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Solution properties and self-association of multi-blocks like copolymer P(AM/AA) prepared by template

ZHANG Yuxi, WU Feipeng, LI Miaozhen, WANG Erjian

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 1,   Pages 68-71 doi: 10.1007/s11705-007-0014-8

Abstract: copolymers (TP) of acrylamide (AM) and acrylic acid (AA) prepared by template copolymerization in aqueous solutionDecreasing the value of pH or adding Ca ion to the copolymer solution will make phase separation occurWith the increase of the pH value of copolymer solution, the changes of the solution viscosity was similarBut the increase range of template copolymer was higher than that of homopolyacrylic acid.TEM images indicated that at the maximal viscosity the copolymer obtained in the presence of template

Keywords： aqueous solution     homopolyacrylic     copolymer solution     significant structure     presence    

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PVDF ultrafiltration membranes of controlled performance via blending PVDF-g-PEGMA copolymer synthesized

Shuai Wang, Tong Li, Chen Chen, Baicang Liu, John C. Crittenden

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 2, doi: 10.1007/s11783-017-0980-0

Abstract: PVDF was blended with the copolymer mixture containing PVDF-g-PEGMA, solvent and residual PEGMA underIn this study, we explored the effect of the copolymer mixture additives with different synthesis timesreaction time of PVDF-g-PEGMA causes more PVDF-g-PEGMA and less residual PEGMA to be found in the casting solutionIncremental PVDF-g-PEGMA can dramatically increase the viscosity of the casting solution.

Keywords： Polyvinylidene fluoride ultrafiltration membrane     Amphiphilic copolymer     Blended modification     High flux    

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Synthesis of a new iron (III) porphyrin acrylate-styrene copolymer and its catalysis for hydroxylation

YU Hancheng, LI Xixian, HUANG Jinwang, JI Liangnian, CHEN Xianli

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 1,   Pages 65-67 doi: 10.1007/s11705-007-0013-9

Abstract: A new iron (III) porphyrin acrylate-styrene copolymer, P[(PorFe)A-S], was synthesized by the reactionby construction of a homophase catalytic system containing the iron (III) porphyrin acrylate-styrene copolymer

Keywords： plasma-atomic emission     UV-Vis     weight determination     acrylate-styrene copolymer     styrene    

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Thermoresponsive block copolymer supported Pt nanocatalysts for base-free aerobic oxidation of 5-hydroxymethyl

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6,   Pages 1514-1523 doi: 10.1007/s11705-021-2092-4

Abstract: thermoresponsive poly(acrylamide-co-acrylonitrile)-b-poly(N-vinylimidazole) block copolymer, with an upper critical solution temperature of about 45 °C.The imidazole groups in the block copolymer were conducive to the improvement of catalytic performancerecovered based on their thermosensitivity by cooling the reaction system below the upper critical solutionGood stability and reusability were observed over these copolymer-immobilized catalysts with no obvious

Keywords： aerobic oxidation     base-free     5-hydroxymethyl-2-furfural     Pt nanoparticle     thermoresponsive block copolymer    

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Effect of styrene-butadiene-styrene copolymer on the aging resistance of asphalt: An atomistic understanding

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5,   Pages 1261-1276 doi: 10.1007/s11709-021-0761-5

Abstract: To reveal the potential influence of styrene-butadiene-styrene (SBS) polymer modification on the anti-aging performance of asphalt, and its mechanism, we explored the aging characteristics of base asphalt and SBS-modified asphalt by reaction force field (ReaxFF) and classical molecular dynamics simulations. The results illustrate that the SBS asphalt is more susceptible to oxidative aging than the base asphalt under oxygen-deficient conditions due to the presence of unsaturated C=C bonds in the SBS polymer. In the case of sufficient oxygen, the SBS polymer inhibits the oxidation of asphalt by restraining the diffusion of asphalt molecules. Compared with the base asphalt, the SBS asphalt exhibits a higher degree of oxidation at the early stage of pavement service and a lower degree of oxidation in the long run. In addition, SBS polymer degrades into small blocks during aging, thus counteracting the hardening of aged asphalt and partially restoring its low-temperature cracking resistance.

