Styrene polymer with

Aromatic electrophilic substitution is used commercially to produce styrene polymers with ion-exchange properties by the incorporation of sulfonic acid or quaternary ammonium groups [Brydson, 1999 Lucas et al., 1980 Miller et al., 1963]. Crosslinked styrene-divinyl-benzene copolymers are used as the starting polymer to obtain insoluble final products, usually in the form of beads and also membranes. The use of polystyrene itself would yield soluble ion-exchange products. An anion-exchange product is obtained by chloromethylation followed by reaction with a tertiary amine (Eq. 9-38) while sulfonation yields a cation-exchange product (Eq. 9-39) ... 

Since ABS is composed of a hard material and a soft material, it combines the rigidity of acrylonitrile and styrene polymers with the toughness of butadiene rubbers. Most advantageous is its impact resistance and toughness. ABS can be tailored to improve the impact resistance, toughness, and heat resistance. Selected properties of an ABS type are shown in Table 8.8. 

The resins studied (Rohm and Haas and Ionac) were all functionalized, cross-linked, styrene polymers with the exception of poly (4-vinyl-pyridine). Porous, macroreticular resins included the polymeric analogs of N,2V-dimethylbenzylamine (A21 polyDMBA, Rohm and Haas), N,N-dimethylaniline, and l-phenyl-2- (N,2V-dimethylamino) ethane (poly-Alipham), The last two materials were prepared in this laboratory. Nitrogen content of the porous resins was 4.1, 2.5, and 2.6 mequiv/gram, respectively. Poly(4-vinylpyridine) (6.9 mequiv/gram) had a gel-type structure. 

Figure 1.12 shows the timeline of discovery of various styrenic polymers and copolymers. It would be naive to suggest that the rate of invention and innovation will level off in this century. Rather, the pace of discovery of new styrenic polymers will probably increase. Advances in new catalyst technology and controlled radical polymerisation technology will undoubtedly yield new styrenic polymers with well-defined architecture, as we have recently seen with the introduction of syndiotactic PS and ethylene-styrene interpolymers. 

Table 19.2 Notched impact strength (ak) of styrene polymers with 35% Kraton G 1651 under different processing procedures (Inj.m. = injection moulded)...

STYRENE-BUTADIENE COPOLYMER see SMROOO STYRENE-1,3-BUTADIENE COPOLYMER see SMROOO STYRENE-BUTADIENE POLYMER see SMROOO STYRENE EPOXIDE see EBROOO STYRENE MONOMER (ACGIH) see SMQOOO STYRENE MONOMER, inhibited (DOT) see SMQOOO STYRENE OXIDE see EBROOO STYR NE-7,8-OXIDE see EBROOO STYRENE POLYMER see SMQSOO STYRENE POLYMER with 1,3-BUTADIENE see SMROOO... 

Styrene polymers, with ease of processing and well-established impact modification, balance the refractory nature of PPO resins. 

FIGURE 27. Modified Arrhenius plots of nn I against inverse temperature for styrene polymers with small emitting co-monomers, where Ip is phosphorescence intensity. Transitions corresponding to Ty and various sub-group motions are visible [after figure in Macromolecules, 7, 233 (1974)]. 

In a very elegant approach, Okamura et al. attached Cgo to a range of styrene polymers with different molecular weights (from 1000 to 10,000) [32]. The attachment was provided by 1,4-radical addition to Cgg, producing narrow-dispersity polystyryl adducts (Scheme 3). The electrochemical and ground state absorption properties of the polymers were identical to those of a low-mass, fully characterized model (Scheme 3). This indicates that the reported procedure is useful for the preparation of high-mass polymers, with retained fullerene properties. 

NMR of TCA-Styrene polymer with different mole ratios, (33 mole percentage of TCA), TCST2 r (41 mole percentage a TCST. (57 mole percentage of TCA) are shown in Fig,6. 

Zhang, X. Yoon, S.C. Lim, J.G. Lee, Y.S. Supported catalyst for producing syndiotactic styrenic polymer with high productivity and significantly reduced reactor fouling, U.S. Patent 6,828,270, December 7, 2004. 

Adhesion promoters include the substances that create close physical and/or chemical bonds between two substrates [108]. The substrates to be cormected are fibrous reinforcing or particulate fillers on the one hand and plastics or metals on the other. The adhesion promoters always form bridges between the interfaces of the two components. For example, adhesion promoter resins based on styrene/butadiene alloys serve as adhesive layers for laminating panels and coextrusion of foils made of styrene polymers with polyolefins, PC, PMMA, and PA [30]. 

Synonyms Benzene, ethenyi-, polymer with 1,3-butadiene B/S Butadi-ene/styrene copolymer 1,3-Butadiene/styrene copolymer Butadiene/ styrene polymer 1,3-Butadiene/styrene polymer Butadiene/styrene resin 1,3-Butadiene/styrene resin Butadiene/styrene rubber Ethenylbenzene polymer with 1,3-butadiene Polybutadiene/polysty-rene copolymer Poly (styrene-co-butadiene) S/B SBR Styrene/butadiene Styrene/butadiene copolymer Styrene/1,3-butadiene copolymer Styrene polymer with 1,3 butadiene Classification Polymer synthetic rubber Formula pCH2CH(C6H5)],(CH2CH=CHCH2),... 

Styrene polymer with 1,3 butadiene. See Styrene/butadiene polymer Styrene, polymerized. See Polystyrene... 

Styrene-7,8-oxide. See Styrene oxide Styrene polymer. See Polystyrene Styrene polymer with 1,3 butadiene. See Styrene/butadiene polymer Styrene, polymerized. See Polystyrene Styrene/PVP copolymer CAS 25086-29-7... 

Kawatsuki et al. [186] synthesized styrene polymers with pendant norbomadiene groups attached... 

Polystyrene is a transparent, colorless thermoplastic resin available in solvent-solution or aqueous-emulsion form. In both forms, appUcations are limited to conditions where at least one of the adherends is porous. An example is sticking polystyrene tiles onto a plaster wall. Polystyrene adheres well to wood, but not to plastics, except itself. For bonding polystyrene, a low-molecular-weight styrene polymer with a peroxide catalyst is used. This adhesive polymerizes in the glue Une. ° ... 

MABS is similar to ABS except for the addition of an additional monomer, usually methyl methacrylate. MABS is an amorphous, clear, transparent material with thermal and mechanical properties like ABS. The transparency is achieved by matching the refractive indices of the matrix resin (the transparent acrylate—acrylonitrile—styrene polymer) with the polybutadiene rubber impact modifier. MABS has the highest impact resistance of all the styrenic plastics. Sometimes called transparent... 

Polymer Supports. A cross-linked styrene polymer with pendant phosphine groups has been used to support Rh (3.7 wt.%) in an entirely vapor-phase system at 100°C and 1 atm pressure (17). Carbonylation required the presence of... 

Fig. 5 Cloud point curves for blends of styrenic polymers with tetramethyl bisphenol-A polycarbonate.

Deprotection of the t-Boc groups is achieved by reaction with an acid, HX (Scheme 13.6). The acid is generated from photochemical decomposition of iod-onium (R2r X ) or sulfonium (R3S X ) [17]. Deprotection of the t-Boc groups results in the formation of a styrene polymer with soluble phenolic side-chain groups. Thus the photoinduced creation of a soluble polymer from an insoluble one constitutes a positive chemically amplified photoresist. 

The advantage of ABS is that it combines the strength and rigidity of the acrylonitrile and styrene polymers with the toughness of the polybutadiene rubber. The most remarkable mechanical properties of ABS are resistance and toughness. A variety of modifications can be made to improve... 

---