Template polymerisation and co-polymerisation

Połówiński, S.

doi:10.1016/s0079-6700(01)00035-1

Cited by 155 publications

(103 citation statements)

References 110 publications

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“…It is reported that CS can act as an ionic template for free-radical polymerization of acrylic acid/methacrylic acid, and presence of template during the polymerization procedure has kinetic and structural effects on growing polymer chains. 36,37 SEM studies clearly indicated that morphological characteristics of the microparticles were affected by the inclusion of CS.…”

Section: Resultsmentioning

confidence: 99%

Interpolymer complex microparticles based on polymethacrylic acid‐chitosan for oral insulin delivery

Sajeesh

Sharma

2005

J of Applied Polymer Sci

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ABSTRACT:In the present study, microparticles composed of polymethacrylic acid-chitosan (PMAA-CS) were prepared by a novel interionic gelation method. Free-radical polymerization of methacrylic acid was carried out in the presence of CS, using a water-soluble initiator, and application of these microparticles toward oral insulin delivery was evaluated. Microparticles obtained were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) studies. From SEM studies, it was observed that microparticles had an aggregated morphology with size ϳ20 m, while FTIR confirmed the presence of ionic interaction between PMAA and CS chains. Protein loading was done by diffusion filling method, and from in vitro release study, it was observed that insulin-loaded microparticles displayed a pH depended release profile at alkaline/acidic pH. Microparticles exhibited sustained release of insulin for 3-4 h at neutral pH, and enzyme linked immunosorbent assay (ELISA) proved that encapsulated protein maintained 100% biological activity at neutral pH. Preliminary study suggests that these microparticles can serve as good candidate for oral protein delivery.

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Section: Resultsmentioning

confidence: 99%

Interpolymer complex microparticles based on polymethacrylic acid‐chitosan for oral insulin delivery

Sajeesh

Sharma

2005

J of Applied Polymer Sci

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“…Poly(acrylamide-acrylic acid-dimethylaminoethyl methacrylate) (P(AAm-AA-DMAEMA)) was prepared by the template copolymerization (Siyam and AbdElatif 1999;Polowinski 1997Polowinski , 2002 technique of monomers (AA, DMAEMA) on template polymer PAAm in aqueous solution using gamma rays as initiator. NMBA aqueous solution was mixed with PAAm gel.…”

Section: Preparation Of Polymermentioning

confidence: 99%

Radiation Synthesis of Poly(Acrylamide-Acrylic Acid-Dimethylaminoethyl Methacrylate) Resin and Its Use for Binding of Some Anionic Dyes

Abdel-Aziz

Siyam

2010

Water Air Soil Pollut

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Poly(acrylamide-acrylic acid-dimethylaminoethyl methacrylate) P(AAm-AA-DMAEMA) resin was prepared by the template copolymerization. PAAm was used as a template for the copolymerization of DMAEMA and AA in aqueous solution using gamma rays. The adsorption of indigo carmine and eriochrome black-T anionic dyes from aqueous media on P(AAm-AA-DMAEMA) has been investigated. The adsorption behavior of this resin has been studied under different adsorption conditions: dye concentrations (50-500 mg l −1 ), contact times, temperature (30-55°C), and pH values (2-7). The amount of dye adsorbed increased with increasing resin content, but it had a little change with temperature and decreased slightly with increasing pH. Adsorption data of the samples were modeled by the pseudo-first-order and pseudosecond-order kinetic equations in order to investigate dye adsorption mechanism. It was found that the adsorption kinetics of the resin followed a pseudosecond-order model with rate constant (k 2 ) of 2.5×10 −3 and 1.8×10 −2 g (mg −1 min −1 ) for indigo carmine and eriochrome black-T, respectively. Equilibrium isotherms were analyzed using the Langmuir and Freundlich isotherms. It was seen that the Freundlich model fits the adsorption data better than the Langmuir model.

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“…FT-IR (KBr window): 3 056, 2 995, 2 934, 2 873 (alky C-H); 1 255 (C-O-C of epoxide); 1 109 (Si-O-Si); 910 cm À1 (epoxide). 1 29 Si NMR (CDCl 3 , ppm): d ¼ 65.2, a-addition; 67.6 small, b-addition.…”

Section: Syntheses Of Possmentioning

confidence: 99%

“…The samples were dissolved with CDCl 3 and the 1 H, 13 C and 29 Si NMR spectra were obtained with tetramethylsilane (TMS) as the internal reference.…”

Section: Nuclear Magnetic Resonance (Nmr) Spectroscopymentioning

confidence: 99%

“…P4VP quaternized with organic bromides has been employed as a polyelectrolyte bearing polycations; [21][22][23][24] the crosslinked P4VP can be used as electrode material [25][26][27] and chromatographic packing material (e.g., as the stationary phase). [28] Generally speaking, crosslinked P4VP can be prepared via copolymerization of 4-vinylpyridine with compounds containing two vinyl groups (e.g., divinylbenzene) [29] or via the quaternization of P4VP with dihalides. Nonetheless, there are few reports on the crosslinking of P4VP via an insitu macromolecular reaction.…”

Section: Introductionmentioning

confidence: 99%

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Poly(4‐vinylpyridine) Nanocrosslinked by Polyhedral Oligomeric Silsesquioxane

Liu

Meng

Zheng

2005

Macromol. Rapid Commun.

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Summary: Octa(propylglycidyl ether) polyhedral oligomeric silsesquioxane (OpePOSS) was used as the crosslinking agent to prepare the nanocrosslinked poly(4‐vinylpyridine) (P4VP) with POSS content up to 55.2 wt.‐%. The formation of the crosslinked structure is ascribed to the macromolecular reaction between pyridine rings of P4VP and epoxide groups of OpePOSS. The POSS‐crosslinked P4VP displayed enhanced glass transition temperatures (Tgs) and an improved thermal stability in terms of the results of thermal analysis.Crosslinking of poly(4‐vinylpyridine) with octa(propylglycidyl ether) polyhedral oligomeric silsesquioxane.magnified imageCrosslinking of poly(4‐vinylpyridine) with octa(propylglycidyl ether) polyhedral oligomeric silsesquioxane.

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Template polymerisation and co-polymerisation

Cited by 155 publications

References 110 publications

Interpolymer complex microparticles based on polymethacrylic acid‐chitosan for oral insulin delivery

Interpolymer complex microparticles based on polymethacrylic acid‐chitosan for oral insulin delivery

Radiation Synthesis of Poly(Acrylamide-Acrylic Acid-Dimethylaminoethyl Methacrylate) Resin and Its Use for Binding of Some Anionic Dyes

Poly(4‐vinylpyridine) Nanocrosslinked by Polyhedral Oligomeric Silsesquioxane

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