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Chemical nucleation of carboxylic salt nucleating agent in poly(ethylene 2,6-naphthalate)
Dimethyl 2, 6-naphthalate ( DMN) and sodium of o-chlorobenzoate ( SOCB) were used as model compounds to simulate the chemical reaction between poly(ethylene naphathalate) (PEN) and carboxylic acid alkali salt; and the reaction was studied by using DSC, polarized optical microscopy with a hot-stage ( HPOM), Fourier transform infrared spectrometry( FTIR) and high performance liquid chromatograp...
http://www.polymer.cnt//ss/rgliu/publicationsshow_3148.html |
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Crystallization and morphology of poly(ethylene 2,6-naphthalene dicarboxylate) containing additives
Full Paper: The influence of nucleating agents (AClyn(R), Surlyng(R) and sodium benzoate (SB)) alone and together with nucleating promoter (Ceraflour(R) 993 and Ceraflour(R) 991 and poly(1,4-butylene sebacate)) on the crystallization and morphology of poly(ethylene 2,6-naphthalene dicarboxylate) (PEN) was investigated by means of differential scanning calorimeter, polarized optical microscopy...
http://www.polymer.cnt//ss/rgliu/publicationsshow_3146.html |
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Influence of additives on the crystal structure and melting behavior of poly(ethylene-2,6-naphthalene dicarboxylate)
The influence of additives on the crystal modification and melting behavior of poly(ethylene-2,6-naphthalene dicarboxylate) (PEN) was investigated with wide-angle X-ray diffraction and differential scanning calorimetry (DSC). The addition of a nucleating promoter, Ceraflour 993, had no effect on the crystal modification and melting behavior of PEN crystallized under all chosen experimental co...
http://www.polymer.cnt//ss/rgliu/publicationsshow_3145.html |
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Crystallization behaviors of poly(ethylene 2,6-naphthalate) in the presence of liquid crystalline polymer
The crystallization behaviors and morphology of poly(ethylene 2,6-naphthalate) (PEN) in the presence of liquid crystalline polymer (LCP) Vectra RD501 have been studied by differential scanning calorimetry (DSC), polarized optical microscopy (POM), atomic force microscopy (AFM), and wide-angle X-ray diffraction (WAXD). It was found that the LCP in PEN/LCP blends accelerates the crystallization ...
http://www.polymer.cnt//ss/rgliu/publicationsshow_3139.html |
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Tailoring Nanowire Network Morphology and Charge Carrier Mobility of Poly(3-hexylthiophene)/C-60 Films
We used solvent-vapor treatment methods to determine nanoscale phase separation and thus tailor the charge mobility of the poly(3-hexylthiophene)/fullerene (P3HT/C-60) blend films. The nanowires obtained by chloroform vapor treatment are rich in C-60, whereas the nanowires obtained by 1,2-dichlorobenzene (DCB) vapor treatment are rich in P3HT. The treated blends offer far superior hole transp...
http://www.polymer.cnt//ss/rgliu/publicationsshow_3136.html |
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65. Dendritic-to-faceted crystal pattern transition of ultrathin poly(ethylene oxide) films
The detailed Tc-sensitive crystal pattern transition from dendrites through fourfold-symmetric structures to faceted crystals of ultrathin poly(ethylene oxide) films has been experimentally observed using atomic force microscopy. The transition has been quantitatively described by the Tc-dependences of the fractal dimension and of the velocity ratio caused by forward and transverse growths i...
http://www.polymer.cnt//ss/wangwei/publicationsshow_3096.html |
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33. Two-step photo-degradation process of poly(ethylene terephthalate)
After investigating kinetics of the UV photodegradation of PET film samples having a thickness of 4.4 µm, we found that the photodegradation process takes place in two steps: a very rapid initial step followed by a normal step. This phenomenon is explained by using a concept of “weak links.” We have obtained the rate constants of degradation of the “normal links”...
http://www.polymer.cnt//ss/wangwei/publicationsshow_3061.html |
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29. Surface nature of UV deterioration in properties of solid poly(ethylene terephthalate)
We investigated the changes in the molecular weight and also in the mechanical properties with the distance to the exposed surface of the irradiated stacked poly(ethylene terephthalate) (PET) film samples. A relation between the molecular weight and the mechanical properties of the irradiated PET was established. The relation demonstrates that the decrease in molecular weight is one of the ma...
http://www.polymer.cnt//ss/wangwei/publicationsshow_3055.html |
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12. Partial phase diagram of poly(p-phenylene terephthalamide) copolymers in sulfuric acid
Copolyaramides with 2,5-di-n-hexyl terephthalic acid residues as comonomers were synthesized. Partial phase diagrams were measured for mixtures with concentrated sulfuric acid in the range between 8 and 20% w/w of polymer. Lyotropic phases were observed, but in comparison to homopoly(p-phenylene terephthalamide) the clearing temperatures are lower and the critical concentrations for the forma...
http://www.polymer.cnt//ss/wangwei/publicationsshow_3038.html |
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Synthesis and phase transition of cellulose-graft-poly(ethylene glycol) copolymers
Cellulose-graft-poly(ethylene glycol) copolymers were synthesized, and the thermal properties of the copolymers were investigated. The cellulose-graft-poly(ethylene glycol) copolymers showed solid-solid phase-transition behavior with a high thermal storage density and good thermal stability in the temperature region of 25-250 degrees C. The phase-transition temperature and enthalpy of the cel...
http://www.polymer.cnt//ss/rgliu/publicationsshow_2963.html |
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