A5069146008- biodegradable polymer synthesis and properties
- Polymer Nanocomposites and Properties
- Polymer crystallization and properties
- Advanced Polymer Synthesis and Characterization
- Photopolymerization techniques and applications
- Silicone and Siloxane Chemistry
- Synthesis and properties of polymers
- Analytical Chemistry and Chromatography
- Flame retardant materials and properties
- Polymer Science and PVC
- Polysaccharides Composition and Applications
- Polysaccharides and Plant Cell Walls
- Surfactants and Colloidal Systems
- Analytical Chemistry and Sensors
- Silk-based biomaterials and applications
- Nanocomposite Films for Food Packaging
- Drug Solubulity and Delivery Systems
- Microplastics and Plastic Pollution
- Hydrogels: synthesis, properties, applications
- Advanced Sensor and Energy Harvesting Materials
- Polymer Nanocomposite Synthesis and Irradiation
- Aluminum Alloys Composites Properties
- Asphalt Pavement Performance Evaluation
- Protein Interaction Studies and Fluorescence Analysis
- Bone Tissue Engineering Materials
Guangdong University of Technology
2008-2022
Sun Yat-sen University
2007-2011
Lac Courte Oreilles Ojibwa Community College
2011
Chinese Academy of Sciences
2011
Nanning Normal University
2005
Photoinduced energy transfer in poly(trimethylene terephthalate) (PTT) was investigated by examining its excitation wavelength and concentration dependences of fluorescence solutions. Accordingly, critical quench trap formation were identified. Besides, studies temperature effect on photoluminescence (PL) behavior amorphous PTT film from −183 to +177 °C revealed that both phosphorescence emissions at low can be attributed monomers traps. Phosphorescence quenching originated the discontinuous...
Dynamic processes of isothermally cold-crystallized poly(trimethylene terephthalate) (PTT) was investigated by fluorescence spectroscopy its amorphous region. The key issue lay in the fact that emission at 390 nm originating from main chain phenylene ring phase correlated to cold-crystallization. A reduction this peak intensity corresponded a gradual transition crystal Accordingly, molecular movement and structure evolution PTT course cold-crystallization were carefully revealed....
The dynamic process of cold crystallization amorphous poly(trimethylene terephthalate) (PTT) was investigated with resonance light scattering (RLS). By using an enhanced peak at 329 nm, which in close proximity to the absorption band PTT film, density fluctuation due gradual transition from crystalline increasing temperature monitored. Accordingly, molecular chains movement and structure evolution during crystallization, particular, information about each phase including induction,...
Abstract A series of random copolymers were synthesized by the bulk polycondensation dimethyl terephthalate with ethylene glycol (EG) and propane‐1,3‐diol (PDO) in various compositions. Their composition thermal properties investigated. The 57.7 mol % or more PDO 14.4 less crystallizable, but those 36–46.2 amorphous. nonisothermal crystallization behavior was investigated varying cooling rates DSC. Poly(ethylene terephthalate) (PET) poly(trimethylene (PTT) homopolymers have relatively lower...
Abstract The novel silicone‐modified polyacrylate reactive diluents for UV/moisture dual‐curable coatings were synthesized from N,N ‐bis[3‐(trimethoxysilyl)propyl]amine and multifunctional acrylates such as ethoxylated trimethylolpropane triacrylate polyethyleneglycol diacrylate through Michael addition reaction. Their structures characterized by NMR FTIR their average molecular weights determined vapor pressure osmometry. With FTIR, it was found that the obtained could be cured both UV...
Abstract The dynamic rheology and morphology of poly(trimethylene terephthalate) maleic anhydride grafted poly(ethylene octene) composites were investigated. A specific viscoelastic phenomenon, that is, a second plateau, appeared at low frequencies exhibited certain dependence on the content elastomer particles temperature. This phenomenon was attributed to formation an aggregation structure rubber particles. analyses functions suggested heterogeneity enhanced as particle or temperature...
Abstract Uracil derivatives are potential nontoxic thermal stabilizers of poly(vinyl chloride) (PVC) and have a better stabilization effect. 5,6‐diamino‐1,3‐dimethyluracil (DDU) was investigated as stabilizer for PVC. The effect DDU measured by thermogravimetric analysis, aging test, recording the time color change Congo red paper (Congo test). Meanwhile, processability PVC stabilized through dynamic performance test. results showed stabilizing compared with calcium stearate (CaSt 2 ) zinc...
High strength Bombyx mori silk fibroin (SF) and hydroxyapatite (HA) composite scaffold was obtained by using co-precipitation salt fractionation method.SEM mechanical test were used to investigate the structure properties of scaffolds.The results showed that when content NaCl 10wt%, scaffolds performed best (compressive strengths modulus), which reached 12MPa 598MPa, respectively.The SEM suggested composites present porous morphologies structure.
The phase structure of blends consisting polyvinyl chloride (PVC) and methyl methacrylate—butadiene—styrene graft copolymer (MBS) are examined by small-angle-X-ray scattering (SAXS). interface layer thickness (σ), correlation distance (a c ), specific surface area (S sp ) calculated using Debye—Bueche's statistical theory. results show that the grafted sequence styrene or methacrylate to butadiene—styrene have significant influence on values σ, a , S . σ-value PVC/MBS in which is first MBS...
Poly(vinyl chloride) (PVC) has been widely used in many fields due to its excellent comprehensive properties, although thermal stability is poor. In the article, a urea derivative, cyanoacetylurea, prepared and structure characterized by means of FTIR 1H-NMR. The stabilization effect cyanoacetylurea on PVC evaluated thermogravimetric analysis (TGA), aging test Congo red test. Meanwhile, processability stabilized investigated through dynamic performance Compared with calcium stearate (CaSt2)...
A fully degradable PLA/starch composite was prepared by one-step in-situ compatibilization method. The effects of raw materials ratio and maleic anhydride （MAH） dosage were studied thermogravimetric analyzer (TG) scanning electron microscopy (SEM). thermal stability microstructure the composites investigated, non-isothermal decomposition kinetics discussed. DTG results show that there are two distinct maximum rate peaks in unmodified composites. After MAH is added, close to each other. In...
Abstract The nonisothermal cold crystallization of PTT films is studied by means SFS. Detailed information on the glass transition and different stages presented. Crystallization kinetics activation energy obtained from SFS are in good agreement with values determined DSC. results show that a simple, sensitive, selective situ method for determining structure/dynamics relationships during relaxation polymers. overcomes drawbacks conventional methods combines advantages resonance light...