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A series of organic-inorganic polybenzoxazine (PBZ) copolymers with double deck silsesquioxane (DDSQ) in the main chains were synthesized via Mannich polycondensation. First, 3,13-dianilino DDSQ, a well-defined polyhedral oligomeric silsesquioxane (POSS) diamine was synthesized. Thereafter, this POSS diamine together with 4,4-diaminodiphenylmethane was utilized to react with 4,4’-dihydroxyldiphenylisopropane...
We demonstrated the crystallization assisted microphase separation of all-conjugated diblock copolymers poly (2,5-dihexyloxy-p-phenylene)-block-(3-hexylthiophene) (PPP-b-P3HT, denoted as BmTn). The crystallization and microphase separation are summarized in terms of the difference of aggregation in solvent and the crystallization temperatures of two blocks, respectively. B39T18 and B41T44 were selected,...
Polyelectrolytes composed of an anionic sulfoethyl methacrylate/methacrylate backbone and cationic cyanine dyes counter ions are synthesized. The effective reaction sequence is confirmed by NMR spectroscopy and consists of a thermal radical copolymerization to obtain the polymer backbone (M n ∼ 40 kg mol −1 ), followed by deprotonation of the sulfoethyl group and a salt metathesis...
An alkylated skeleton of indeno[2,1-c]fluorene, viewed as a positional isomerism of indeno[1,2-b]fluorene, was developed to construct several conjugated oligomers and polymers through a Pd-catalyzed Suzuki coupling reaction for organic light-emitting diodes. Single crystal analysis indicated that the structure of indeno[2,1-c]fluorene was twisted due to close H---H contacts in the crowded region of...
Reversibly light-responsive and biocompatible micelles with an appropriate size were constructed from an amphiphilic spiropyran-containing hyperbranched polyphosphate (denoted as HPHEEP-SP). The polymer was conveniently synthesized based on the modification of a biodegradable hyperbranched polyphosphate with carboxyl-containing spiropyran molecules. HPHEEP-SP can self-assemble to biocompatible micelles...
Poly(N-isopropylacrylamide)-block-poly(N-vinylpyrrolidone) diblock copolymer (PNIPAAm-b-PVPy) was successfully synthesized via sequential reversible addition-fragmentation chain transfer/macromolecular design via the interchange of xanthate (RAFT/MADIX) process, in which the chain transfer agent of xanthate was in situ afforded via the reaction of isopropylxanthic disulfide (DIP) with 2,2-azobisisobutylnitrile...
A photosensitive capsule consisting of aluminum phthalocyanine tetrasulfonate chloride (AlPcS 4 Cl) and polyelectrolytes was fabricated by assembling of oppositely charged poly(allylamine hydrochloride) (PAH) and AlPcS 4 Cl onto the preformed capsules composed of poly(styrene sulfonate) (PSS) and PAH. UV–visible absorption spectra, EDX spectrum and AFM images confirmed the successful...
In this work, we investigated the self-assembly behavior of poly(ɛ-caprolactone)-block-poly(ethylene-co-ethylethylene)-block-poly(ɛ-caprolactone) (PCL-b-PEEE-b-PCL) triblock copolymer in epoxy thermosets. The PCL-b-PEEE-b-PCL triblock copolymer was synthesized via the ring-opening polymerization of ɛ-caprolactone with a hydroxyl-terminated poly(ethylene-co-ethylethylene) as the macromolecular initiator...
Solution polymerized styrene-butadiene rubber (SSBR) and SSBR with tert-Butylchlorodiphenylsilane (TBCSi, large-volume functional groups) at the two ends of macromolecular chains (T-SSBR) were prepared by anionic polymerization. The molecular structure parameters of T-SSBR and SSBR were characterized and the ratio of the amount of macromolecular chain ends connected with TBCSi to total macromolecular...
The main-chain polybenzoxazine-block-polydimethylsiloxane multiblock copolymers were synthesized via the Mannich polycondensation among 4,4′-dihydroxyldiphenylisopropane, 4,4′-diaminodiphenylmethane, aminopropyl-terminated polydimethylsiloxane and paraformaldehyde. The multiblock copolymers were characterized by means of Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectroscopy...
The re-assembly behaviors of spherical micelles of the polystyrene-b-poly(acrylic acid) (PS-b-PAA) diblock copolymer in different solvent mixtures were investigated using dynamic light scattering, transmission electron microscopy and atomic force microscopy. Depending on the nature of the solvent, PS-b-PAA micelles re-assembled from spheres to nanorings in toluene or to necklace-like aggregates in...
How can the degree of branching influence the lyotropic properties of amphiphilic block copolymers? In order to provide a qualitative answer to this question, we have prepared a library of poly(propylene sulfide)-bl-poly(ethylene glycol) (PPS–PEG) block copolymers, varying the hydrophobic block (PPS) length and its branching degree and thus producing diblock, triblock (that can be seen as two-armed...
The organic–inorganic amphiphile, hepta(3,3,3-trifluoropropyl) polyhedral oligomeric silsesquioxane (POSS)-capped poly(ɛ-caprolactone) (POSS-capped PCL) was synthesized via the ring-opening reaction of ɛ-caprolactone, which was initiated by 3-hydroxypropylhepta(3,3,3-trifluoropropyl) polyhedral oligomeric silsesquioxane (POSS) with stannous (II) octanoate [Sn(Oct) 2 ] as the catalyst. The...
Mannich condensation was utilized to synthesize poly(hydroxyether of bisphenol A)-block-polydimethylsiloxane alternating block copolymer (PH-alt-PDMS). The polymerization between the phenolic hydroxyl-terminated oligo(hydroxyether of bisphenol A) and amino-terminated oligodimethylsiloxane with the defined lengths was carried out via the formation of benzoxazine ring linkages, which was mediated with...
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