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Showing 1-26 of 26 results for "181455" within Papers
Yanfei Yang et al.
Journal of the American Chemical Society, 134(36), 14714-14717 (2012-08-29)
The studies described here show that a relatively low molecular weight, narrow polydispersity polyethylene (PE) wax (Polywax) can serve as a nontoxic and nonvolatile alternative to alkane solvents in monophasic catalytic organic reactions where catalysts and products are separated under
David B Thompson et al.
Langmuir : the ACS journal of surfaces and colloids, 27(24), 14820-14827 (2011-11-09)
The use of a hyperthermal hydrogen induced cross-linking process to prepare laminates comprising polypropylene, poly(isobutylene-co-isoprene), and poly(vinyl acetate) is described. In this new, milder alternative to conventional plasma techniques, neutral molecular hydrogen projectiles were used to create carbon radicals on
Judit E Puskas et al.
Biomaterials, 31(9), 2477-2488 (2009-12-26)
This paper presents the synthesis and characterization of a polyisobutylene (PIB)-based nanostructured carbon-reinforced thermoplastic elastomer. This thermoplastic elastomer is based on a self-assembling block copolymer having a branched PIB core carrying -OH functional groups at each branch point, flanked by
Deniz C Tuncaboylu et al.
Langmuir : the ACS journal of surfaces and colloids, 26(10), 7574-7581 (2010-01-29)
Organic-inorganic hybrid materials attract particular interest because of their excellent mechanical properties. Here, we report the synthesis of hybrid cryogels consisting of interpenetrated polyisobutylene and silica networks. The gels were prepared by cross-linking of butyl rubber in cyclohexane containing silica
Corinne Vebert-Nardin
Chimia, 65(10), 782-786 (2011-11-08)
With this article, we wish to give an overview of our main research activities assessing the potential of a suitable polymer modification of DNA fragments to self-assemble biologically active nanostructures. Specifically, the grafting of a hydrophobic polymer segment on DNA
Ivan Yu Eremchev et al.
Physical chemistry chemical physics : PCCP, 13(5), 1843-1848 (2010-12-25)
Numerous experiments have shown that the low-temperature dynamics of a wide variety of disordered solids is qualitatively universal. However, most of these results were obtained with ensemble-averaging techniques which hide the local parameters of the dynamic processes. We used single-molecule
International journal of toxicology, 27 Suppl 4, 83-106 (2009-01-06)
Polyisobutene and Hydrogenated Polyisobutene are homopolymers of isobutene. These ingredients are produced in a wide range of molecular weights. Polybutene is a chemically related cosmetic ingredient previously determined to be safe as used in cosmetic products. Polyisobutene is used in
A Jonás et al.
Langmuir : the ACS journal of surfaces and colloids, 26(17), 14223-14230 (2010-08-05)
Diffusive mixing in a model polymer blend of limited miscibility (i.e., the pair polydimethylsiloxane/polyisobutene) is investigated. The diffusion process is followed in the actual droplet-based microstructure of the polymer blend, as opposed to the ideal planar geometry used in previous
Seyed Mojtaba Taghizadeh et al.
Drug development and industrial pharmacy, 35(4), 487-498 (2008-12-02)
In this study, the influence of the ratio of silicone (Si) to acrylic pressure-sensitive adhesive (PSA), polyvinyl pyrrolidone (PVP), and lauryl alcohol (LA) % (wt/wt) on the properties of a drug in adhesive patch containing 4% (wt/wt) fentanyl as model
C Götz et al.
Journal of the mechanical behavior of biomedical materials, 10, 206-215 (2012-04-24)
This study examines the morphology, thermal, quasi-static and long-term dynamic creep properties of one linear and three arborescent polyisobutylene-based block copolymers (L_SIBS31, D_IBS16, D_IBS27 and D_IBS33). Silicone rubber, a common biopolymer, was considered as a benchmark material for comparison. A
Hong Seok Choi et al.
Langmuir : the ACS journal of surfaces and colloids, 28(1), 849-854 (2011-11-25)
The optical properties of polymeric materials, such as transmission loss and the thermo-optic coefficient, determine their utility in numerous applications, ranging from nanotechnology to the automotive and aerospace industries. However, because of the wide variation in the physical properties of
Abhimanyu Paraskar et al.
Nanotechnology, 23(7), 075103-075103 (2012-01-26)
Nanoscale drug delivery vehicles have been extensively studied as carriers for cancer chemotherapeutics. However, the formulation of platinum chemotherapeutics in nanoparticles has been a challenge arising from their physicochemical properties. There are only a few reports describing oxaliplatin nanoparticles. In
Annalisa Calò et al.
Langmuir : the ACS journal of surfaces and colloids, 26(8), 5312-5315 (2010-03-26)
This work reports the application of a patterned thin film of polyisobutylene (PIB) irradiated with an electron beam as a time-temperature integrator, i.e., a device that is able to record the thermal history of a product. The device is fabricated
David Cozzens et al.
