A5058438655- Polymer crystallization and properties
- Advanced Polymer Synthesis and Characterization
- Polymer Nanocomposites and Properties
- Synthesis and properties of polymers
- biodegradable polymer synthesis and properties
- Silicone and Siloxane Chemistry
- Conducting polymers and applications
- Adsorption, diffusion, and thermodynamic properties of materials
- Epoxy Resin Curing Processes
- Material Dynamics and Properties
- Membrane Separation and Gas Transport
- Organic Electronics and Photovoltaics
- Polymer Science and PVC
- Phase Equilibria and Thermodynamics
- Polymer composites and self-healing
- Rheology and Fluid Dynamics Studies
- Advanced Sensor and Energy Harvesting Materials
- Surface Modification and Superhydrophobicity
- Organic Light-Emitting Diodes Research
- Fuel Cells and Related Materials
- Analytical Chemistry and Chromatography
- Surfactants and Colloidal Systems
- Thermal and Kinetic Analysis
- Enzyme Catalysis and Immobilization
- Synthetic Organic Chemistry Methods
Dow Chemical (United States)
2009-2025
Guangxi University
2025
Northwestern Polytechnical University
2025
Second Affiliated Hospital of Zhejiang University
2025
Dalian University
2024
Dalian University of Technology
2024
Beijing University of Chinese Medicine
2016-2024
Institute of Scientific and Technical Information
2024
East China University of Science and Technology
2024
Xi’an University of Posts and Telecommunications
2024
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermally Induced Phase Separation Behavior of Compatible Polymer MixturesT. Nishi, T. Wang, and K. KweiCite this: Macromolecules 1975, 8, 2, 227–234Publication Date (Print):March 1, 1975Publication History Published online1 May 2002Published inissue 1 March 1975https://pubs.acs.org/doi/10.1021/ma60044a025https://doi.org/10.1021/ma60044a025research-articleACS PublicationsRequest reuse permissionsArticle Views2332Altmetric-Citations325LEARN ABOUT...
Abstract Designing heterogeneous interface to enhance the kinetics for electrocatalysts is a highly efficient but challenging pathway toward hydrogen evolution reaction (HER) in water electrolysis. Herein, coupling of CeO 2 quantum dots onto porous Ru aerogel through interfacial Ru‐O‐Ce bridge proposed construct ‐Ru as superior HER electrocatalyst with ultra‐low overpotentials. In situ characterizations and theoretical calculations reveal electron distribution at boost bonding sites, faster...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Study of Compatible Polymer MixturesT. K. Kwei, T. Nishi, and R. F. RobertsCite this: Macromolecules 1974, 7, 5, 667–674Publication Date (Print):September 1, 1974Publication History Published online1 May 2002Published inissue 1 September 1974https://pubs.acs.org/doi/10.1021/ma60041a023https://doi.org/10.1021/ma60041a023research-articleACS PublicationsRequest reuse permissionsArticle Views681Altmetric-Citations252LEARN ABOUT THESE METRICSArticle...
Abstract The solubility of poly(ethyl oxazoline) in aqueous solutions was studied. cloud point temperatures decreased the presence sodium chloride but increased by addition tetrabutylammonium bromide or dioxane. Solution‐cast films blends polymer and poly(acrylic acid) were miscible, mutual precipitation occurred water, methanol, compositions complexes correspond most cases to simple molar ratios interacting groups. glass transition are higher than values for same compositions, high...
The kinetics of wetting both high-energy (aluminum, mica) and low-energy (FEP Teflon) surfaces by thermostated polyethylene ethylene-vinyl acetate copolymer melts in air were followed the rate approach apparent contact angle θ to its final value θ∞ change radius base polymer melt drop, r, with time. volume drops studied varied from 0.006 cm3 0.028 could be interval about 100°>θ≥θ∞. melted maintain shape a spherical segment. reduced dimension r/r0, where r0 is r when 90°, universal...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCompatibility in Blends of Poly(methyl methacrylate) and Poly(styrene-co-acrylonitrile). 2. An NMR StudyV. J. McBrierty, D. C. Douglass, T. K. KweiCite this: Macromolecules 1978, 11, 6, 1265–1267Publication Date (Print):November 1, 1978Publication History Published online1 May 2002Published inissue 1 November 1978https://pubs.acs.org/doi/10.1021/ma60066a038https://doi.org/10.1021/ma60066a038research-articleACS PublicationsRequest reuse...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTernary Polymer MixturesT. K. Kwei, H. L. Frisch, W. Radigan, and S. VogelCite this: Macromolecules 1977, 10, 1, 157–160Publication Date (Print):January 1977Publication History Published online1 May 2002Published inissue 1 January 1977https://pubs.acs.org/doi/10.1021/ma60055a032https://doi.org/10.1021/ma60055a032research-articleACS PublicationsRequest reuse permissionsArticle Views1177Altmetric-Citations148LEARN ABOUT THESE METRICSArticle Views are...
The reorientational dynamics of dipoles in poly(vinylidene fluoride)/poly(methyl methacrylate) (PVDF/PMMA) blends were investigated by dielectric spectroscopy. Measurements performed over a wide range temperature and frequency, previously unavailable results are reported. Various relaxation processes identified their locations assigned to the different morphological regions PVDF, PMMA, PVDF/PMMA blends. development process associated with imperfections crystalline phase was recorded both...
