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Optimization of polyurethane-bonded thin overlay mixture designation for airport pavement
Xianrui LI; Ling XU; Qidi ZONG; Fu JIANG; Xinyao YU; Jun WANG; Feipeng XIAO
《结构与土木工程前沿(英文)》 2022年 第16卷 第8期 页码 947-961 doi: 10.1007/s11709-022-0836-y
关键词: polyurethane-bonded mixture mix design optimization airport pavement thin overlay gray relational analysis
Biodegradation of waste refrigerator polyurethane by mealworms
《环境科学与工程前沿(英文)》 2023年 第17卷 第3期 doi: 10.1007/s11783-023-1638-8
● Waste refrigerator polyurethane (WRPU) was ingested and biodegraded by mealworms.
关键词: Waste refrigerator polyurethane Mealworms Biodegradation Carbon balance Gut microorganism
Hyperbranched azo polyurethane synthesized through A + B scheme
CHE Pengchao, HE Yaning, WANG Xiaogong
《化学科学与工程前沿(英文)》 2008年 第2卷 第1期 页码 123-126 doi: 10.1007/s11705-007-0078-5
关键词: dimethylformamide one-step polymerization polyurethane 2-hydroxyethyl diphenylmethane-4 4′-diisocyanate
Preparation of lignin/TiO2 nanocomposites and their application in aqueous polyurethane coatings
Dongjie Yang, Shengyu Wang, Ruisheng Zhong, Weifeng Liu, Xueqing Qiu
《化学科学与工程前沿(英文)》 2019年 第13卷 第1期 页码 59-69 doi: 10.1007/s11705-018-1712-0
《结构与土木工程前沿(英文)》 2022年 第16卷 第1期 页码 131-143 doi: 10.1007/s11709-021-0787-8
关键词: RC beams flexural strengthening CFRP CNTs finite element
Thomas ELLINGHAM, Hrishikesh KHARBAS, Mihai MANITIU, Guenter SCHOLZ, Lih-Sheng TURNG
《机械工程前沿(英文)》 2018年 第13卷 第1期 页码 96-106 doi: 10.1007/s11465-018-0498-6
A three-stage molding process involving microcellular injection molding with core retraction and an “out-of-mold” expansion was developed to manufacture thermoplastic polyurethane into lightweight foams of varying local densities, microstructures, and mechanical properties in the same microcellular injection molded part. Two stages of cavity expansion through sequential core retractions and a third expansion in a separate mold at an elevated temperature were carried out. The densities varied from 0.25 to 0.42 g/cm3 (77% to 62% weight reduction). The mechanical properties varied as well. Cyclic compressive strengths and hysteresis loss ratios, together with the microstructures, were characterized and reported.
关键词: thermoplastic polyurethane microcellular injection molding cavity expansion compressive strength hysteresis loss ratio
3D finite element analysis of composite noise barrier constructed of polyurethane products
Ben DAEE,Hesham El NAGGAR
《结构与土木工程前沿(英文)》 2017年 第11卷 第1期 页码 100-110 doi: 10.1007/s11709-016-0364-8
关键词: 3D finite element sound wall rigid polyurethane foam poly-wall numerical model calibration
Jiao Feng, Qiuhao Lu, Weimin Tan, Kequan Chen, Pingkai Ouyang
《化学科学与工程前沿(英文)》 2019年 第13卷 第1期 页码 80-89 doi: 10.1007/s11705-018-1763-2
1,5-Pentamethylene diisocyanate, a novel aliphatic diisocyanate formed from bio-based 1,5-pentamethylenediamine, has been used as a hard segmented material to synthesize polyurethane. In this study, several waterborne polyurethane (WPU) dispersions have been successfully prepared by a prepolymer process from 1,5-pentamethylene diisocyanate poly(polyether) with different NCO/OH ratios and 1,6-hexanediol (HDO)/dimethylol propionic acid (DMPA) molar ratios. The Fourier transform infrared (FTIR) spectra, thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction, and a mechanical tensile test were used to investigate the structures, thermal stability, phase separation, crystallinity, mechanical properties, and adhesive performance of the WPU dispersions. The FTIR results indicate that the degree of hydrogen bonding and the numbers of urea groups increase as the NCO/OH ratio and HDO/DMPA molar ratio increase. Furthermore, the phase separation increases and the thermal stability decreases as the NCO/OH ratio increases or the HDO/DMPA molar ratio decreases. Finally, WPU3.0-2.4 (NCO/OH=3, HDO/DMPA=2.4) exhibits a maximum tensile strength and shear strength, pointing to its possible use as an adhesive. These results could provide a very valuable reference for industrial applications of WPU.
