionalization of cell surfaces because the synthetic polymers are immobilized at the topmost surfaces of the cells. In addition, the methacryloyl group is the most desirable group for polymer synthesis and should be effective for the preparation of cell-based polymer materials. 

Kuroki, S., Kimura, H., and Ando, I. 2004. Structural characterization of Si-based polymer materials by solid-state NMR spectroscopy. Ann. Rep. NMR Spectrosc. 52 201-243. 

After surface preparation, the restorative material is bonded to the tooth structure with auto-polymerizing adhesive resin. One prerequisite for dental adhesives is an ability to cure in the mouth that is why methaciylate-based polymer materials are used in dentistry. Initiation systems are BPO-f amine or TBB (201). Monomers used are MMA or bifunctional methacrylate monomers. The needed optical opacity (215,216) is achieved by various inorganic and metal compoimds incorporated into the formulations. 

R 24 S. Kuroki, H. Kimura and I. Ando, Structural Characterization of Si-Based Polymer Materials by Solid-State NMR Spectroscopy , p. 201 Vol. 53, 2004... 

In this chapter, materials for fabricating POFs, especially their cores, are discussed. Section 4.1 describes the properties and problems of typical base polymer materials, namely poly(methyl methacrylate) (PMMA) and CYTOP . In Sections 4.2 and 4.3, recent material developments that have been attempted to solve the difficulties of conventional polymers are detailed. 

Sustainable development of carbon based polymer materials... 

Zhang, X. (2014). Chemical approaches in processing wheat gluten-based polymer materials. Aust / Chem., 67(1), 6-10. doi 10.1071/CH13328. 

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