Results 301 to 310 of about 415,263 (341)

A Polystyrene−Oligothiophene−Polystyrene Triblock Copolymer

Journal of the American Chemical Society, 1998
A well-defined triblock copolymer is synthesized by using a strategy in which the a-coupling of 11 thiophene rings of the middle block and the monodispersity (d.p. = 30 and 1.1) of the two polystyrene outer blocks is ensured. Monofunctional polystyrene is modified with an a-terthiophene unit and two of these units are coupled in a double Stetter ...
Hempenius, M., Langeveld-Voss, B., van Haare, J., Janssen, R., Sheiko, S., Spatz, J., Möller, M., Meijer, E.   +7 more
openaire   +4 more sources

Dielectric properties of polystyrene and polystyrene-chloranil

Thin Solid Films, 1980
Abstract Dielectric permittivities and losses were measured above room temperature in the frequency range 102–105 Hz for undoped and chloranil- (Chl-) doped polystyrene (PS) films (thickness about 15 μm) with progressively increasing Chl concentrations.
Y.K. Kulshrestha, A.P. Srivastava
openaire   +2 more sources

Synthesis and evaluation of polystyrene–polybutadiene–polystyrene–dodecafluoroheptyl methacrylate/polystyrene–polybutadiene–polystyrene hybrid antifouling coating

Journal of Colloid and Interface Science, 2014
Copolymers SBS-DFHMA and mesoporous silica SBA-15 were respectively synthesized and SBS-DFHMA were mixed with SBA-15 to prepared hybrid antifouling coatings by a spin-coater. By measuring the surface water contact angle and the attachment of Pseudomonas fluorescens, Chlorella and Diatoms, the antifouling properties of coatings were evaluated.
Ding Chunhua, Peiqing Wang, Jiang Li, Guoqing Wang, Hong Jiang   +4 more
openaire   +3 more sources

Diffusion of linear polystyrene into crosslinked polystyrene

Polymer, 1997
Abstract The diffusion of linear polystyrene (PS) into its crosslinked counterpart was studied using both neutron reflectivity (NR) and forward recoil scattering (FRES). The penetrant molecular weights were monodisperse and ranged from 10 000 to 690 000 g mol −1 . The molecular weight between crosslinks was kept at 22 000 g mol −1 .
William E. Wallace, Wen-Li Wu, Da-Wei Liu, Barry J. Bauer, Apollo P. Y. Wong, John H. van Zanten   +5 more
openaire   +2 more sources

Photodegradation of polystyrene and polystyrene containing benzophenone

Polymer Photochemistry, 1983
Abstract The photodegradation of polystyrene has been studied by electron spin resonance, infra-red absorption, viscosity and gel fraction measurements. Irradiations with light from a medium pressure mercury lamp to polystyrene film at 45°C in vacuum, gave rise to the polystyryl radical.
Tetsuya Takeuchi, Ayako Torikai, Kenji Fueki   +2 more
openaire   +2 more sources

Immiscibility in polystyrene/sulfonated polystyrene blends

Polymer, 1995
Abstract Miscibility in the binary system of deuterated polystyrene and lightly sulfonated polystyrene has been investigated. Small-angle neutron scattering was used to evaluate the physical state of deuterated polystyrene/polystyrene—1.67% sulfonic acid blends over a wide composition range.
Robert M. Briber, D. G. Peiffer, X. Liu, N.C. Beck Tan   +3 more
openaire   +2 more sources

Vitronectin adsorption on polystyrene and oxidized polystyrene

Journal of Colloid and Interface Science, 1989
Abstract The secondary structure of human plasma vitronectin (VN) contains considerable β and random structure as ascertained by infrared spectroscopy and circular dichroism. VN adsorption kinetics on polystyrene and oxidized polystyrene were monitored by Fourier transform infrared spectroscopy.
William G. Pitt, Stuart L. Cooper, D. J. Fabrizius‐Homan, Deane F. Mosher   +3 more
openaire   +2 more sources

‘Weak links’ in polystyrene

Polymer Degradation and Stability, 1981
Abstract A first step in the thermal degradation of polystyrene prepared by radical polymerisation has been isolated by heating the polymer in the temperature range 199–280°C. In this step a chain scission process occurs without formation of volatile products, involving, on average, about one bond between structural units in every 10 000.
CHIANTORE, Oscar, CAMINO, Giovanni, COSTA, Luigi, N. Grassie   +3 more
openaire   +4 more sources