杜强国
有机无机纳米复合材料的结构与性能研究;玻璃纤维增强复合材料的研发;医用高分子材料和人工脏器的研究;微孔聚丙烯中空纤维的制备方法,微孔形态和成孔机理的研究;热致相分离法制备微孔中空纤维的理论和实践;聚烯烃的接枝改性,包括马来酸酐、丙烯酸、甲基丙烯酸环氧丙酯以及乙烯基硅烷的接枝;可聚合过氧化物的合成、共聚及其共聚物的接枝和支化;高压直流电缆绝缘材料中空间电荷的形成和分布,及其与聚合物结晶形态的关系;用反相色谱方法研究聚合物/溶剂、聚合物/聚合物的相互作用参数以及共聚物单体单元之间的相互作用;塑料加工、塑料的共混改性和汽车用高分子材料的开发;纳米复合材料的制备和结构研究;阻隔性高分子合金材料的研究;塑料的环境应力开裂研究。
个性化签名
- 姓名:杜强国
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
材料科学
- 研究兴趣:有机无机纳米复合材料的结构与性能研究;玻璃纤维增强复合材料的研发;医用高分子材料和人工脏器的研究;微孔聚丙烯中空纤维的制备方法,微孔形态和成孔机理的研究;热致相分离法制备微孔中空纤维的理论和实践;聚烯烃的接枝改性,包括马来酸酐、丙烯酸、甲基丙烯酸环氧丙酯以及乙烯基硅烷的接枝;可聚合过氧化物的合成、共聚及其共聚物的接枝和支化;高压直流电缆绝缘材料中空间电荷的形成和分布,及其与聚合物结晶形态的关系;用反相色谱方法研究聚合物/溶剂、聚合物/聚合物的相互作用参数以及共聚物单体单元之间的相互作用;塑料加工、塑料的共混改性和汽车用高分子材料的开发;纳米复合材料的制备和结构研究;阻隔性高分子合金材料的研究;塑料的环境应力开裂研究。
杜强国,复旦大学教授,博士生导师。上海汽车照明工程研究中心副主任,上海塑料工程学会理事,《上海塑料》、《塑料加工》编委。 1944年3月生于上海,1965年毕业于华东华工学院(今华东理工大学)。1965年至1978年在兰州化学工业公司任技术员,助理工程师。1978-1981复旦大学化学系研究生,其后在复旦大学任教,历任讲师、副教授、教授、博士生导师。期间于1987-1989作为访问学者在美国德克萨斯州立大学奥斯汀分校从事研究工作。
研究领域:有机无机纳米复合材料的结构与性能研究;玻璃纤维增强复合材料的研发;医用高分子材料和人工脏器的研究;微孔聚丙烯中空纤维的制备方法,微孔形态和成孔机理的研究;热致相分离法制备微孔中空纤维的理论和实践;聚烯烃的接枝改性,包括马来酸酐、丙烯酸、甲基丙烯酸环氧丙酯以及乙烯基硅烷的接枝;可聚合过氧化物的合成、共聚及其共聚物的接枝和支化;高压直流电缆绝缘材料中空间电荷的形成和分布,及其与聚合物结晶形态的关系;用反相色谱方法研究聚合物/溶剂、聚合物/聚合物的相互作用参数以及共聚物单体单元之间的相互作用;塑料加工、塑料的共混改性和汽车用高分子材料的开发;纳米复合材料的制备和结构研究;阻隔性高分子合金材料的研究;塑料的环境应力开裂研究。
研究成果曾获上海市科技进步二等奖(新一代聚丙烯膜式人工肺),三等奖(PC/PET合金),教育部二等奖(聚合物绝缘电老化的电荷陷阱理论及其应用)
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主页访问
1326
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关注数
0
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成果阅读
357
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成果数
8
【期刊论文】Microporous hollow fiber membranes formed from blends of isotactic and atactic polypropylene
杜强国, Bin Gu, Qiangguo Du*, Yuliang Yang
Journal of Membrane Science 164(2000)59-65,-0001,():
-1年11月30日
A novel process to prepare microporous hollow fiber membranes is proposed. Fibers of blends of isotactic polypropylene (i-PP) and atactic polypropylene (a-PP) spun under high take-up draw ratio are found to be elastic. Small angle X-ray scattering (SAXS) observation indicates that fibers have row-nucleated lamella structure normal to the fiber direction. Microporous polypropylene hollow fiber membranes were obtained from the fibers by extraction of atactic polypropylene and cool-stretching. The membranes have smaller pore size and higher permeability than those of traditional stretch method. The mechanism of micropore formation is discussed.
