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Tetraethylorthosilicate (TEOS), titanium isopropoxide (TIP), and poly [t-butylstyrene -b- ethylene -alt- propylene -b- sulfonated styrene -b- ethylene -alt- propylene -b- t-butylstyrene] or Pentablock Copolymer (PBC) were used to create a series of nanocomposite inorganic-organic materials. Sol-gel chemistry provided a route to maximize the interactions between an inorganic network and organic polymer...
Radiation cross-linking and re-melting extensively used to decrease the wear of ultrahigh molecular weight polyethylene (UHMWPE) deteriorated the mechanical performance undesirably. This study aimed at simultaneously enhancing wear resistance and mechanical performance of UHMWPE bearings by cross-linking of the UHMPWE before melt processing followed by structural manipulation. Wear rate decreased...
Two new donor–acceptor type of conjugated polymers derived from naphtho[1,2-c:5,6-c]bis(2-octyl-[1,2,3]triazole) and dithieno[3,2-b:2′,3′-d]silole were prepared by Stille polymerization. The thermal, electrochemical and photophysical properties of these copolymers were studied. Both polymers have excellent thermal stability with decomposition temperature up to 430 °C. The copolymers show medium band...
A series of new acceptor-pended conjugated polymers P27CZSDCN, P27CZSDTA, P36CZSDCN and P36CZSDTA, which are composed of carbazole and triphenylamine alternatingly arranged main chain, electron-withdrawing pendant groups (malononitrile and 1,3-diethyl-2-thiobarbituric acid) and thiophene π-bridge, are designed and synthesized. Both 2,7-carbazole and 3,6-carbazole are used as the building blocks to...
Two novel conjugated alternating copolymers with [1,2,5]thiadiazolo[3,4-f]benzotriazole as acceptor and 9,9-dioctylfluorene or N-9’-heptadecanyl-carbazole as donors respectively, were synthesized by Suzuki polycondensation. Both of the two copolymers have nearly ideal band gaps and show excellent absorption spectra in near infrared region. Polymer solar cells based on the blends of them and [6,6]-phenyl-C...
A new anionic water-soluble polyfluorene—poly(9,9-bis(4′-sulfonatobutyl)fluorene-co-alt-1,4-phenylene) sodium salt (PFS) was synthesized by Suzuki-coupling reaction. The anionic polyfluorene shows bright blue photoluminescence and it was found the photoluminescence could be highly quenched by a bioactive dye (Lucifer yellow cadaverine biotin-X dipotassium salt). PFS photoluminescence quenching only...
A novel series of soluble conjugated random and alternating copolymers derived from 9,9-dioctylfluorene (FO) and 1,1-dimethyl-2,3,4,5-tetraphenylsilole (PSP) were synthesized by Suzuki coupling reactions. The feed ratios of FO to PSP were 95:5, 90:10, 85:15, 70:30, and 50:50. Chemical structures and optoelectronic properties of the copolymers were characterized by elemental analysis, NMR, UV absorption,...
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