201611-85-0Relevant articles and documents
Dispersion polymerisation in supercritical CO2 using macro-RAFT agents
Zong, Mengmeng,Thurecht, Kristofer J.,Howdle, Steven M.
, p. 5942 - 5944 (2008)
Fluorinated macro-RAFT agents can act as in situ stabilisers while exhibiting good control over block copolymers formed by dispersion polymerisation in supercritical CO2 to yield well-defined spherical particles with a fluorinated "halo". The Royal Society of Chemistry.
Design, synthesis, and phase behaviors of a novel triphenylene-based side chain liquid crystalline diblock copolymer
Ban, Jianfeng,Pan, Lulu,Shi, Bo,Zhang, Hailiang
, p. 13581 - 13588 (2018)
A novel double Tp-based liquid crystalline (LC) diblock copolymer (PMTS-b-PMT6S) composed of poly[3,6,7,10,11-pentakis (hexyloxy)-2-oxytriphenylene] (PMTS) and poly{6-[3,6,7,10,11-pentakis(hexyloxy)-2-oxytriphenylene]} (PMT6S) was designed and successfully synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization. While PMTS is a rigid columnar-shaped (ΦN) polymer, PMT6S is a stable hexagonal columnar phase (ΦH) polymer. The phase behaviors of diblock copolymers were studied by DSC, POM and 1D WAXD. The results showed that the weight fraction of PMT6S (fPMT6S) has a significant effect on the LC phase behaviors and phase structures of diblock copolymers. Both glass transition temperature and phase transition temperature of the diblock copolymers from LC phase to isotropic phase reduced with the weight fraction of PMT6S in the feed. When the fPMT6S ≤ 58.1%, PMTS-b-PMT6S-1 to PMTS-b-PMT6S-3 show similar properties to PMTS, which formed a stable columnar nematic phase (ΦN), while when the fPMT6S ≥ 64.2%, PMTS-b-PMT6S-4 and PMTS-b-PMT6S-5 show similar properties to PMT6S, which presented a hexagonal symmetry columnar phase (ΦH). Comparison between the diblock copolymer and homopolymer (PMTS and PMT6S) indicates that the content of the spacer was crucial to determine the LC structures. Through the study one can better understand the interrelation of microstructures and Tp DLC orders, which constitutes the key basis for various applications.
A novel synthesis of functional dithioesters, dithiocarbamates, xanthates and trithiocarbonates
Thang, San H.,Chong, Bill Y.K.,Mayadunne, Roshan T.A.,Moad, Graeme,Rizzardo, Ezio
, p. 2435 - 2438 (1999)
A novel synthesis of functional dithioesters, dithiocarbamates, xanthates and trithiocarbonates is described. Heating a bis(thiocarbonyl) disulfide with an azo-compound results in the formation of (thiocarbonyl)sulfanyl derivatives in moderate to high yield. The process is proposed as the method of choice for preparing tertiary (thiocarbonyl)sulfanyl compounds and is compatible with a wide range of functionalities (e.g. carboxy, hydroxy and nitrile).
Fluorescent and Water Dispersible Single-Chain Nanoparticles: Core–Shell Structured Compartmentation
Hoffmann, Justus F.,Roos, Andreas H.,Schmitt, Franz-Josef,Hinderberger, Dariush,Binder, Wolfgang H.
supporting information, p. 7820 - 7827 (2021/03/01)
Single-chain nanoparticles (SCNPs) are highly versatile structures resembling proteins, able to function as catalysts or biomedical delivery systems. Based on their synthesis by single-chain collapse into nanoparticular systems, their internal structure is complex, resulting in nanosized domains preformed during the crosslinking process. In this study we present proof of such nanocompartments within SCNPs via a combination of electron paramagnetic resonance (EPR) and fluorescence spectroscopy. A novel strategy to encapsulate labels within these water dispersible SCNPs with hydrodynamic radii of ≈5 nm is presented, based on amphiphilic polymers with additional covalently bound labels, attached via the copper catalyzed azide/alkyne “click” reaction (CuAAC). A detailed profile of the interior of the SCNPs and the labels’ microenvironment was obtained via electron paramagnetic resonance (EPR) experiments, followed by an assessment of their photophysical properties.
Tert-amyl methyl ether preparation method and light gasoline modification method
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Paragraph 0087; 0089, (2018/06/14)
The invention discloses a tert-amyl methyl ether preparation method and a light gasoline modification method. The tert-amyl methyl ether preparation method comprises that methanol and isopentene contact an etherification catalyst under an etherification reaction condition to obtain the reaction product containing tert-amyl methyl ether, wherein the etherification catalyst is a polymer supported ionic liquid catalyst, and has a structure represented by a formula (I) or a formula (II). With the method of the present inventin, the tert-amyl methyl ether preparation reaction can maintain the highreactivity.
