A5101550833- biodegradable polymer synthesis and properties
- Polymer crystallization and properties
- Polymer Nanocomposites and Properties
- Carbon dioxide utilization in catalysis
- Fiber-reinforced polymer composites
- Surfactants and Colloidal Systems
- Advanced Polymer Synthesis and Characterization
- Polymer Surface Interaction Studies
- Microplastics and Plastic Pollution
- Advanced Sensor and Energy Harvesting Materials
- Additive Manufacturing and 3D Printing Technologies
- Polymer Foaming and Composites
- Advanced Cellulose Research Studies
- Analytical Chemistry and Sensors
- Surface Modification and Superhydrophobicity
- Graphene and Nanomaterials Applications
- Adsorption, diffusion, and thermodynamic properties of materials
- Mesoporous Materials and Catalysis
- Synthesis and properties of polymers
- Epoxy Resin Curing Processes
- Material Dynamics and Properties
- Flame retardant materials and properties
- Membrane Separation and Gas Transport
- Biopolymer Synthesis and Applications
- Conducting polymers and applications
Rikkyo University
2009-2020
Fuzhou University
2015-2018
National Institute of Advanced Industrial Science and Technology
2003-2008
Tokyo Institute of Technology
1999-2004
Yamagata University
2001
The University of Tokyo
2001
Virginia Tech
1997-1999
Clarkson University
1993-1995
Materials Processing (United States)
1993
Stanford University
1986-1991
The thermal conductive properties, including the diffusivity and resultant conductivity, of nonwoven nanocellulose sheets were investigated by separately measuring in in-plane thickness directions with a periodic heating method. cross-sectional area (or width) cellulose crystallites was main determinant properties. Thus, results strongly indicate that there is crystallite size effect on phonon conduction within sheets. also indicated large interfacial resistance between surfaces. propagation...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplex formation between poly(acrylic acid) and pyrene-labeled polyethylene glycol in aqueous solutionHideko Tamaru Oyama, Wing T. Tang, Curtis W. FrankCite this: Macromolecules 1987, 20, 3, 474–480Publication Date (Print):March 1, 1987Publication History Published online1 May 2002Published inissue 1 March 1987https://pubs.acs.org/doi/10.1021/ma00169a002https://doi.org/10.1021/ma00169a002research-articleACS PublicationsRequest reuse...
Biobased, biocompatible, and biodegradable poly(lactic acid), PLA, possesses unique properties that give it high potential for a wide range of applications. However, its low thermal stability brittleness are major obstacles use. In this study, both the toughness PLA were simultaneously improved via stereocomplexation reactive blending, by generating alloys composed two enantiomers, PLLA PDLA, together with poly(ethylene-ran-methylacrylate–ran-glycidyl methacrylate), EMA-GMA. It was found...
We developed flexible polymeric "heat-guiding materials" by simply drawing bacterial cellulose (BC) hydrogels to align the nanofibers and form "nanopapers" with anisotropic thermal conductivity. The in-plane anisotropy of conductivity between drawn transverse directions increased as draw ratio increased. For BC nanopapers, coefficient expansion was found be inversely correlated diffusivity. fabricated a planar spiral sheet assembling strips visualize "heat flux controllability". coexistence...
Thermally conductive and optically transparent flexible films were fabricated using nanocellulose skeletons with acrylic resin.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of hydrophobic interaction in the poly(methacrylic acid)/pyrene end-labeled poly(ethylene glycol) complexHideko Tamaru Oyama, Wing T. Tang, and Curtis W. FrankCite this: Macromolecules 1987, 20, 8, 1839–1847Publication Date (Print):August 1, 1987Publication History Published online1 May 2002Published inissue 1 August 1987https://pubs.acs.org/doi/10.1021/ma00174a024https://doi.org/10.1021/ma00174a024research-articleACS PublicationsRequest...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of the degree ionization poly(methacrylic acid) on complex formed with pyrene end-labeled poly(ethylene glycol)Hideko Tamaru Oyama, David J. Hemker, and Curtis W. FrankCite this: Macromolecules 1989, 22, 3, 1255–1260Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published inissue 1 March 1989https://pubs.acs.org/doi/10.1021/ma00193a042https://doi.org/10.1021/ma00193a042research-articleACS...
Theoretical and experimental studies in the literature on coupling between functionalized polymer chains at immiscible polymer−polymer interfaces have always involved second-order kinetics. In addition, time dependence of degree copolymer formation has been predicted to vary depending reaction stage. However, basis careful reanalysis actual orders published work our own experiments polyamide (aPA)/polysulfone (PSU) system, it is demonstrated that pseudo-first-order kinetics parameter (Σ* −...
The relationship between the interface structure and macroscopic properties of composites composed isotactic polypropylene (iPP) magnesium hydroxide (MH) was investigated with a focus on mechanical properties, thermal stability, flame retardancy. Surface treatment MH carried out using dodecanoic acid (DA) dodecylphosphate (DP), both which interacted to form submonolayer coverages. Fourier transform infrared spectroscopy (FTIR) X-ray photoelectron (XPS) revealed that organic reagents adhere...
Although poly(l-lactic acid) (PLLA) is reputed to be biodegradable in the human body, its hydrophobic nature lets it persist for ca. 5.5 years. This study demonstrates that biologically safe lactide copolymers, poly(aspartic acid-co-l-lactide) (PAL) and poly(malic (PML), dispersed PLLA function as detonators (triggers) hydrolytic degradation under physiological conditions. The copolymers significantly enhance hydrolysis, consequently, rate of becomes easily tunable by controlling amounts PAL...
Setsuro Tamaru was my grandfather. He worked with Fritz Haber in Germany on researching the ammonia synthesis process and contributed substantially to development of scientific research education Japan. Although I had never met him, felt his existence while grew up, since our house built by him many artifacts brought back from grandfather; e.g., a Bechstein upright piano upon which practiced every day Haber's portrait handwritten message hung wall. This is an account grandfather's life,...
The objectives of this work were to characterize the surface commercial carbon fibers, focusing on effect polymer sizing and oxygen radiofrequency plasma treatment. fiber composition was determined by x-ray photoelectron spectroscopy (XPS) topography examined scanning transmission electron microscopy (STEM) atomic force (AFM). Voltage-contrast XPS distinguished between unsized sized which former behaved as a conductive material whereas latter mixture both non-conductive materials due...
The coupling reaction at the immiscible polymer−polymer interface formed between bilayer films composed of amorphous polyamide (aPA) and polysulfone (PSU) incorporating different functional groups was monitored by X-ray photoelectron spectroscopy (XPS). overall consistent with pseudo-first-order kinetics, process controlled situated interface. Anhydride attached to PSU, both phthalic anhydride maleic anhydride, showed significantly faster higher reactivities than epoxide triazine in primary...
Abstract In this study, novel biodegradable materials were successfully generated, which have excellent mechanical properties in air during usage and storage, but whose structure easily disintegrates when immersed water. The prepared by melt blending poly( L ‐lactic acid) (PLLA) poly(butylene adipate‐ co ‐terephthalate) (PBAT) with a small amount of oligomeric poly(aspartic acid‐ ‐lactide) (PAL) as degradation accelerator. behavior the blends was investigated immersing blend films...