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Distribution of nanoparticles in nanocomposites is one of the most important roles to design unique morphologies and properties; however, up to now, it is still very difficult to control distribution of nanoparticles in polymer matrix. Here we show a simple approach to fabricate ferroferric oxide (Fe3O4) nanoparticles with controllable chain-like distribution in poly(ε-caprolactone) (PCL) by a magnetic...
In order to obtain high-temperature resistant thermoplastic elastomers (TPEs), we designed and synthesized a new kind of ABA triblock copolymer containing a mesogen-jacketed liquid crystalline polymer, poly(4′-(methoxy)-2-vinylbiphenyl-4-methyl ether) (PMVBP), as the hard blocks and polybutadiene (PB) as the soft block. PB was synthesized by ring-opening metathesis polymerization in the presence of...
Titanium dioxide (TiO2) nano-rod thin film was successfully synthesized via hydrothermal method on fluorine doped tinoxide (FTO) coated transparent conductive glass substrate. Then, three donor-acceptor polymers based on 2, 1, 3-benzothiadiazole or perylenediimide have been electropolymerized on TiO2 nano-film to form organic-inorganic hybrid films. XRD, FTIR and SEM characterizations confirm the...
TBD catalyzed continuous flow ring-opening polymerizations of ε-caprolactone and δ-valerolactone were exemplified as the model investigation system of organocatalytic synthesis of polyesters in the simple PTFE tubular microreactor (MR). In contrast to the batch reactor (BR), significant benefits of utilizing continuous flow strategy were achieved including higher level control of molecular weights...
In this work, poly(l-lactic acid) (PLLA) ultrafine fibers with different morphology and structure were fabricated by a novel linear-jet electrospinning method which relies on a conventional electrospinning set-up with continuous rotating drum. To control the morphology and structure of PLLA electrospun fibers, different solution systems and electrospinning conditions were investigated. Two PLLA solution...
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...
The crystalline morphologies of high-density polyethylene (HDPE) molded by multi-melt multi-injection molding (MMMIM) and conventional injection molding (CIM) were studied by employing polarizing light microscopy (PLM) and scanning electronic microscopy (SEM). It was found that a special double skin-core structure was formed in MMMIM parts. Namely cylindritic structures appeared in both sub-skin layer...
Synthesis and spectroscopic characterisation of cellulose sulfate (CS) were reported. Various CS exhibiting diverse degrees of sulfation (DS S ) were prepared through acetosulfation or direct sulfation of cellulose. During the acetosulfation, intermediate product – cellulose acetate sulfate (CAS) – was formed after the comparative esterification and subsequent deacetylation of CAS led to CS...
A series of 2,3,5,6-tetra-substituted pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione (DPP) derivatives carrying thienyl-, 3,4-ethylenedioxy-thienyl- (EDOT-) and 3,4-ethylenedithiathienyl- (EDTT-) substituent groups have been synthesized and electrochemically polymerized. The polymers were investigated using UV/vis absorption spectroscopy and cyclic voltammetry. It was found that the growth of the polymers...
Chitosan sulfates (CHS) were prepared with chlorosulfonic acid homogeneously and non-homogeneously. The total degrees of substitution (DS) ascribed to sulfate groups (DS S ) were determined with elemental analysis and the partial DS at 6-O-position was estimated via 13 C NMR. CHS with diverse total DS S and sulfation patterns were obtained according to the analysis. The effects...
Continuous polymer nanofiber yarns were manufactured by self-bundling electrospinning method. Compared with typical electrospinning setup, the special difference in this method was that a grounded needle tip was used to induce the self-bundling of polymer nanofibers at the beginning of electrospinning process. Four kinds of polymer self-bundling yarns, poly(3-hydroxybutyrate-co-3-hydroxyvalerate)...
Monodisperse cross-linked polymer microspheres with carboxyl groups on their surface were prepared by means of emulsifier-free emulsion copolymerization. The characterizations by X-ray photoelectron spectroscopy and conductometric titration indicate that most carboxyl groups are located on the surface of microspheres. Their swelling degree or cross-linking degree has been investigated by an in situ...
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