Langmuir : the ACS journal of surfaces and colloids, 27(23), 14160-14168 (2011-10-26)
The surface properties and biocompatibility of a class of thermoplastic polyurethanes (TPUs) with applications in blood-contacting medical devices have been studied. Thin films of commercial TPUs and novel polyisobutylene (PIB)-poly(tetramethylene oxide) (PTMO) TPUs were characterized by contact angle measurements, X-ray
David Cozzens et al.
Journal of biomedical materials research. Part A, 95(3), 774-782 (2010-08-21)
Long term in vitro biostability of thermoplastic polyurethanes (TPUs) containing mixed polyisobutylene (PIB)/poly(tetramethylene oxide) (PTMO) soft segment was studied under accelerated conditions in 20% H(2)O(2) solution containing 0.1M CoCl(2) at 50 °C to predict resistance to metal ion oxidative degradation
Victoria Volkis et al.
Journal of the American Chemical Society, 131(9), 3132-3133 (2009-02-14)
In the presence of LiCB(11)Me(12) catalyst and a nonoxidizing radical initiator, isobutylene undergoes radical chain polymerization in an inert solvent at ambient temperature and pressure to give a new highly branched form of polyisobutylene. Copolymerization with ethyl acrylate is also
Goy Teck Lim et al.
Biomacromolecules, 12(5), 1795-1799 (2011-04-01)
This paper is the first report of electrospinning neat polyisobutylene-based thermoplastic elastomers. Two generations of these materials are investigated: a linear poly(styrene-b-isobutylene-b-styrene) (L_SIBS) triblock copolymer and a dendritic poly(isobutylene-b-p-methylstyrene) (D_IB-MS), also a candidate for biomedical applications. Cross-polarized optical microscopy shows
Bobby Pejcic et al.
Talanta, 85(3), 1648-1657 (2011-08-03)
This report compares the performance of polymer and carbon nanotube-polymer composite membranes on a quartz crystal microbalance (QCM) sensor for the detection of aromatic hydrocarbons (benzene, toluene, ethylbenzene, p-xylene and naphthalene) in aqueous solutions. Several different polymers (polystyrene, polystyrene-co-butadiene, polyisobutylene
Noor Muhammad et al.
Journal of nanobiotechnology, 9, 8-8 (2011-03-19)
Channel proteins like the engineered FhuA Δ1-159 often cannot insert into thick polymeric membranes due to a mismatch between the hydrophobic surface of the protein and the hydrophobic surface of the polymer membrane. To address this problem usually specific block
M Engel et al.
The Journal of chemical physics, 132(22), 224502-224502 (2010-06-17)
We present results of in situ measurements of the filling process of polymer melts in nanopores. After accurate characterization of the empty nanopores, they are filled with the hydrophobic polyisobutylene and the hydrophilic poly-epsilon-caprolactone. The filling process is investigated in
Christianne Mounir Zaki Rizkalla et al.
Pharmaceutical development and technology, 18(1), 196-209 (2012-06-06)
The systemic effect of hydroxyzine hydrochloride following its oral administration or topical application is associated with non compliant anticholinergic effect. Subsequently, the present study aims to prepare microcapsules loaded with hydroxyzine hydrochloride enabling its controlled release into the skin and
Abhimanyu S Paraskar et al.
Proceedings of the National Academy of Sciences of the United States of America, 107(28), 12435-12440 (2010-07-10)
Cisplatin is a first line chemotherapy for most types of cancer. However, its use is dose-limited due to severe nephrotoxicity. Here we report the rational engineering of a novel nanoplatinate inspired by the mechanisms underlying cisplatin bioactivation. We engineered a
Xiaolin Cao et al.
Applied spectroscopy, 64(8), 895-900 (2010-08-20)
Identification of foreign microparticles in drug products is one of the first steps in evaluating the nature of particle contamination and its consequences for product quality. To characterize various foreign particles, we use spectral database search methods as well as
Muhammad Noor et al.
Journal of biotechnology, 157(1), 31-37 (2011-11-02)
Polymer based nanocompartments have potential applications in synthetic biology, medicine (drug release) and industrial biotechnology (chiral nanoreactors, multistep syntheses, selective product recovery). A step towards the aforementioned goals is the polymer membrane functionalization through covalent bonding of chemical anchors or
Judit E Puskas et al.
Biomacromolecules, 5(4), 1141-1154 (2004-07-13)
Novel polyisobutylene-based thermoplastic elastomers are introduced as prospective implant materials for soft tissue replacement and reconstruction. In comparison, poly(ethylene terephthalate) (PET), poly(tetrafluoroethylene) (PTFE), polypropylene (PP), polyurethanes (PU), and silicones are outlined from well-established implant history as being relatively inert and
Jinping Dong et al.
Langmuir : the ACS journal of surfaces and colloids, 25(10), 5442-5445 (2009-05-13)
Drug release from therapeutic biomedical films such as drug-polymer composite coatings on drug eluting stents is a highly complex and poorly understood process. The dynamics of drug release and the evolution of surface morphology during release have direct impact on
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