نتایج جستجو برای: graft copolymers

تعداد نتایج: 92068  

A. Fathi M. Abbasian M. Jaymand M. Z. Ghadami

Exfoliated poly (Chloromethyl styrene-co-styrene)-g-polyacrylonitryle/organo- modified montmorillonite [P(CMSt-co-St)-g-PAN/O-MMT] nanocomposite was synthesized through solution intercalation method by using atom transfer and nitroxide mediated radical polymerization. At first, poly (chloromethyl styrene-costyrene) copolymer was synthesized by nitroxide - mediated “living” free radical polyme...

Journal: : 2022

Polymeric micelles are nanoscale core-shell structures formed by amphiphilic (block or graft) copolymers, that can self-aggregate in an aqueous medium. PMs characterized small size, spherical shape, lower critical micellar concentration, which gave higher
 stability for over conventional surfactant micelles. The core/shell structure permits polymeric micelle to entrap poor soluble drugs an...

2013
Nader Zabarjad Shiraz Elaheh Sadat Sharifzadeh Mohammad Bayat Shiva Masoudi

In this study some new fluorophore-enriched polymers were synthesized using the reactions of bisphenol-A resin and fluorescein in the presence of PVA or polyetherdiamine as hardener. The structures of polymers were elucidated by IR, UV and fluorimetry spectrometry. Polymers applied as coating on water are diffusible surface. The results of fluorimetry on penetrated water containing fluorescent ...

2013
Jui-Yang Lai

Ocular drug delivery is one of the most commonly used treatment modalities in the management of glaucoma. We have recently proposed the use of gelatin and poly(N-isopropylacrylamide) (PNIPAAm) graft copolymers as biodegradable in situ forming delivery systems for the intracameral administration of antiglaucoma medications. In this study, we further investigated the influence of carrier characte...

Aiyoub Parchehbaf Jadid Meysam Nouri Molalar Mohammad Hossein Nasirtabrizi, Zahed Ghashangi,

4-ChloroMethyl Styrene (CMS) was copolymerized with different monomers such as Methyl MethAcrylate (MMA), Methyl Acrylate (MA), 2-EthylHexyl Acrylate (EHA) by free radical polymerization method at 70 ±1°C using a,a'-Azobis(IsoButyroNitrile) (AIBN) as an initiator. The copolymer compositions were obtained using related 1HNMR spectra and the poly...

2008
Sung Won Choi Arihiro Kano Atsushi Maruyama

We have previously reported that poly(l-lysine)-graft-dextran cationic comb-type copolymers accelerate strand exchange reaction between duplex DNA and its complementary single strand by >4 orders of magnitude, while stabilizing duplex. However, the stabilization of the duplex is considered principally unfavourable for the accelerating activity since the strand exchange reaction requires, at lea...

Journal: :Accounts of chemical research 2005
Daoyong Chen Ming Jiang

We succeeded recently in developing a series of new pathways to polymeric micelles and hollow spheres via intermolecular specific interactions. A new micellization mechanism of block copolymers was realized by using the specific interaction between a low molecular weight compound and one of the blocks in low-polarity solvents. Many more successes have been achieved by our "block copolymer-free"...

2012
Fuji Sakai Guosong Chen Ming Jiang

A series of random copolymers poly[(N-isopropyl acrylamide)-co-(aminoethyl methacrylate b-cyclodextrin)] (PNiCD) were synthesized by free radical polymerization, followed by examination of their physical properties to measure , ,Mw and A2 using dynamic and static light scattering (DLS and SLS). The cyclodextrin (CD) moiety attached to the main chain plays two roles. As supramolecular ho...

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