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Preparation and Performance of HGM/PPENK-based High Temperature-resistant Thermal Insulating Coatings

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Chinese Journal of Polymer Science 2021年第6期39卷 770-778,I0008页

作者： Lei Song Li-Shuai Zong jin-yan wang Xi-Gao Jian State Key Laboratory of Fine Chemicals Department of Polymer Science and MaterialsSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China

Novel high temperature-resistant coatings with high mechanical strength and thermal-insulating performance were prepared with poly(ether nitrile ketone)(PPENK)resin as matrix and hollow glass microspheres(HGMs)as thermal-insulating *** corresponding mechanical and thermal-insulating study indicated that the mechanical properties of the coatings decreased with the increase of HGM content,and were improved after surface modification of HGM by KH570 resulting in enhancement of interaction between HGM and PPENK *** thermal conductivity of HGM/PPENK thermal-insulating coating decreased with the increase of HGM content and coating thickness,along with the decrease of the true *** also showed slight increase trend due to HGMs surface *** HGM/PPENK coating filled with modified HGMs showed better thermal resistance than that of unmodified HGM/PPENK *** thermal decomposition temperature at 5%weight loss of the coating containing modified HGMs was 10°C lower than that of pure PPENK,and 40°C higher than that of neat HGM/PPENK *** coating exhibited commendable appearance after 400°C for 30 *** merits of HGM/PPENK-based thermal coatings obviously demonstrated promising prospect in thermal protection fields.

关键词： Coatings Temperature-resistant HGM/PPENK Thermal conductivity Mechanical properties

Heteropolymolybdate as a New Reaction-controlled Phase-transfer Catalyst for Efficient Alcohol Oxidation with Hydrogen Peroxide

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Chinese Chemical Letters 2006年第6期17卷 848-850页

作者： Zhi Huan WENG jin yan wang Xi Gao JIAN Department of Polymer Science and Materials Dalian University of TechnologyLiaoning High Performance Polymer Engineering Research Center Dalian 116012

A new catalytic process for the synthesis of aldehyde from alcohol by oxidation with H202 with high selectivity, was studied. In this system, heteropolymolybdate [C7H7N（CH3）3]3 {PO4[MoO（O2）2]4} was utilized as the reaction-controlled phase-transfer catalyst to catalyze oxidation of benzyl and aliphatic alcohols. The molar ratio of H2O2 and alcohol was 0.75, no other by-products were detected by gas chromatography, the results of oxidation reaction indicated that the catalyst has high activity and stability.

关键词： Heteropolymolybdate reaction-controlled phase-transfer alcohol oxidation.

Synthesis and Characterization of Poly(ether imide)s Containing m-Methyl and Phthalazinone Moieties

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Chinese Chemical Letters 2003年第4期14卷 331-332页

作者： jin yan wang Shu De XIAO Xi Gao JIAN Department of Polymer Science&Materials Dalian University of TechnologyDalian 116012

Three novel poly(ether imide)s were synthesized by one-step solution polymerization from 2-(3, 4-dicarboxyl-N-phenyl)-4-(3, 4-dicarboxyl-phenoxyl-4-(2-methyl)-phenyl)-2, 3- phthal-azin-1-one dianhydride and three amin... 详细信息

关键词： Synthesis poly(ether imide)s phthalazinone dianhydride.

Efficient oxidation of benzyl alcohol with heteropolytungstate as reaction-controlled phase-transfer catalyst

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Chinese Chemical Letters 2007年第8期18卷 936-938页

作者： Zhi Huan Weng jin yan wang Xi Gao Jian Department of Polymer Science and Materials Dalian University of Technology Liaoning Research Center of High Performance Resin Engineering and Technology Dalian 116012 China

A series of heteropolytungstates has been synthesized and utilized as catalysts to catalyze oxidation of benzyl alcohol with aqueous hydrogen peroxide. The results indicated that three of these catalysts showed the properties of reaction-controlled phasetransfer catalysis, and they had excellent catalytic ability to the oxidation of benzyl alcohol. No other by-products were detected by gas chromatography. Once the hydrogen peroxide was consumed completely, the catalyst precipitated from solvent, and the results of the catalyst recycle showed that the catalyst had high stability.

关键词： Heteropolytungstate Reaction-controlled phase-transfer Benzyl alcohol Benzaldehyde Hydrogen peroxide

Synthesis and Characterization of Poly (ether imide)s Containing Phthalazinone and Isopropyl Moieties

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Chinese Chemical Letters 2001年第7期12卷 593-594页

作者： jin yan wang Xi Gao JIAN Shu De XIAO Department of Polymer Science&Material College of Chemical EngineeringDalian University of TechnologyDalian 116012

A novel poly(ether imide)s containing phthalazinone and isopropyl moieties derived from 2-(4-aminophenyl)-4-[4-(4-aminophenoxy)phenyl]-phthalazin-1-one and bisphenol-A diphthalic anhydride was synthesized by one-step solution condensation polymerization in nr-cresol. The polymer was characterized by FTIR, NMR, molecular weights, glass transition temperature, thermal degradation temperature and WAXD.

