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ABS接枝粉料结构及抗氧剂用量对ABS树脂性能的影响

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中国塑料 2024年第5期38卷 88-93页

作者：宋子睿刘伯军张明耀长春工业大学化学工程学院长春130012

采用乳液接枝聚合技术,制备了核壳比为60/40、70/30且接枝过程中引发剂用量不同的ABS接枝共聚物胶乳,系统研究了丙烯腈⁃丁二烯⁃苯乙烯塑料(ABS)壳层厚度及水性抗氧剂用量对ABS接枝共聚物热氧老化性能的影响,同时通过熔融共混技术生产AB... 详细信息

采用乳液接枝聚合技术,制备了核壳比为60/40、70/30且接枝过程中引发剂用量不同的ABS接枝共聚物胶乳,系统研究了丙烯腈⁃丁二烯⁃苯乙烯塑料(ABS)壳层厚度及水性抗氧剂用量对ABS接枝共聚物热氧老化性能的影响,同时通过熔融共混技术生产ABS树脂,测试了水性抗氧剂加入量和ABS壳层厚度对ABS树脂力学性能和表观性能的影响。研究表明:ABS壳层越薄,其ABS接枝共聚物的热氧老化性能越差。ABS壳层厚度对树脂冲击强度和表观性能均有影响。本研究使用的水性抗氧剂加入量在胶乳总重的1%(质量分数,下同)以下时,水性抗氧剂加入量越高,ABS接枝共聚物的氧化诱导期和氧化诱导温度越高。抗氧剂加入量在0.75%时,抗热氧老化能力达到较高水平。抗氧剂加入量对ABS树脂的力学性能无影响,对其表观性能如白度、黄色指数影响明显。

关键词：丙烯腈⁃丁二烯⁃苯乙烯树脂核壳结构抗氧剂氧化诱导时间

水性抗氧剂组成以及含量对ASA树脂性能的影响

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中国塑料 2024年第3期38卷 73-78页

作者：刘孟恩汤千熠张明耀刘伯军长春工业大学化学工程学院长春130012

采用乳液聚合法制备了核壳比为6/4的ASA核壳接枝共聚物胶乳,系统地研究了水性抗氧剂的组成以及含量对ASA接枝共聚物热氧老化性能的影响,并采用熔融共混法制备ASA树脂,探究了水性抗氧剂的组成以及含量对ASA树脂力学性能、表观性能的影响... 详细信息

采用乳液聚合法制备了核壳比为6/4的ASA核壳接枝共聚物胶乳,系统地研究了水性抗氧剂的组成以及含量对ASA接枝共聚物热氧老化性能的影响,并采用熔融共混法制备ASA树脂,探究了水性抗氧剂的组成以及含量对ASA树脂力学性能、表观性能的影响。结果表明,水性抗氧剂的组成CPL/DLTP为2/3时,其ASA接枝共聚物的热氧老化性能最优;随着水性抗氧剂含量的增加,ASA接枝共聚物的氧化诱导期显著增长;水性抗氧剂的加入量超过1%以后,ASA接枝共聚物的氧化诱导期增长不显著;在230℃空气条件下,添加1%水性抗氧剂的ASA接枝共聚物的氧化诱导期可达73.1 min,其抗热氧老化能力是相同条件下不添加水性抗氧剂ASA接枝共聚物的80倍以上;水性抗氧剂的组成及含量对ASA树脂的力学性能无明显影响,对其表观性能如白度影响明显。

关键词：丙烯腈-苯乙烯-丙烯酸丁酯核壳接枝共聚物水性抗氧剂氧化诱导期抗热氧老化能力

数字化转型、失败学习与制度资本对企业数字化创新影响的组态研究

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科技进步与对策 2024年第15期41卷 65-73页

作者：陈怀超刘柏君梁晨何智敏太原理工大学经济管理学院山西太原030024

运用fsQCA方法,基于258份有效样本,从组态视角探讨数字化转型(数字化技术水平、数字化应用范围)、失败学习(个体失败学习、组织失败学习)、制度资本(正式制度资本、非正式制度资本)与企业数字化创新的复杂因果关系。结果表明:首先,单个... 详细信息

运用fsQCA方法,基于258份有效样本,从组态视角探讨数字化转型(数字化技术水平、数字化应用范围)、失败学习(个体失败学习、组织失败学习)、制度资本(正式制度资本、非正式制度资本)与企业数字化创新的复杂因果关系。结果表明:首先,单个因素不构成企业高/非高数字化创新的必要条件,但是高数字化技术水平在产生企业高数字化创新过程中发挥普适性作用;其次,产生企业高数字化创新的组态有5个,其中存在两组二阶等价组态,第一组二阶等价组态由3个组态构成,均以高数字化技术水平和高个体失败学习为核心条件,并分别以高数字化应用范围和高组织失败学习、高数字化应用范围和高制度资本、高数字化应用范围和非高制度资本为边缘条件;第二组二阶等价组态由2个组态构成,均以高组织失败学习和高非正式制度资本为核心条件,并分别以高数字化技术水平、高个体失败学习和高正式制度资本,以及高数字化转型和高正式制度资本为边缘条件。

