A5087306374- Polymer crystallization and properties
- Polymer Nanocomposites and Properties
- Polymer composites and self-healing
- Graphene research and applications
- Epoxy Resin Curing Processes
- Lignin and Wood Chemistry
- Carbon Nanotubes in Composites
- biodegradable polymer synthesis and properties
- Synthesis and properties of polymers
- Fiber-reinforced polymer composites
- Advanced Cellulose Research Studies
- Rheology and Fluid Dynamics Studies
- Polymer Foaming and Composites
- Synthesis of Organic Compounds
- Block Copolymer Self-Assembly
- Organometallic Complex Synthesis and Catalysis
- Advanced Polymer Synthesis and Characterization
Beijing Academy of Science and Technology
2024
University of Chinese Academy of Sciences
2013-2021
Beijing National Laboratory for Molecular Sciences
2013-2021
Chinese Academy of Sciences
2014-2021
Institute of Chemistry
2013-2021
State Key Laboratory of Polymer Physics and Chemistry
2013-2014
Two high-degree long-chain-branched polypropylenes (LCB-PPs), one being homopolymer and the other random copolymer (with a minor composition of ethylene), were prepared in industrial trials by Ziegler–Natta catalysis with ω-alkenylmethyldichlorosilane-mediated successive polymerization-hydrolysis chemistry. They then melt-blended common PP resins, respectively. The compositional ratios (weight percentage ratio, LCB-PP/common PP) blends controlled broad range, from 20/80 to 80/20, each...
Polyethylene (PE) synthesized by Ziegler–Natta catalysts (MgCl2/TiCl4 catalysts) lack long-chain branching (LCB) structure, which to a great extent limits their end uses. In this paper, we report an in situ methodology of incorporating LCB structure into PE catalysts. The chemistry centers on bifunctional reagent, ω-alkenylmethyldichlorosilane, where the reagent is first copolymerized with ethylene anchor some polymer chains pendant alkylmethyldichlorosilane groups, then upon treating water...
Abstract Epoxy/polysufone (PSF) composites cured with 4,4'‐diaminodiphenyl sulfone (DDS) and methane (DDM) were fabricated, the effect of dual curing reaction diamines epoxy on morphology, mechanical, thermal performance was investigated. DSC results indicated that DDM more reactive than DDS activation energy decreased rising content. Structures small domain size at early stage phase separation fixed by fast epoxy‐DDM reaction. When content elevated to a high level, large structures changed...
This paper showcases a new type of polyolefin nanocomposite where nonolefinic organic thermoplastic polymers serve as nanoscale reinforcements for polyolefins. On the basis polypropylene/multiwalled carbon nanotubes (PP/MWCNTs) nanocomposites synthesized by in situ propylene polymerization, nanotubes-graft-polystyrene (PP/MWCNTs-g-PS) were obtained graft polymerization styrene on surfaces MWCNT with atom transfer radical (ATRP) mechanism. Confined MWCNTs, grafted PS formed nanoparticles and...
Increasing of rubber content in isotactic polypropylene/ethylene-propylene (iPP/EPR) alloys can extend the applications this kind polyolefin. The EPR and phase structure polypropylene multicomponents have great effect on viscoelasticity mechanical properties. iPP/EPR in-reactor with a high were obtained through situ crosslinking chains α,ω-diene. morphological observation results indicate that crosslinked good spherical shape clean rough external surfaces. is finely dispersed areas ranging...
ABSTRACT To improve the reactivity and compatibility of lignin, it was first functionalized via method epoxidation. The epoxidized lignin (LEP) modified epoxy resin with good mechanical shape memory performance fabricated ingeniously by introducing LEP into homogeneously aid synergistic dispersion crosslinking polyetheramine without using organic solvents. effect addition on curing reaction, thermal, mechanical, were intensively evaluated. epoxy‐diamine reaction promoted incorporation,...
ABSTRACT Significant effect of cellulose nanofibers (CNFs) on cure‐induced phase separation in dynamically asymmetric system is reported. An epoxy/polysulfone blends with typical layered structure formation was chosen as the polymer matrix, and morphology evolution rheological behavior systems different nano‐size fiber loadings upon curing reaction were investigated using optical microscopy measurement. CNF distributed uniformly matrix had good interaction chains. Curing epoxy promoted by...