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To reveal the influence of graphene oxide (GO) on the mechanical properties of natural rubber (NR) crosslinked by different vulcanization systems, synchrotron radiation wide angle X-ray diffraction (WAXD) experiments were conducted to investigate the strain-induced crystallization (SIC) behaviors of the NR/GO nanocomposites. We found that the sulfur/accelerator (S/A) ratio in the vulcanization recipes...
Interfacial interaction is of crucial importance for polymer nanocomposites. To improve interfacial interaction between graphene (GE) and isoprene rubber (IR), we grafted a silane coupling reagent, (bis-[γ-(triethoxysilyl) propyl]-etrasulfide), onto graphene oxide (GO). The modified GO was mixed with IR by solution blending and then reduced in situ to prepare IR/surface modified GE nanocomposites...
By an oxidative coupling polymerization approach, we have synthesized an electroactive polymer with good solubility containing alternating phenyl-capped aniline pentamer in the main chain and azo chromophores in the side chain. In this study, we present reversible example of photochemically induced switching of electroactivity by performing electrochemical CV in two ways: (i) in that the photochemical...
This article details electrochemical investigations of carbon paste electrode (CPE) modified with electroactive polyimide (EPI) as ascorbic acid sensor (vitamin C, AA). EPI, with aniline-pentamer-based in the main chain, was synthesized from oligoaniline and p-phenylenediamine by oxidative coupling polymerization. The well-defined molecular structure of the oligoaniline and EPI was confirmed by LC-Mass,...
In this study, preparation and electrochemical corrosion protection studies of a series of polyimide–Clay nanocomposite (PCN) materials were first presented. Subsequently, the as-prepared PCN materials were characterized by FTIR, XRD and TEM studies. In-situ monitoring for redox behavior of as-prepared PCN materials was identified by UV–visible and CV studies.It should be noted that PCN coating was...
The polymerization of diphenylacetylene derivatives possessing tert-amine moieties, such as triphenylamine, N-substituted carbazole and indole, was examined in the presence of TaCl 5 –n-Bu 4 Sn (1:2) catalyst. A polymer with high molecular weight (M w =570×10 3 ) was obtained in good yield by the polymerization of diphenylamine-containing monomer 1b, whereas the isopropylphenylamine...
The molecular architecture effect on active structure of miscellaneous polynorbornenes (Scheme 1) was investigated with pendant α,β-unsaturated amide or ester groups via ring-opening metathesis polymerization (ROMP). Remarkable differences in the reactivity and polymerization behavior of active norbornenes depend on various molecular architectures. Polynorbornenes derived from active norbornenes with...
Novel organosoluble fluorescent polynorbornenes with multi-functional armed structure were designed and prepared by using highly stable block macroinitiators via a combination of living ring-opening metathesis polymerization (ROMP) and atom transfer radical polymerization (ATRP). A bromo-containing functional norbornene (NBMBr) was prepared from the Diels–Alder reaction of cyclopentadiene and allyl...
A new diamine monomer containing noncoplanar methyl substitution, 2,2′-dimethyl-4,4′-bis(2-trifluoromethyl-4-aminophenoxy)biphenyl (DBTFAPB) was successfully synthesized and used in the preparation of a series of polyamides and polyimides by direct polycondensation with various aromatic dicarboxylic acids and tertacarboxylic dianhydrides. A new noncoplanar dicarboxylic acid monomer containing noncoplanar...
A novel series of nonlinear optical (NLO) polysiloxanes with a high density of chromophore moieties based on poly{methyl-[3-(9-indolyl)propyl]siloxane} (PMIPS) were synthesized by a post functional strategy. First, PMIPS (P1) was prepared through hydrosilylation reaction, then P1 is partially formylated by the reaction between P1 and the reagents of dimethylformamide (DMF) and phosphorus oxychloride...
This study describes the effect of salt on the aqueous solution property of the anionic terpolymer (SPM/NIPAM/PyMMA) of potassium-2-sulfopropylmethacrylate (SPM), N-isopropylacrylamide (NIPAM), and 1-pyrenemethylmethacrylate (PyMMA) in terms of fluorescence and dynamic light scattering. A plot of the thermally induced changes in I 1 /I 3 and I E /I M ratios for pyrene-labeled...
Ring-opening metathesis polymerization (ROMP) has been performed with {RuCl 2 (CHPh)[P(C 6 H 11 ) 3 ] 2 } catalyst to make low polydispersity block copolymers of 5-(N-carbazoyl methyl)bicyclo[2.2.1]hept-2-ene (CbzNB) and 5-(phthalimide methyl)bicyclo[2.2.1]hept-2-ene (NBMPI). Three diblock copolymers with the CbzNB and NBMPI were made, varying both molecular...
A novel yellow-green light-emitting rigid-rod copolymer, poly[(2,5-bis(triethoxy)-1,4-phenylenevinylene)-alt-(1,4-phenylenevinylene)] (BTEOPPV-alt-PPV) with an alternating structure containing oligo(ethylene oxide) side chains was synthesized by the Wittig reaction of the corresponding triphenylphosphonium chloride and dialdehyde compounds. This soluble and processable copolymer with both electronic...
Copolymers of cationic trimethyl(4-methacrylamidophenyl)ammonium methyl sulfate (TMMAPhAMS) or zwitterionic 3-dimethyl(4-methacrylamidophenyl)ammonato propane sulfonate (DMMAPhAPS) monomer with methacrylamide (MAA) have been prepared by free radical polymerization using 4,4′-azobis-cyanovaleric acid as an initiator in aqueous solution. Copolymer compositions were obtained by elemental analysis. The...
The relationship between the structure and property of polyurethane elastomer derived from bisphenol-S derivatives/diisocyanate system was studied. The effects of the amount of soft segment of diol, including ester and ether, as well as the effects of structure of diisocyanate on the mechanical properties of elastomer were discussed on the basis of the results obtained from the hardness, tensile...
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