关键词：数字化转型失败学习制度资本数字化创新 fsQCA

产业智能化对省域创新韧性的影响——基于面板数据的实证研究

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科技管理研究 2024年第17期44卷 92-101页

作者：白珊张莹刘柏君南开大学商学院天津300071 南开大学中国公司治理研究院天津300071 太原理工大学经济管理学院山西太原030024

智能化为产业发展提供更加准确的信息支持,实现产业之间的数据共享、智能协同和资源互补,并帮助产业提高差异化生产的能力,但其对省域创新韧性的影响机制仍有待研究。基于2010—2021年中国30个省域的面板数据,采用可行广义最小二乘法和... 详细信息

智能化为产业发展提供更加准确的信息支持,实现产业之间的数据共享、智能协同和资源互补,并帮助产业提高差异化生产的能力,但其对省域创新韧性的影响机制仍有待研究。基于2010—2021年中国30个省域的面板数据,采用可行广义最小二乘法和固定效应模型,实证分析产业智能化对省域创新韧性的影响及其影响的地区异质性,并探究产业结构高级化和合理化的中介作用以及创新人才集聚的调节作用。研究发现:产业智能化显著提升了省域创新韧性;产业智能化对中国东部和中部地区的省域创新韧性均存在显著提升作用,但对西部地区的提升作用不显著;产业结构高级化和合理化在产业智能化影响省域创新韧性中发挥部分中介作用;创新人才集聚增强了产业智能化对省域创新韧性的影响。为此,要加速智能化技术的研发和应用,同时引导生产要素向高级化、合理化方向发展,加大对资本和密集型产业等的投资力度。

关键词：产业智能化省域创新韧性产业结构高级化产业结构合理化创新人才集聚区域创新

Preparation and Properties of Hybrid Silane-crosslinked Sulfonated Poly(aryl ether ketone)s as Proton Exchange Membranes

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Chemical Research in Chinese Universities 2019年第5期35卷 937-944页

作者： liu Zhenchao WANG Peng HU Wei liu baijun Key Laboratory of High Performance Plastics Ministry of EducationNational & Local Joint Engineering Laboratory for Synthesis Technology of High Performance PolymerCollege of ChemistryJilin UniversityChangchun 130012P.R.China College of Chemical Engineering Changchun University of TechnologyChangchun 130012P.R.China

A series of novel organic-inorganic hybrid proton-conducting electrolyte membranes with silane-crosslinked sulfonated poly(aryl ether ketone)(SC-SPAEK) networks was prepared via a simple procedure that includes solution casting and acid treatment. The organosilicon pendants of the silane-grafted SPAEK, which were expected to serve as coupling and crosslinking agents, were found to play a key role in the homogenous dispersion of inorganic particles and improved the performance of hybrid membranes. The hybrid membranes exhibited enhanced proton conductivity, and SC-SPAEK/TiO2-4 showed an extremely high proton conductivity of 0.1472 S/cm at 100℃. The crosslinked hybrid membranes also demonstrated good chemical resistance, oxidative stability, and mechanical properties. The crosslinked hybrid membranes with excellent comprehensive performance may be a promising material for proton exchange membrane fuel cells.

关键词： Proton-conducting electrolyte membrane Sulfonated poly(aryl ether ketones) Cross-linked network Hybrid

Synthesis of ITQ-2 zeolite under static conditions and its properties

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Science China Chemistry 2006年第2期49卷 148-154页

作者： liu baijun HUO Huijuan MENG Qingmin GAO Shansong Key Laboratory of Catalysis of China National Petroleum Corporation China University of Petroleum Beijing 102249 China Key Laboratory of Catalysis of China National Petroleum Corporation China University of Petroleum Beijing 102249 China Key Laboratory of Catalysis of China National Petroleum Corporation China University of Petroleum Beijing 102249 China Key Laboratory of Catalysis of China National Petroleum Corporation China University of Petroleum Beijing 102249 China

Using silica gel as the precursor, MCM-22(p) was synthesized under the static conditions. Then ITQ-2 zeolite was obtained by using n-cetyltrimethylammonium bromide (CTAB) and tetrapro- pylammonium hydroxide (TPAOH) as the swelling agents to swell the pores of MCM-22(p). The ob- tained zeolite was characterized by XRD, SEM, BET, NH3-TPD. The results show that the zeolite had the best swelling when MCM-22(p):CTAB:TPAOH=1:4:1. The synthesis duration and temperature did not influence significantly the pore swelling. Except TPAOH, CTAB can also be used together with tetrabuthylammonium hydroxide (TBAOH) as the pore swelling agent. There was contribution of sur- face area and pore volume from the mesoporous pores in the ITQ-2 zeolite and it also showed weaker acidity than MCM-22. However, the ITQ-2 supported NiW catalyst showed higher activity and selec- tivity to the middle distillates in the hydrocracking of vacuum gasoil (VGO) than MCM-22 supported catalyst. This implied that the diffusion of large molecules of heavy oil in the catalyst was facilitated due to the presence of the mesoporous pores and hence higher activity and selectivity to middle dis- tillates.

