Ruihua Cheng
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View article: Crystallization Improvement of PLA by the Talc with “Grafting from” Method of Polymerization of Lactide
Crystallization Improvement of PLA by the Talc with “Grafting from” Method of Polymerization of Lactide Open
The slow crystallization rate of polylactic acid (PLA) hampers its applications. By the “grafting from” method, a modified talcum powder (Talc-g-pla) was synthesized by the ring-opening polymerization (ROP) of lactide in bulk. The polymer …
View article: CCDC 2221051: Experimental Crystal Structure Determination
CCDC 2221051: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Ritter-type amination of C(sp3)-H bonds enabled by electrochemistry with SO42−
Ritter-type amination of C(sp3)-H bonds enabled by electrochemistry with SO42− Open
By merging electricity with sulfate, the Ritter-type amination of C(sp 3 )-H bonds is developed in an undivided cell under room temperature. This method features broad substrate generality (71 examples, up to 93% yields), high functional-g…
View article: Effect of Contact Angle Hysteresis on Evaporation Dynamics of a Sessile Drop on a Heated Surface
Effect of Contact Angle Hysteresis on Evaporation Dynamics of a Sessile Drop on a Heated Surface Open
Contact angle hysteresis (CAH) is a significant factor affecting the drop motion on solid substrates. A model of CAH is introduced to explore the influence of CAH on the dynamics of a sessile drop on a uniformly heated surface, and a two-d…
View article: Iridium-catalyzed enantioselective synthesis of chiral γ-amino alcohols and intermediates of (S)-duloxetine, (R)-fluoxetine, and (R)-atomoxetine
Iridium-catalyzed enantioselective synthesis of chiral γ-amino alcohols and intermediates of (S)-duloxetine, (R)-fluoxetine, and (R)-atomoxetine Open
Chiral γ-amino alcohols are the prevalent structural motifs and building blocks in pharmaceuticals and bioactive molecules. Enantioselective hydrogenation of β-amino ketones provides a straightforward and powerful tool for the synthesis of…
View article: Copolyesters of ε-caprolactone and <scp>l</scp>-lactide catalyzed by a tetrabutylammonium phthalimide-<i>N</i>-oxyl organocatalyst
Copolyesters of ε-caprolactone and <span>l</span>-lactide catalyzed by a tetrabutylammonium phthalimide-<i>N</i>-oxyl organocatalyst Open
By utilizing tetrabutylammonium phthalimide-N-oxyl organocatalyst, copolymer PCLA with Mn over 20 000 g mol−1 was synthesized by sequential ring-opening polymerization of ε-caprolactone and l-lactide under bulk condit…
View article: Insights into the effect of vanadium on chromium-vanadium Phillips catalysts for the ethylene polymerization
Insights into the effect of vanadium on chromium-vanadium Phillips catalysts for the ethylene polymerization Open
The chromium/vanadium bimetallic Phillips catalysts developed by our research group have been proved to be a promising process to produce bimodal polyethylene using a single-reactor process. The vanadium loading of CrV-1/1…
View article: Fast cyclotrimerization of a wide range of isocyanates to isocyanurates over acid/base conjugates under bulk conditions
Fast cyclotrimerization of a wide range of isocyanates to isocyanurates over acid/base conjugates under bulk conditions Open
An array of organic bases DMAP (4-dimethylaminopyridine), DBU (1, 8-diazabicyclo [5.4.0] undec-7-ene), TBD (1, 5, 7-triazabicyclo [4.4.0] dec-5-ene), and their base/acid conjugate organocatalyst systems were evaluated in the trimerization …
View article: A Complexed Initiating System AlCl3·Phenetole/TiCl4·H2O with Dominant Synergistic Effect for Efficient Synthesis of High Molecular Weight Polyisobutylene
A Complexed Initiating System AlCl3·Phenetole/TiCl4·H2O with Dominant Synergistic Effect for Efficient Synthesis of High Molecular Weight Polyisobutylene Open
A complexed initiating system AlCl3·phenetole/TiCl4·H2O was prepared by simply compounding AlCl3/phenetole and TiCl4/H2O and used for cationic polymerization of isobutylene. It was found AlCl3·phenetole/TiCl4·H2O exhibited activities 1.2–3…
View article: CCDC 1946331: Experimental Crystal Structure Determination
CCDC 1946331: Experimental Crystal Structure Determination Open
View article: How can pH value during catalyst preparation affect the performance of vanadium-modified (SiO2/MgO/ MgCl2)•TiClx Ziegler-Natta polyethylene catalysts
How can pH value during catalyst preparation affect the performance of vanadium-modified (SiO2/MgO/ MgCl2)•TiClx Ziegler-Natta polyethylene catalysts Open
Vanadium-modified (SiO2/MgO/MgCl2)•TiClx Ziegler-Natta catalysts were prepared through co-impregnation of water-soluble magnesium and vanadium salts under different pH values. Several key factors such as pH value of co-impregnation solutio…
View article: Effects of Ti/Mg molar ratio on bi-supported SiO2/MgCl2 (ethoxide type)/TiCl4 catalysts in ethylene homopolymerization and ethylene/1-hexene copolymerization
Effects of Ti/Mg molar ratio on bi-supported SiO2/MgCl2 (ethoxide type)/TiCl4 catalysts in ethylene homopolymerization and ethylene/1-hexene copolymerization Open
SiO2/MgCl2 (ethoxide type)/TiCl4 Ziegler-Natta catalysts for use in ethylene polymerization and ethylene/1-hexene copolymerization have been prepared using silica with a supported layer of magnesium ethoxide (Mg(OEt)2) as a catalyst precur…
View article: Introduction of titanium species into fluorine-modified SiO2- supported Cr-V bimetallic catalyst for ethylene polymerization and ethylene/1-hexene copolymerization
Introduction of titanium species into fluorine-modified SiO2- supported Cr-V bimetallic catalyst for ethylene polymerization and ethylene/1-hexene copolymerization Open
Chromium-vanadium (Cr-V) bimetallic catalysts are prepared by the introduction of vanadium into the Phillips catalyst which is one of the most significant industrial ethylene polymerization catalysts for tuning the Phillips catalyst perfor…
View article: Effect of supercritical CO<sub>2</sub> on the copolymerization behavior of cyclohexene oxide/CO<sub>2</sub> and copolymer properties with DMC/Salen‐Co(III) catalyst system
Effect of supercritical CO<sub>2</sub> on the copolymerization behavior of cyclohexene oxide/CO<sub>2</sub> and copolymer properties with DMC/Salen‐Co(III) catalyst system Open
The copolymerization of cyclohexene oxide (CHO) and carbon dioxide (CO 2 ) was carried out under supercritical CO 2 (scCO 2 ) conditions to afford poly (cyclohexene carbonate) (PCHC) in high yield. The scCO 2 provided not only the C1 feeds…
View article: Imido-modified SiO2-supported Ti/Mg Ziegler-Natta catalysts for ethylene polymerization and ethylene/1-hexene copolymerization
Imido-modified SiO2-supported Ti/Mg Ziegler-Natta catalysts for ethylene polymerization and ethylene/1-hexene copolymerization Open
A novel imido-modified SiO2-supported Ti/Mg Ziegler-Natta catalyst for ethylene and ethylene/1-hexene polymerization is investigated. The catalyst is prepared by modification of (SiO2/MgO/MgCl2)TiClx Ziegler-Natta catalysts via supporting …