Functional π-Gelators and Their Applications

https://ir.nctu.edu.tw:443/bitstream/11536/14909/1/000297489400002.pdf

POSS related polymer nanocomposites

Composites science and technology

PLA composites: From production to properties

I am really glad to have this opportunity to write to you, specially about a subject in which I have worked for half a century. When I was your age, if somebody had told me that I would be working in chemistry of materials most of my life, I would not have believed it. At that time, chemistry of materials meant studying something about cement, steel, sand and asbestos. It was indeed dull. I never didwell in school and college exams on questions related to this subject. Much later in my life, I got greatly interested in the subject for various reasons. First, inmy study of chemistry, I was influenced by Linus Pauling who ismy academic grandfather. His book titled ‘Nature of the Chemical Bond’ which I read when I was young made a great impression. It taught me how the structure of molecules and materials is an extremely important aspect of chemistry, and how the understanding of structure and bonding provides a basis to understand chemistry and to do new chemistry. It is because of this terrific inspiration that I started studying chemistry. It was clear at the end of my undergraduate career that I wanted to be a chemist.

Chemistry of materials

Synergistic effect between expandable graphite and ammonium polyphosphate on flame retarded polylactide

A novel phosphazene cyclomatrix network polymer: Design, synthesis and application in flame retardant polylactide

Melamine-modified montmorillonite (MA-MMT) was prepared via cation exchange. The intercalation behavior was investigated by Fourier transform infrared spectrometer (FT-IR), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). The results showed that the d-spacing value increased from 1.25 nm for Na-montmorillonite (Na+MMT) to 1.53 nm for MA-MMT. Different kinds of montmorillonite combined with melamine pyrophosphate (MPP) were used to prepare flame-retardant polyamide 6 (FR-PA6). Flame retardance of FR-PA6 samples was investigated by limiting oxygen index (LOI), UL-94 vertical burning method, and cone calorimeter test. Morphology and component of char residues for FR-PA6 were investigated by scanning electron microscope (SEM) and XPS. It was found that MA-MMT/MPP system contributed both excellent flame retardance and anti-dripping ability for PA6. MA-MMT particles can fill flaws of char residues and strengthen the char layer, leading to form more intumescent char layer. POLYM. ENG. SCI., 2011. © 2010 Society of Plastics Engineers

intumescent flame retardation of melamine-modified montmorillonite on polyamide 6: enhancement of condense phase and flame retardance

The invention discloses a high-electric conductivity aromatic polymer ionic liquid diaphragm material and a preparation method thereof. The high-conductivity aromatic polymer ionic liquid diaphragm material comprises an cation and an anion, wherein the cation is a composite cation formed by combining at least one ion of hydrogen ions or metal ions with organic molecules; and the anion is a fluorine-contained sulfonic acid anion or a fluorine-contained sulfimide anion which is connected to an aromatic benzene ring-contained polymer side chain. Compared with the prior art, the polymer ionic liquid diaphragm material of the invention has the advantages of difficult loss of ionic liquid, electric conductivity without depending on water, penetration resistance of OH-anion, methanol or vanadium ions, and the like, can form a stable ion channel which has high ionic activity, high chemical stability, low ion activating energy and easy adsorption of organic polar solvents and is an ideal diaphragm material which can be applied to various fields of lithium ion batteries, secondary lithium ion batteries, methanol fuel batteries, liquid flow batteries, electrodialysis water treatment, atomic energy industry and analysis, catalytic synthesis, chlor-alkali industry, and the like.

High-electric conductivity aromatic polymer ionic liquid diaphragm material and preparation method thereof

Amphiphilic supramolecular miktoarm star copolymers linked by ionic bonds with controlled molecular weight and low polydispersity have been successfully synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization using an ion-bonded macromolecular RAFT agent (macro-RAFT agent). Firstly, a new tetrafunctional initiator, dimethyl 4,6-bis(bromomethyl)-isophthalate, was synthesized and used as an initiator for atom transfer radical polymerization (ATRP) of styrene to form polystyrene (PSt) containing two ester groups at the middle of polymer chain. Then, the ester groups were converted into tertiary amino groups and the ion-bonded supramolecular macro-RAFT agent was obtained through the interaction between the tertiary amino group and 2-dodecylsulfanylthiocarbonylsulfanyl-2-methyl propionic acid (DMP). Finally, ion-bonded amphiphilic miktoarm star copolymer, (PSt)(2)-poly(N-isopropyl-acrylamide)(2), was prepared by RAFT polymerization of N-isopropylacrylamide (NIPAM) in the presence of the supramolecular macro-RAFT agent. The polymerization kinetics was investigated and the molecular weight and the architecture of the resulting star polymers were characterized by means of H-1-NMR, FTIR, and GPC techniques. (c) 2008 Wiley Periodicals, Inc.

Kang Tao

Papers

Synergistic effect between expandable graphite and ammonium polyphosphate on flame retarded polylactide

A novel phosphazene cyclomatrix network polymer: Design, synthesis and application in flame retardant polylactide

intumescent flame retardation of melamine-modified montmorillonite on polyamide 6: enhancement of condense phase and flame retardance

High-electric conductivity aromatic polymer ionic liquid diaphragm material and preparation method thereof

A strategy for synthesis of ion‐bonded amphiphilic miktoarm star copolymers via supramolecular macro‐RAFT agent