关键词: 1 5-pentamethylene diisocyanate polyurethane water based
Anisotropy of multi-layered structure with sliding and bonded interlayer conditions
Lingyun YOU, Kezhen YAN, Jianhong MAN, Nengyuan LIU
《结构与土木工程前沿(英文)》 2020年 第14卷 第3期 页码 632-645 doi: 10.1007/s11709-020-0617-4
关键词: multi-layered structure Hankel transformation anisotropic transversely isotropic interlayer condition Gauss-Legendre quadrature
Synthesis of mid-dicarboxy polystyrene by ATRP and formation of ionic-bonded supramolecules
YU Tao, WANG Yun, LU Dairen, BAI Ruke, LU Weiqi
《化学科学与工程前沿(英文)》 2007年 第1卷 第2期 页码 140-145 doi: 10.1007/s11705-007-0026-4
关键词: controlled molecular conversion bromination relationship isophthalate
Laser ablation of block copolymers with hydrogen-bonded azobenzene derivatives
Jintang Huang, Youju Huang, Si Wu
《化学科学与工程前沿(英文)》 2018年 第12卷 第3期 页码 450-456 doi: 10.1007/s11705-018-1735-6
Supramolecular assemblies (PS-b-P4VP(AzoR)) are fabricated by hydrogen-bonding azobenzene derivatives (AzoR) to poly(4-vinyl pyridine) blocks of polystyrene-block-poly(4-vinyl pyridine) (PS-b-P4VP). PS-b-P4VP(AzoR) forms phase separated nanostructures with a period of ~75–105 nm. A second length scale structure with a period of 2 µm is fabricated on phase separated PS-b-P4VP(AzoR) by laser interference ablation. Both the concentration and the substituent of AzoR in PS-b-P4VP(AzoR) affect the laser ablation process. The laser ablation threshold of PS-b-P4VP(AzoR) decreases as the concentration of AzoR increases. In PS-b-P4VP(AzoR) with different substituents (R= CN, H, and CH3), ablation thresholds follow the trend: PS-b-P4VP(AzoCN)<PS-b-P4VP(AzoCH3)<PS-b-P4VP(AzoH). This result indicates that the electron donor group (CH3) and the electron acceptor group (CN) can lower the ablation threshold of PS-b-P4VP(AzoR).
关键词: laser ablation block copolymers hydrogen-bond azobenzene derivatives supramolecular assembly
A study on quality evaluation for bituminous mixture using X-ray CT
Satoshi TANIGUCHI, Keiichiro OGAWA, Jun OTANI, Itaru NISHIZAKI
《结构与土木工程前沿(英文)》 2013年 第7卷 第2期 页码 89-101 doi: 10.1007/s11709-013-0197-7
关键词: asphalt concrete mixture aggregate bitumen bitumen content quality evaluation X-ray CT
Weihong Zhang, Dan Wang, Jie-Xin Wang, Yuan Pu, Jian-Feng Chen
《化学科学与工程前沿(英文)》 2020年 第14卷 第6期 页码 1087-1099 doi: 10.1007/s11705-019-1895-z
《化学科学与工程前沿(英文)》 2023年 第17卷 第1期 页码 1-14 doi: 10.1007/s11705-022-2176-9
关键词: SiO2/TiO2 nanoparticle nanocomposite coatings dynamic mechanical analysis electrochemical techniques corrosion colloids and interfaces
Heyun WANG, Yakai FENG, Marc BEHL, Andreas LENDLEIN, Haiyang ZHAO, Ruofang XIAO, Jian LU, Li ZHANG, Jintang GUO
《化学科学与工程前沿(英文)》 2011年 第5卷 第3期 页码 392-400 doi: 10.1007/s11705-011-1202-0
关键词: electrospinning artificial blood vessels scaffold polyurethane gelatin nanofiber hemocompatibility
标题 作者 时间 类型 操作
Optimization of polyurethane-bonded thin overlay mixture designation for airport pavement
Xianrui LI; Ling XU; Qidi ZONG; Fu JIANG; Xinyao YU; Jun WANG; Feipeng XIAO
期刊论文
Hyperbranched azo polyurethane synthesized through A + B scheme
CHE Pengchao, HE Yaning, WANG Xiaogong
期刊论文
Preparation of lignin/TiO2 nanocomposites and their application in aqueous polyurethane coatings
Dongjie Yang, Shengyu Wang, Ruisheng Zhong, Weifeng Liu, Xueqing Qiu
期刊论文
bond enhancement using carbon nanotubes on flexural behavior of RC beams strengthened with externally bonded
期刊论文
Microcellular injection molding process for producing lightweight thermoplastic polyurethane with customizable
Thomas ELLINGHAM, Hrishikesh KHARBAS, Mihai MANITIU, Guenter SCHOLZ, Lih-Sheng TURNG
期刊论文
3D finite element analysis of composite noise barrier constructed of polyurethane products
Ben DAEE,Hesham El NAGGAR
期刊论文
ratio and the 1,6-hexanediol/dimethylol propionic acid molar ratio on the properties of waterborne polyurethane
Jiao Feng, Qiuhao Lu, Weimin Tan, Kequan Chen, Pingkai Ouyang
期刊论文
Anisotropy of multi-layered structure with sliding and bonded interlayer conditions
Lingyun YOU, Kezhen YAN, Jianhong MAN, Nengyuan LIU
期刊论文
Synthesis of mid-dicarboxy polystyrene by ATRP and formation of ionic-bonded supramolecules
YU Tao, WANG Yun, LU Dairen, BAI Ruke, LU Weiqi
期刊论文
Laser ablation of block copolymers with hydrogen-bonded azobenzene derivatives
Jintang Huang, Youju Huang, Si Wu
期刊论文
A study on quality evaluation for bituminous mixture using X-ray CT
Satoshi TANIGUCHI, Keiichiro OGAWA, Jun OTANI, Itaru NISHIZAKI
期刊论文
High-gravity-assisted emulsification for continuous preparation of waterborne polyurethane nanodispersion
Weihong Zhang, Dan Wang, Jie-Xin Wang, Yuan Pu, Jian-Feng Chen
期刊论文
surface modified mixed metal oxide nanoparticles on the electrochemical and mechanical properties of polyurethane
期刊论文