Keywords： SBS asphalt     oxidative aging     asphalt hardening     ReaxFF     molecular dynamics    

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Preparation of copolymer-grafted mixed-mode resins for immunoglobulin G adsorption

Shenggang Chen, Tao Liu, Ruiqi Yang, Dongqiang Lin, Shanjing Yao

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 1,   Pages 70-79 doi: 10.1007/s11705-018-1745-4

Abstract: The mixed-mode resins for protein adsorption have been prepared by a novel strategy, copolymer graftingSpecially, the copolymer-grafted resins CG-M-A with two functional groups, 5-amino-benzimidazole (ABImonoclonal antibody from cell culture supernatant are 96.0% and 86.5%, respectively, indicating that copolymer-grafted

Keywords： atom transfer radical polymerization     copolymer-grafting     mixed-mode resin     protein adsorption    

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A review of optimization modeling and solution methods in renewable energy systems

Frontiers of Engineering Management   Pages 640-671 doi: 10.1007/s42524-023-0271-3

Abstract: Web of Science database, this study reviews the decision-making optimization problems, models, and solution

Keywords： renewable energy system     bibliometrics     mathematical programming     optimization models     solution methods    

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Molecular dynamics study of water diffusion in an amphiphilic block copolymer with large difference in

Yang Zhou, Phillip Choi

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 3,   Pages 440-447 doi: 10.1007/s11705-017-1626-2

Abstract: Isothermal-isobaric molecular dynamics simulation was used to study the diffusion mechanism of water in polyurethane- -poly( -isopropyl acrylamide) (PU- -PNIPAm) with a hydrophobic PU/hydrophilic PNIPAm mass ratio of 1.4 to 1 at 298 K and 450 K. Here, the experimental glass transition temperature ( ) of PU is 243 K while that of PNIPAm is 383 K. Different amounts of water up to 15 wt-% were added to PU- -PNIPAm. We were able to reproduce the specific volumes and glass transition temperatures (250 K and 390 K) of PU- -PNIPAm. The computed self-diffusion coefficient of water increased exponentially with increasing water concentration at both temperatures (i.e., following the free volume model of Fujita). It suggested that water diffusion in PU- -PNIPAm depends only on its fractional free volume despite the free volume inhomogeneity. It is noted that at 298 K, PU is rubbery while PNIPAm is glassy. Regardless of temperature, radial distribution functions showed that water formed clusters with sizes in the range of 0.2–0.4 nm in PU- -PNIPAm. At low water concentrations, more clusters were found in the PU domain but at high water concentrations, more in the PNIPAm domain. It is believed that water molecules diffuse as clusters rather than as individual molecules.

Keywords： molecular dynamics simulation     amphiphilic block copolymer     free volume     water diffusivity     fujita model    

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Morphologies of diblock copolymer confined in a slit with patterned surfaces studied by dissipative particle

FENG Jian, HUANG Yongmin, LIU Honglai, HU Ying

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 2,   Pages 132-139 doi: 10.1007/s11705-007-0025-5

Abstract: To overcome this disadvantage, the diblock copolymer confined in a restricted system with a patternedIn this work, the morphologies of a thin film of diblock copolymer confined between patterned and neutralIt is shown that the morphology of the symmetric diblock copolymer is affected by the ratio of the patternperiod on the surface to the lamellar period of the symmetric diblock copolymer and by the repulsionThe lamellar period is also affected by the polydispersity of the symmetric diblock copolymer.

Keywords： weight     nano-fabrication     morphology     matching     dissipative particle    

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Highly selective detection of copper(II) by a “ligand-free” conjugated copolymer in nucleophilic solvents

Weixing Deng, Pengfei Sun, Quli Fan, Lei Zhang, Tsuyoshi Minami

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 1,   Pages 105-111 doi: 10.1007/s11705-019-1791-6

Abstract: The synthesis of -cyclohexyl carbamate-attached fluorene- -phenylene copolymer (PFPNCC) and the usethe mixture of the conjugated polymer and Cu(II) indicate the presence of a reduced Cu(I) ion in the solution

Keywords： ligand-free     fluorescent chemosensor     copper     photo-induced electron transfer    

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Preparation of polysulfone-based block copolymer ultrafiltration membranes by selective swelling and

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 5,   Pages 745-754 doi: 10.1007/s11705-021-2038-x

Abstract: Different contents of CaCO3 nanoparticles were doped into the solution of polysulfone-bSelective swelling was performed on the obtained block copolymer structures in the solvent pair of ethanolhydrochloric acid and the spaces initially occupied by CaCO3 provided extra pores to the block copolymer

Keywords： block copolymers     selective swelling     ultrafiltration     CaCO3 nanoparticles     sacrificial nanofillers    