关键词： Poly (ether imide) s phthalazinone one-step solution condensation polymerization

Oxidation-based wet-etching method for Al Ga N/Ga N structure with different oxidation times and temperatures

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Rare Metals 2015年第1期34卷 1-5页

作者： yang Liu jin-yan wang Zhe Xu jin-Bao Cai Mao-Jun wang Min Yu Bing Xie Wen-Gang Wide Bandgap Semiconductor Laboratory Institute of Microelectronics Peking University

In this article, a detailed analysis of the wet- etching technique for AIGaN/GaN heterostructure using dry thermal oxidation followed by a wet alkali etching was performed. The experimental results show that the oxida- tion plays a key role in the wet-etching method and the etching depth is mainly determined by the oxidation tem- perature and time. The correlation of etching roughness with oxidation time and temperature was investigated. It is found that there exists a critical oxidation temperature in the oxidation process. Finally, a physical explanation of the oxidation procedure for A1GaN layer was given.

关键词： Wet-etching AIGaN/GaN Atomic forcemicroscopy Rapid thermal annealing

Construction of Aniline Trimer Based Conjugated Polymers through Schiff Base Reaction and Their Use as Feedstock for Infrared Stealth Coatings

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Chinese Journal of Polymer Science 2023年第6期41卷 851-858,I0005页

作者： Xiang-Yu Li Li-Shuai Zong Yi-Bo wang Qi Cao jin-yan wang Xi-Gao Jian State Key Laboratory of Fine Chemicals Liaoning High Performance Resin Engineering Research CenterDepartment of Polymer Science&EngineeringDalian University of TechnologyDalian 116024China

In order to meet the demand for infrared stealth materials in the military field,conjugated polymers containing Schiff base moieties were designed and *** dialdehyde monomers were introduced and their effect on the comprehensive properties were systematically *** resulted polymers could be cast in solution to prepare polymer *** coatings exhibited high thermal stability up to 400℃ at 5%weight loss,and excellent mechanical performance with high Young’s modulus and *** infrared emissivity values varied from 0.587 to 0.627 at wavelength of 8-14μm and ranged from 0.595 to 0.609 at wavelength of 2-22μ***,it was found that the ATTPAL structure with carbazole moieties had a lower band gap and better electrical conductivity by photoelectric test and DFT theoretical ***,the infrared emissivity value of ATTPAL coating was the lowest compared with p-phenyl and pyridyl containing analogues,suggesting it was potential material for the future development of infrared stealth *** combined results showed that reducing the band gap and improving the electrical conductivity of the structure were both beneficial to the reduction of infrared *** would positively provide new ideas for the design of infrared stealth materials.

关键词： materials Schiff conductivity

Synthesis of New Soluble Polyarylates Containing Phthalazinone Moiety

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Chinese Chemical Letters 2006年第1期17卷 140-142页

作者： Yu Rong GAO jin yan wang Cheng LIU Xi Gao JIAN Department of Polymer Science and Materials Dalian University of Technology Dalian 116012

A novel diacid chloride, 2-（4-chlorocarboxyphenyl）-4-[3,5-dimethyl-4-（4-chlorocarbo-xylphenoxy）phenyl]-2,3-phthalazin-l-one 2, was synthesized and used for the preparation of polyarylates with inherent viscosities of 0.25-0.37 dL·g^-1. The glass transition temperatures of polyarylates were in the range of 217-272℃. The temperatures at 10% weight loss of polyarylates were found to be in the range of 434-464℃ in nitrogen atmosphere and their structure was confirmed by FTIR and IH NMR. The amorphous polyarylates exhibited excellent solubility in a variety of solvents such as NMP, DMAc, DMF and chloroform.

关键词： Polyarylates phthalazinone solubility thermal behavior.

Synthesis and Properties of Polyetherketones Containing Sulfide and Phthalazinone

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Chinese Chemical Letters 2002年第7期13卷 607-608页

作者： Gong Xiong LIAO Xi Gao JIAN Xiao Yuan GUO jin yan wang Department of Polymer Science Dalian University of TechnologyDalian 116012

High molecular weight copoly(ether ketone)s (PEK) based on 4-(4-hydroxyphenyl)-1- phthalazinone (DHPZ)/4,4-thiobisphenol (TBP)/4,4-diflourodiphenylketone (DFK) were prepared by nucleophilic substitution polycondensation. The copolymers were characterized by FT-IR and 1H-NMR. Thermal properties and solubility of copolymers were studied.

关键词： Polyetherketones 4,4-thiobisphenol 4-(4-hydroxyphenyl)-1-phthalazinone.