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Effect of Polymers and Media Type on Extending the Dissolution of Amorphous Pioglitazone and Inhibiting the Recrystallization from a Supersaturated State
Amorphous forms of crystalline drug are widely utilized for bioavailability enhancement of low solubility drugs in the pharmaceutical industry. Polymers have been found to be effective crystallization inhibitors for amorphous forms in solid states during storage or in liquid states during dissolution process. The dissolution and crystallization behaviors of these amorphous forms in the presence or...
http://www.polymer.cnt//ss/shinianqiu/publicationsshow_10310.html |
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Impact of amorphous and semicrystalline polymers on the dissolution and crystallization inhibition of pioglitazone hydrochloride solid dispersions
Solid dispersions are used as a useful approach to improve the dissolution rate and bioavailability of poorly water-soluble active pharmaceutical ingredients (APIs). The present study investigated the impact of amorphous polymers (polyvinylpolypyrrolidone K30 and polyvinylpolypyrrolidone K90) and semicrystalline polymers (polyethyleneglycol 6000 and polyethylene–polypropylene glycol 188) on the...
http://www.polymer.cnt//ss/shinianqiu/publicationsshow_10309.html |
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(ACS Applied Materials & Interfaces) Local Controllable Laser Patterning of Polymers Induced by Graphene Material
Graphene has been successfully applied to the field of polymer laser patterning. As an efficient 1064 nm near-infrared (NIR) pulsed laser absorber, the graphene prepared by the mechanical exfoliation of only 0.005 wt% (50 ppm) endowed polymer materials with a very good performance of NIR pulsed laser patterning. Optical microscopy observed that the generated black patterns came from the local di...
http://www.polymer.cnt//ss/zhoutaopoly/publicationsshow_10288.html |
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[Polym.Chem.]ABx -type amphiphilic macromonomer-based supramolecular hyperbranched polymers for controllable self-assembly
A macromonomer strategy has displayed potential advantages of constructing functional supramolecular hyperbranched polymers (SHPs); however, owing to the limited functional group number and weak noncovalent interactions, it is difficult to control the dynamic self-assembly process of SHPs based on the reported AB 2 -type hydrophilic macromonomers. In this work, a novel SHP was fir...
http://www.polymer.cnt//ss/tianwei/publicationsshow_10075.html |
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[Reactive and Functional Polymers]RAFT polymerization and dually responsive behaviors of terpyridine-containing PNIPAAm copolymers in dilute solutions
Introduction of new components is an effectiveway to gain new functionalities and to regulate the
properties of responsive polymers. In the presentwork, a RAFT polymerization approach to terpyridine-containing poly(N-isopropyl acrylamide) (PNIPAAm) copolymers was developed and the dually responsive behavior of the obtained polymer to temperature variation and metal ions in dilute solutions were ...
http://www.polymer.cnt//ss/zhouhongwei/publicationsshow_10056.html |
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Synthesis of High-Performance Polymers via Copper-Catalyzed Amination of Dibromoarenes with Primary Aromatic Ether Diamines
In this paper, we introduce three high-performance polymers with similar structures, poly(imino ether ketone) (PIEK)s, which are synthesized by the ligand free copper-catalyzed C-N cross coupling reaction of aryl halides and primary aromatic diamines at moderate temperature. The influence of the solvents, base, temperature, and catalyst ligands on the polycondensation reaction is investigated. T...
http://www.polymer.cnt//ss/changguanjun/publicationsshow_9972.html |
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Synthesis of indole-based functional polymers with well-defined structures via a catalyst-free C–N coupling reaction
Poly(N-arylene diindolylmethane)s (PMDINs) with precise structures and high molecular weights (Mw up to 389 200) in high yields (up to 95%) were synthesized by the catalyst-free nucleophilic substitution polycondensation of 3,30-diindolylmethane with different activated difluoro monomers via a C–N coupling reaction process. A model reaction was carried out to assist in determining the optimal r...
http://www.polymer.cnt//ss/changguanjun/publicationsshow_9968.html |
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[Chem. Soc. Rev.] Supramolecular shape memory hydrogels: A new bridge between stimuli-responsive polymers and supramolecular chemistry
Supramolecular shape memory hydrogels (SSMHs)
refer to shape memory polymers, in which temporary shapes are stabilized by
reversible crosslinks such as supramolecular interactions and dynamic covalent
bonds. Following a brief introduction of the conventional shape memory polymers
(SMPs), this tutorial review is focused to summarize a recent advancement on various
reversible crosslinks employed to ...
http://www.polymer.cnt//ss/chentaogroup/publicationsshow_9932.html |
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Crystalline Regio-/Stereoregular Glycine-Bearing Polymers from ROMP: Effect of Microstructures on Materials Performances.
Synthesis of amino acid or peptide-bearing polymers with controlled microstructures is still a long-going challenge in polymer chemistry in contrast to natural biopolymers with exactly controlled microstructures like proteins and DNA. Here, a series of new glycine-substituted cyclooctenes monomers were designed and synthesized. Ring-opening metathesis polymerizations (ROMP) of all 3-substituted ...
http://www.polymer.cnt//ss/taoyouhua/publicationsshow_9884.html |
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A Series of Exceptionally Robust Luminescent Coordination Polymers based on a Bipyridinedicarboxylate Ligand and Rare Earth Metal Ions
A series of three-dimensional rare-earth coordination polymers, [M2(bpdc)3(H2O)4] (M = Y [1], Sm [2], Eu [3], Gd [4], Tb [5], Dy [6], Er [7], and Yb [8]) were synthesized by solvothermal reactions of 2,2′-bipyridine-5,5′-dicarboxylate (bpdc) with corresponding metal salts. Single-crystal and powder X-ray diffraction analyses demonstrated that these coordination polymers are isostructural. The ca...
http://www.polymer.cnt//ss/zhaoxuebo/publicationsshow_9839.html |
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