Polystyrene i-poly

Investigations were mainly devoted to the synthesis of telechelic polymers and copolymers rather than to living radical polymerization. In particular, from 1960, Imoto et al. [234] started surveys on the synthesis of block copolymers from this method. Thus, polystyrene-i>-poly(vinyl alcohol) diblock copolymer... 

The pendant phosphino groups of polystyrene-i)-poly(vinyltriphenylphosphine) (PS-b-PVTPP) have also been used to coordinate Pd salts [103]. Complex aggregation phenomena were observed in solution due to the possibility of intermolecular cross-linking reactions, and reduction with hydrazine or other reductants was shown to yield Pd nanoparticles. 

Figure 10.3. Drawing of the final product, a polystyrene-i-poly(vinylperfluorooctanic ester) (p n- 10%)...

SHI Shinde, V.S., Girme, M.R., and Pawar, V.U., Thermoresponsive polystyrene-i-poly(V-isopropylacrylamide) copolymers by atom transfer radical polymerization,... 

The effect of molecular weight of atactic polystyrene-i -poly(ethylene-co-butylene)-b-atactic polystyrene triblock copolymers on the morphology, impact strength, and... 

Sulfonated polystyrene -I- poly(vinyl Cation exchange membranes 158... 

The difunctional derivative DIAMA has also been used in emulsion polymerization (Figure 17) 30,231 enabling a significant reduction in particle size and narrower distribution compared to latexes prepared using monoflinctional BlocBuilder MA . Polystyrene-I -poly(n-butyl acrylate)-Zi-polystyrene triblock copolymers were made using the difunctional alkoxyamine, and allowed nanostmctured particles to be formed upon internal phase separation. A refined semibatch process shortened overall process time compared to earlier efforts. ... 

Property Polystyrene (PS) Poly(styrene-i) (j-acrjio-nitrile ) (SAN) Glass-fil led PS High impact PS HIPS Acrylonitrile— butadiene—styrene terpolymer (ABS) Type 1 Type 2 Standard ABS Super ABS... 

Kim, J., Kim, B., Jung, B., Kang, Y. S., Ha, H. Y, Oh, I. H. and Ihn, K. J. 2002. Effect of casting solvent on morphology and physical properties of partially sulfonated polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene copolymers. Macromolecular Rapid Communication 23 753-756. 

E7 polystyrene-Z)/oc - silanetetraylbis[-gra/i-poly(buta-1,3-diene)] -block-polystyrene, or poly(buta-l,3-diene)-Z)/oc -[silanetetraylbis(-gra/ polystyrene)]-Z)/ocyi -poly(buta-l,3-diene)... 

Osaki, K., SchragJ.L. Viscoelastic properties of polymer solutions in high-viscosity solvents and limiting high-frequency behavior. I. Polystyrene and poly(a-methyl-styrene). Polymer J. (Japan) 2,541-549 (1971). 

The living character of organolithium polymerizations makes such processes ideally suited for the preparation of pure as well as tapered-block copolymers. Diene-olefin pure-block copolymers have become important commodities because of their unique structure-property relationships. When such copolymers have an ABA or (AB) X [A = polyolefin, e.g., polystyrene or poly(a-methylstyrene) B = polydiene, e.g., polybutadiene or polyisoprene and X = coupling-agent residue] arrangement of the blocks, the copolymers have found use as thermoplastic elastomers (i.e., elastomers that can be processed as thermoplastics). 

So far, there have been only few reports about the synthesis of amphipolar polymer brushes, i.e. with amphiphilic block copolymer side chains. Gna-nou et al. [115] first reported the ROMP of norbornenoyl-endfunctionalized polystyrene-f -poly(ethylene oxide) macromonomers. Due to the low degree of polymerization, the polymacromonomer adopted a star-like rather than a cylindrical shape. Schmidt et al. [123] synthesized amphipolar cylindrical brushes with poly(2-vinylpyridine)-block-polystyrene side chains via radical polymerization of the corresponding block macromonomer. A similar polymer brush with poly(a-methylstyrene)-Wocfc-poly(2-vinylpyridine) side chains was also synthesized by Ishizu et al. via radical polymerization [124]. Using the grafting from approach, Muller et al. [121, 125] synthesized... 

ABC copolymers polystyrene-polyisoprene-poly(vinyl-2-pyridine)(S.I.V2P) with number-molecular average weight of 23000,102000, and 23000 were prepared by stepwise anionic polymerization. Films obtained by solvent casting from methylcyclohexane and benzene were observed by electron microscopy after staining the polyisoprene block with osmium tetroxide or the poly(vinyl-2-pyridine)... 

After having studied in our laboratory, polymer blends of amorphous polymers poly-c-caprolactone and poly (vinyl chloride) (1,2) (PCL/ PVC), blends with a crystalline component PCL/PVC (3,4), poly(2,6-dimethyl phenylene oxide) (PPO) with isotactic polystyrene (i-PS) (5) and atactic polystyrene (a-PS) with i-PS (6), we have now become involved in the study of a blend in which both polymers crystallize. The system chosen is the poly(1,4-butylene terephthalate)/poly(ethylene terephthalate) (PBT/PET) blend. The crystallization behavior of PBT has been studied extensively in our laboratory (7,8) this polymer has a... 

Since the initial work of Smidsrod and Guillet numerous investigators have used I.G.C. to determine physicochemical parameters characterising the interaction of small amounts of volatile solutes with polymers Baranyi has shown that infinite dilution weight fraction activity coefficients, interaction parameters and excess partial molar heats of mixing can be readily determined with this technique. Partial molar heats and free energies of mixing, and solubility parameters of a wide variety of hydrocarbons in polystyrene and poly(methyl methacrylete) have been determined The temperature dependence of the interaction parameter between two polymers has also been studied... 

I proceed by first describing in Sec. II the construction of a molecular-orbital model suitable for interpreting molecular FES and UVA spectra. Then, this model is extended to encompass intramolecular (Sec. Ill) and intermolecular (Sec. IV) relaxation. The paper concludes with an indication of the applications of the model to interpret FES and UVA from polyacetylene (11) and from two pendant-group polymers, polystyrene and poly(2-vinyl pyridine) (9, 10). 

Fig. 8 Illustration of a (3.4.6.4) Archimedian tiling self-assembled structure of a 2 1 blend of poly(2-vinylpyridine)-l>Zocfc-polyisoprene-l)Zocfc-poly(2-vinylpyridine) and polystyrene-fcZocfc-poly(4-hydroxystyrene). P denotes poly(2-vinylpyridine), H denotes poly(4-hydroxystyrene), S denotes polystyrene and I denotes polyisoprene. Reprinted with permission from [45]. 2006 American Chemical Society...

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