Synchrotron infrared microspectroscopy (SIRMS) was used for the first time to image distribution and secondary structure of an enzyme (lipase B from Candida antarctica, CALB) immobilized within a macroporous polymer matrix (poly(methyl methacrylate)) at 10 μm resolution. The beads this catalyst (Novozyme435) were cut into thin sections (12 μm). SIRMS imaging these revealed that is localized in external shell bead with thickness 80−100 μm. Also, unevenly distributed throughout shell....
Abstract Partially modified polystyrene containing vinyl phenyl hexafluorodimethyl carbinol was mixed with a number of counterpolymers poly(vinyl-acetate), poly(methyl methacry1 ate), poly(ethy] methacrylate, poly (n-butyl methacry late), poly(viny] methyl ether), poly(2,6 dimethyl-1,4 phenylene oxide), bisphenol A polycarbonate poly(styrene-co-acryloni-trile), (dimethyl siloxane), crystallizable polyester, an amorphous polyamide and two polyamides. Hydrogen bonding interactions to effect...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOn the physical meaning of Kwei equation for glass transition temperature polymer blendsAnshyang A. Lin, T. K. Kwei, and Arnost ReiserCite this: Macromolecules 1989, 22, 10, 4112–4119Publication Date (Print):October 1, 1989Publication History Published online1 May 2002Published inissue 1 October 1989https://doi.org/10.1021/ma00200a052Request reuse permissions Article Views785Altmetric-Citations117LEARN ABOUT THESE METRICSArticle Views are...
Immobilized Lipase B from Candida antartica (Novozyme 435) catalyzed bulk polycondensations at 70 °C for 42 h that resulted in hyperbranched polyesters with octanediol-adipate and glycerol-adipate repeat units. Instead of using organic solvents, the monomers adipic acid (A2), 1,8-octanediol (B2), glycerol (B'B2) were combined to form monophasic ternary mixtures. During first 18 a copolymerization monomer feed ratio (A2 B2 B'B2) 1.0:0.8:0.2 mol/mol, regioselectivity Novozyme 435 linear...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCompatibility in Mixtures of Poly(vinylidene fluoride) and Poly(ethyl methacrylateT. K. Kwei, G. D. Patterson, T. WangCite this: Macromolecules 1976, 9, 5, 780–784Publication Date (Print):September 1, 1976Publication History Published online1 May 2002Published inissue 1 September 1976https://pubs.acs.org/doi/10.1021/ma60053a018https://doi.org/10.1021/ma60053a018research-articleACS PublicationsRequest reuse permissionsArticle...
We report the ring-opening polymerization reaction of ε-caprolactone in supercritical carbon dioxide (scCO2) using an enzyme catalyst, Lipase B from Candida antarctica supported on macroporous beads (Novozym-435). Ring-opening lactones is more commonly performed organic solvents or bulk a Lewis acid catalyst. Recently there has been much interest replacement such catalysts by enzymes. demonstrate that enzymatic route viable scCO2, yielding poly(ε-caprolactone) (Mn = 12 000−37 000 g mol-1)...
ADVERTISEMENT RETURN TO ISSUEPREVArticleCorrelation between the glass transition temperatures of polymer mixtures and intermolecular force parametersT. K. Kwei, Eli M. Pearce, John R. Pennacchia, ChartonCite this: Macromolecules 1987, 20, 5, 1174–1176Publication Date (Print):May 1, 1987Publication History Published online1 May 2002Published inissue 1 1987https://pubs.acs.org/doi/10.1021/ma00171a055https://doi.org/10.1021/ma00171a055research-articleACS PublicationsRequest reuse...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCompatibility in Blends of Poly(methyl methacrylate) and Poly(styrene-co-acrylonitrile). 1. Physical PropertiesK. Naito, G. E. Johnson, D. L. Allara, T. K. KweiCite this: Macromolecules 1978, 11, 6, 1260–1265Publication Date (Print):November 1, 1978Publication History Published online1 May 2002Published inissue 1 November 1978https://pubs.acs.org/doi/10.1021/ma60066a037https://doi.org/10.1021/ma60066a037research-articleACS PublicationsRequest reuse...
The dynamic Young's moduli E of molded films a polyethylene and polypropylene were found to decrease with increasing thickness t. An upper limit appears exist when the film is reduced less than 1 mil. For thicker films, inversely proportional Finally, modulus approaches lower asymptotic value t in excess 20 results can be represented quantitatively by model which surface transcrystalline region bulk phase polymer respond parallel combination applied stress. each higher that phase. about 12 μ...
Cu(ii)-catalyzed aromatic C-H azidation with azido-benziodoxolone under mild conditions has been described. The primary amine exhibits an excellent ortho-directing effect, providing ortho-azidated anilines as the sole products.
The craze-initiation criteria for craze-prone glassy polymers are examined with a model test method. In this method prismatic sample of polystyrene an embedded steel ball is subjected to simple tension until crazing takes place around the interface. Stress analysis showed that various published will predict appearance first crazes at different locations on interface in such samples. Thus by comparing experimental and analytical results it possible determine from actual which existing...