| |
Molecular Mobility and Glass Transition of Thin Films of Poly(bisphenol A carbonate)
Glass transition behavior of thin poly(bisphenol A carbonate) (PBAC) films capped between two aluminum (Al) layers is investigated by means of dielectric expansion dilatometry and dielectric relaxation spectroscopy accompanied by contact angle measurements. The thermal glass transition temperature is more or less independent of the film thickness down to 20 nm. For thickness below 20 nm, an i...
http://www.polymer.cnt//ss/hjyin/publicationsshow_3637.html |
| |
Fabrication of Polylactide/Poly(ε-caprolactone) Blend Fibers by Electrospinning: Morphology and Orientation
Industrial & Engineering Chemistry Research, 2012, 51, 3682-3691.
ABSTRACT:
Randomly-oriented fiber mats and well-aligned fiber bundles of the biodegradable polylactide (PLA)/poly(?-caprolactone) (PCL) blends were successfully produced by electrospinning in the present study. For the reticulate fibers, the effects of blending ratio of two polymers and compositions of mixed solvents on fiber...
http://www.polymer.cnt//ss/wudefeng/publicationsshow_3616.html |
| |
Interfacial Properties, Viscoelasticity and Thermal Behaviors of Poly(butylene succinate)/Polylactide Blend
Industrial & Engineering Chemistry Research, 2012, 51, 2290–2298
ABSTRACT:
Biodegradable poly(butylene succinate)/polylactide (PBS/PLA) blends with various blending ratios were prepared by melt mixing for morphological and rheological studies. Dynamic rheological measurements were performed on the blend systems and the viscoelastic responses were analyzed with several emulsion models....
http://www.polymer.cnt//ss/wudefeng/publicationsshow_3514.html |
| |
“Physical Aging Enhanced Mesomorphic Structure in Melt-Quenched Poly(L-lactic acid)”
The structural evolutions and kinetics of melt-quenched poly(l-lactic acid) (PLLA) during the process of isothermal physical aging below the glass transition temperature (Tg) were investigated by time-resolved infrared spectroscopy. The results show that local ordered structure is developed with aging time. Such local ordered structure shows the same characteristic band at 918 cm–1 as that o...
http://www.polymer.cnt//ss/zhangjianming/publicationsshow_3478.html |
| |
152. Facile preparation of poly(vinyl alcohol) nanocomposites with pristine layered double hydroxides.
In this paper, nano-sized Mg-Al layered double hydroxide (LDH) was synthesized by a fast nucleation and slow aging method. The structures of LDH were characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM) and photon correlation spectroscopy (PCS). Poly(vinyl alcohol) (PVA) nanocomposites with different LDH loadings were prepared by water solution casting method. TEM...
http://www.polymer.cnt//ss/liutianxi/publicationsshow_3387.html |
| |
Composite Thin Film by Hydrogen-Bonding Assembly of Polymer Brush and Poly(vinylpyrrolidone)
Based on hydrogen-bonding layer-by-layer (LBL) assembly in aqueous solution, poly(vinylpyrrolidone) (PVPON) and a spherical polymer brush with a poly(methylsilsesquioxane) (PSQ) core and poly(acrylic acid) (PAA) hair chains were used to fabricate composite multilayer thin films. Hydrogen bonding as the driving force was confirmed by FT-IR spectrometry. A simple method (Filmetric F20) was introduce...
http://www.polymer.cnt//ss/zhangyongjun/publicationsshow_3303.html |
| |
Stability of Hydrogen-bonded Hydroxypropylcellulose /Poly(acrylic acid) Microcapsules in Aqueous Solutions
Hydroxypropylcellulose (HPC), a cellulose derivative, and poly(acrylic acid) (PAA) were assembled onto colloidal SiO2 particles in acidic solutions in a layer-by-layer manner, using hydrogen bonding as the driving force. Monodisperse hollow microcapsules were prepared by the removal of the sacrificial template. Long-term stability of the hydrogen-bonded capsules under various conditions was ...
http://www.polymer.cnt//ss/zhangyongjun/publicationsshow_3275.html |
| |
Polyoxometalate-modulated self-assembly of polystyrene-block-poly-(4-vinylpyridine)
Polyoxometalates can serve as active components to induce and modulate the micellization behavior of polystyrene-block-poly-(4-vinylpyridine).
http://www.polymer.cnt//ss/xiankunlin/publicationsshow_3243.html |
| |
Mechanism of degradation of poly(p-phenylene benzobisoxazole) under hydrolytic conditions
Poly(p-phenylene benzobisoxazole) (PBO) fiber has received great interest because of its excellent mechanical properties and good thermal stability. The objective of this study was to expose degradation mechanism of PBO under neutral and acidic conditions by molecular mass and Fourier transform infrared (FTIR) spectroscopy. Results were not consistent with the classic degradation mechanism, which ...
http://www.polymer.cnt//ss/liuxiaoyun/publicationsshow_3225.html |
| |
Synthesis and Properties of Crystalline Dicarboxylated Poly(L-lactic acid) Prepolymers
Crystalline dicarboxylated poly(L-lactic acid)s
(dcPLLAs) with number-average molecular weights (Mn’s) of
103 to 104 g/mol were synthesized via the melt polycondensation
of L-lactic acid (LLA) in the presence of succinic anhydride
(SAD), with tin(II) chloride and toluene-4-sulfonic acid
as binary catalysts. They were characterized by end-group titration,
1H-NMR, differential scanning c...
http://www.polymer.cnt//ss/wulinbo/publicationsshow_3154.html |
| |