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Numerical solution, simulation and testing of the thermal dynamic characteristics of ball-screws

XIA Junyong, HU Youmin, WU Bo, SHI Tielin

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1,   Pages 28-36 doi: 10.1007/s11465-008-0007-4

Abstract: Based on the theory of heat transfer, this paper supplies a numerical solution to the non-homogeneousBy testing the thermal dynamic characteristics of the ball-screw, the numerical solution is validated

Keywords： numerical solution     temperature corresponding     temperature distribution     end-most     ball-screw    

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Analytical dynamic solution of a flexible cable-suspended manipulator

Mahdi BAMDAD

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4,   Pages 350-359 doi: 10.1007/s11465-013-0271-9

Abstract: In this paper, an analytic solution is provided to solve cable vibration.Also, a closed form solution can be adopted to improve the dynamic response to flexibility.

Keywords： parallel robot     flexible cable     suspended robot     dynamic    

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Synthesis of vinylferrocene and the ligand-exchange reaction between its copolymer and carbon nanotubes

Ran SHI,Hai WANG,Ping TANG,Yuezhen BIN

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 2,   Pages 171-178 doi: 10.1007/s11705-014-1428-8

Abstract: The degree of grafting of the copolymer onto the CNTs surface was calculated from thermogravimetric analysisThe electrical conductivity of composites prepared from the polymer-grafted CNTs and copolymer (acrylonitrile

Keywords： vinylferrocene     poly (Vf-co-St)     CNTs     dispersibility    

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Yue’s solution of classical elasticity in

Zhong-qi Quentin YUE

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 3,   Pages 215-249 doi: 10.1007/s11709-015-0298-6

Abstract: Findings of this solution formulation are further used in the companion paper for mathematical verificationsolutions have been named by other researchers as Yue’s approach, Yue’s treatment, Yue’s method and Yue’s solution

Keywords： elasticity     solution     layered solid     graded material    

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Title Author Date Type Operation

Solution properties and self-association of multi-blocks like copolymer P(AM/AA) prepared by template

ZHANG Yuxi, WU Feipeng, LI Miaozhen, WANG Erjian

Journal Article

PVDF ultrafiltration membranes of controlled performance via blending PVDF-g-PEGMA copolymer synthesized

Shuai Wang, Tong Li, Chen Chen, Baicang Liu, John C. Crittenden

Journal Article

Synthesis of a new iron (III) porphyrin acrylate-styrene copolymer and its catalysis for hydroxylation

YU Hancheng, LI Xixian, HUANG Jinwang, JI Liangnian, CHEN Xianli

Journal Article

Thermoresponsive block copolymer supported Pt nanocatalysts for base-free aerobic oxidation of 5-hydroxymethyl

Journal Article

Effect of styrene-butadiene-styrene copolymer on the aging resistance of asphalt: An atomistic understanding

Journal Article

Preparation of copolymer-grafted mixed-mode resins for immunoglobulin G adsorption

Shenggang Chen, Tao Liu, Ruiqi Yang, Dongqiang Lin, Shanjing Yao

Journal Article

A review of optimization modeling and solution methods in renewable energy systems

Journal Article

Molecular dynamics study of water diffusion in an amphiphilic block copolymer with large difference in

Yang Zhou, Phillip Choi

Journal Article

Morphologies of diblock copolymer confined in a slit with patterned surfaces studied by dissipative particle

FENG Jian, HUANG Yongmin, LIU Honglai, HU Ying

Journal Article

Highly selective detection of copper(II) by a “ligand-free” conjugated copolymer in nucleophilic solvents

Weixing Deng, Pengfei Sun, Quli Fan, Lei Zhang, Tsuyoshi Minami

Journal Article

Preparation of polysulfone-based block copolymer ultrafiltration membranes by selective swelling and

Journal Article

Numerical solution, simulation and testing of the thermal dynamic characteristics of ball-screws

XIA Junyong, HU Youmin, WU Bo, SHI Tielin

Journal Article

Analytical dynamic solution of a flexible cable-suspended manipulator

Mahdi BAMDAD

Journal Article

Synthesis of vinylferrocene and the ligand-exchange reaction between its copolymer and carbon nanotubes

Ran SHI,Hai WANG,Ping TANG,Yuezhen BIN

Journal Article

Yue’s solution of classical elasticity in

Zhong-qi Quentin YUE

Journal Article