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A series of multi-crosslinkable, self-healing, ladder-structured polysilsesquioxane inorganic-organic hybrid materials were developed to enhance the mechanical properties through tandem UV-curing and Diels-Alder chemistry. The introduction of UV-curable acryl- or epoxy groups allowed for a higher degree of crosslink density while bringing the inorganic backbones closer together for highly efficient...
A multifunctional crosslinkable and ionic-group functionalized ladder-like polysilsesquioxane was synthesized and utilized for the fabrication of hybrid ionogels for lithium ion batteries. The ionic-group functionalized ladder-like polysilsesquioxane combined the synergistic effects of hybrid materials in improving the thermal stability of conventional battery electrolytes, whilst maintain facile...
An in-depth examination of the self-healing properties of both dienophile and diene functionalized ladder-like structured polysilsesquioxane copolymers and terpolymers was investigated. Through functionalization of both diene and dienophile on the double-stranded siloxane backbone with ternary n-alkyl functional groups acting as chain mobility control, the effect of chain mobility and chemical structure...
Compatible hybrid composites (PVLPMA) comprising of poly(vinylidene fluoride) (PVDF) and UV-curable ladder-like polysilsesquioxane (LPMASQ) were investigated for maximizing synergetic effects in various properties. The PVDF fluoropolymer was found to be well-incorporated with the LPMASQ inorganic filler because of good hydrogen-bonding, and the compatibility rigorously investigated by FT-IR, DSC,...
A series of thiol-ene UV-curable inorganic–organic hybrid polysilsesquioxanes of various phenyl:methacryloxypropyl and phenyl:mercaptopropyl copolymer compositions were synthesized in one-batch using a base-catalyzed system. These thermoplastic photocurable ladder-like structured materials were examined as scratch-resistant, hard-coating materials on both glass and PET substrates. The unique fully...
Poly(3-hexyl thiophene) (P3HT) is widely studied as a model material in many electrical and photovoltaic applications, and has become the benchmark polymer when studying the physics of these devices. Despite its extensive use, its precise crystalline structure and thermodynamic characteristics, such as its enthalpy of melting of an ideal crystal, crystalline density, and amorphous density, are not...
The field of bone and cartilage tissue engineering has a pressing need for novel, biocompatible, biodegradable biocomposites comprising polymers with bioceramics or bioglasses to meet numerous requirements for these applications. We created hydrolytically degradable hydrogel/bioceramic biocomposites, comprising poly(2-hydroxyethyl methacrylate) (pHEMA) hydrogels and 50 wt% biphasic hydroxyapatite/β-tricalcium...
The formation of nanoparticles and the mechanism of their formation in a blend of a thermotropic liquid crystalline polyester (LCP) and the zinc salt of a lightly sulfonated polystyrene ionomer (Zn-SPS) were investigated using Fourier transform infrared (FTIR), thermogravimetric analysis (TGA), and gas chromatography–mass spectroscopy (GC–MS). Transmission electron microscopy (TEM) and wide-angle...
A nano-composite was produced by simply melt mixing a blend of a thermotropic liquid crystalline polyester (LCP) and the zinc salt of a lightly sulfonated polystyrene ionomer at 300°C. The nano-particles, which were in the form of relatively uniform rectangular prisms of ca. 30nm×30nm×200nm, formed from the LCP phase due to an ester-interchange reaction between the LCP and residual catalytic amounts...
A series of 1,9-bis[glycidyloxypropyl]pentasiloxanes (IV-VI) were prepared by the platinum catalyzed hydrosilylation of 1,9-dihydridodecamethylpentasiloxane (I), 1,9-dihydrido-3,5,7-tris(3',3',3'-trifluoropropyl)heptamethylpentasiloxane (II), and 1,9-dihydrido-3,5,7-tris(1'H,1'H,2'H,2'H-perfluorooctyl)heptamethylpentasilo xane (III) with allyl glycidyl ether. Subsequently, IV-VI were copolymerized...
The polybutylene terephthalate (PBT)/oxazoline containing polystyrene (RPS) graft copolymer was prepared through melt reaction of PBT and RPS. The formation of the PBT/RPS graft copolymer was noticed by the increase in torque during melt blending in a Haake Buchler internal mixer and also confirmed by the observation of Fourier transform infrared spectroscopy (FT-IR) after the extraction of RPS from...
The transport of buffer solutions (pH 4.1–7.2) in hydroxyethyl methacrylate copolymer (HEMA) is investigated. The diffusion coefficient of Case I transport, the velocity of Case II transport and the activation energy of the transport process in non-irradiated HEMA are determined. The buffer transport in HEMA copolymers irradiated by γ-rays in vacuum and in air is also studied. After irradiation, the...
The effects of composition on crystallization behavior, crystal transformation, and morphology of crystalline/crystalline PP/PB-1 blends are complicated. The crystallization rate of PP decreases with increasing PB-1 content in the cooling or isothermal crystallization process. Avrami constants of the PP crystallization are, however, insignificantly dependent on the PB-1 content. The crystallization...
A processable polyimide having azo-chromophore functionalized with cyanosulfonyl group (PI-SOT) was prepared for nonlinear optics applications. To introduce a highly nonlinear optical active chromophore on the polyimide matrix, we first synthesized monomers 4-[N,N-bis(hydroxyethyl)amino]-4′-(2,5-dioxolane)azobenzene (AZO-OH2) and 4,4′-(hexafluoroisopropylidene)diphthalimide (6F-DI). After the polymerization...
The mass transport of methanol mixed with ferric chloride hexahydrate (FeCl 3 .6H 2 O) in poly(methyl methacrylate) (PMMA) and the related optical properties have been investigated. The ratio of FeCl 3 .6H 2 O to methanol in the solvent mixture is X=0.013, 0.038 and 0.063g/g. The mass transport is anomalous, which is a mixture of Case I with Case II transport. Both...
The miscibility of poly(ethylene terephthalate) (PET) with polyarylate (PAr), polycarbonate (PC), and poly(estercarbonate) (PEC), polyarylate–polycarbonate random copolymer were examined from thermal properties, and morphology. PAr, PC and PEC all showed phase separation behavior in blends with PET. On the other hand, as the carbonate/ester repeating unit ratio increases, the penetration of PEC into...
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