关键词： static crystallization, zeolite ITQ-2, swelling agent, delaminated zeolite, hydrocracking.

Thermally Conductive Study of Polyethylene/Al2O3 Composite Networks Cross-linked by Electron Beam Irradiation

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Chemical Research in Chinese Universities 2020年第5期36卷 940-945页

作者： SHI Chengying YANG Jiayu liu Yang WANG Yanmiao XU Wenge XU Yiquan HU Wei liu baijun Key Laboratory of High Performance Plastics Ministry of EducationNational&Local Joint Engineering Laboratory for Synthesis Technology of High Performance PolymerCollege of CheniistiyJilin UniversityChangchun 130012P.R.China Changchun Radiation Technology Co. Ltd.China Isotope&Radiation Corporation(CIRC)Changchun 130102P.R.China Changchun Kinwa High Technology Co. Ltd.Changchun 130102P.R.China Key Laboratory of Polyoxonietalate Science Kfinistiy of EducationFaculty of ChemistryNortheast Normal UniversityChangchun 130024P.R.China

The surface-modifled Al2O3 particles were introduced into polyethylene(PE)to enhance the thermal conductivity,and PE/Al2O3 cross-linked networks with improved thermal and mechanical properties were prepared through electron beam(EB)irradiation *** incorporation of reactive irradiation sensitizer was useful in fabricating a high degree of cross-linking(DC)PE networks under a low irradiation *** the PE sample containing 2%sensitizer,DC ca.67.1%could be obtained under 60 kGy(1 kGy=1000 J/kg).EB-irradiation greatly improved thetensile stress of PE-based samples,and the tensile stresses of the samples with 0.2—5%TMPTA(trimethylolpr pane triacrvlate)under 60 kGy were 24.61—27.77 *** the EB-irradiated samples had higher Vicat softening temperatures than the samples without *** treatment at 120 kGy,the Vicat softening temperatures of PE-Al2O3-44/TMPTA-2 increased from 127℃to 130.4℃.SEM images revealed that PE-Al2O3-5O samples with increased amount of Al2O3 particles showed a conduction"pathway,"and thennal conductivity reached 0.67 W/(m·K).Thus,high-performance pipes were extruded,which could satisfy the static hydraulic blasting test and exhibit improved thennal conduction capability.

关键词： Electron beam(EB)-irradiation Cross-linked network Thermal conductivity

Proton Conductivity Improvement Effect of Cellulose on SPEEKK Based PEM

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Chemical Research in Chinese Universities 2019年第5期35卷 916-923页

作者： ZHAO Qi LIANG Xiaoxiao YOU Yingxue WANG Yuliang DU Xinwei liu baijun HU Wei College of Chemical Engineering Changchun University cf TechnologyChangchun 130012P.R.China College of Chemistry Jilin UniversityChangchun 130012P.R.China

The proton exchange membranes(PEMs) were prepared through the solution mixing method of sulfonated poly(etlier ether ketone ketoneXsPEEKK) and cellulose. Cellulose was dissolved by 1-ally 1-3-methylimidazolium chioride(AMIMC1) and then mixed with sPEEKK solution. sPEEKK/cellulose(SC) composite membranes were prepared by solution casting. The membranes have high flexibility and transparency, which meant the compounding in molecular level. Meanwhile, the composite membranes showed excellent mechanical properties and high proton conductivity. The mechanical property reached 29 MPa, and the proton conductivity was as high as 0.32 S/cm. Thus, as a kind of biomaterials, cellulose could be ail excellent reinforcing material for poly(aryl ether ketone)(PAEK) based PEMs.

关键词： Cellulose Poly(aryl ether ketone ketone) Ionic liquid Mechanical property Proton conductivity

Synthesis of AIMCM-41 mesoporous molecular sieves with high stability

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Petroleum Science 2008年第2期5卷 163-166页

作者： liu baijun Wang Hui Key Laboratory of Catalysis China National Petroleum Corporation China University of Petroleum Beijing 102249 China State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China

Mesoporous molecular sieves AIMCM-41 were synthesized by static hydrothermal crystallization using cetyltrimethylammonium bromide as template, water glass as silica source and pseudoboehmite as aluminum source. The XRD results showed that the prepared AlMCM-41 mesoporous molecular sieves had high relative crystallinity and long-range order. The relative crystallinity was greater than 27% after calcination at 900 ℃ for 2 hours and was still greater than 14% after ageing in steam at 800 ℃ for 2 hours. The results indicated that both thermal and hydrothermal stabilities of the mesoporous molecular sieves AIMCM-41 were good.

关键词： Pseudo-boehmite hydrothermal stability synthesis AIMCM-41 thermal stability hydrothermal