Microporous membranes, Hollow fiber, Lamella, Atactic polypropylene, Small angle X-ray scattering
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【期刊论文】The phase diagrams of mixtures of EVAL and PEG in relation to membrane formation
杜强国, Bo Liu, Qiangguo Du, Yuliang Yang*
Journal of Membrane Science 180(2000)81-92,-0001,():
-1年11月30日
The phase diagrams of various ethylene-vinyl alcohol (EVAL) copolymer with different hydroxyl (OH) group contents and poly(ethylene glycol) (PEG) with different molecular weights (ranging from 200 to 600) are determined. It is found experimentally that both the liquid-liquid (L-L) phase boundaries and the crystallization curves are shifted to higher temperature when the OH group contents in EVAL increase. On the other hand, only the L-L phase boundaries shift to higher temperature when the molecular weights of PEG increase. These phenomena are interpreted by using solubility parameters (δd, δp) to estimate the Flory-Huggins interaction parameters, χ*, of the mixtures. By extrapolating the L-L bi-phasic curves from cloud points of temperature (Tcloud), the experimental interaction parameters χ* are obtained, which are linearly correlated to the theoretically estimated interaction parameters, χ*.
Phase diagram, E, V, A, L, , PEG, TIPS, Interaction parameter
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杜强国, Zhiang Li, Qiangguo Du*, Xuezhen Shi, Fenggang Tao, Quanrui Wang, Graham Swift, Shuguang Wu
Macromol. Rapid Commun. 21, 590-594 (2000),-0001,():
-1年11月30日
A peroxide monomer, 4,49-divinyl benzoyl peroxide (DVBPO), was synthesized. Bulk copolymerization of DVBPO with methyl methacrylate (MMA) was initiated by di(2-ethyl hexyl)peroxy carbonate (EHP). DSC curves and the appearance of crosslinking of the product showed that DVBPO can copolymerize with MMA. The grafting copolymerization of butyl acrylate (BA) onto the copolymer was performed. The grafting efficiency (GE), determined by Soxhlet extraction, was high.
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【期刊论文】Charge Distribution and Crystalline Structure in Polyethylene Nucleated with Sorbitol
杜强国, XIANG LI, , YI CAO, QIANGGUO DU, YI YIN, DEMIN TU
Journal of Applied Polymer Science, Vol. 82, 611-619 (2001),-0001,():
-1年11月30日
The charge distribution in samples under direct current electrical field was measured by the pulsed electro-acoustic method, which showed that the space charges were greatly decreased and field distribution tended to be uniform in low-density polyethylene (LDPE) by adding 0.3 wt% bis-(p-ethylbenzylidene)sorbitol. The crystalline structures of LDPE and LDPE/sorbitol were studied. The non-isothermal crystallization kinetics were investigated by differential scanning calorimetry, which showed that sorbitol increases crystallization temperature and crystallinity, but lowers the Avrami exponent of crystallization. The results of wide-angle X-ray diffraction (WAXD) and small-angle light scattering (SALS) experiments show that the crystal form does not change, whereas the perfection of spherulites degrades in the presence of sorbitol. In addition to the obvious difference in crystalline morphology, observed by scanning electron microscopy, the spherulites in the LDPE/sorbitol sample are smaller in size and more in number than those of LDPE. It is well known that in semicrystalline polymers, impurities are expelled from crystalline regions into amorphous regions or interfaces of spherulites. The decrease of space charges can probably be attributed to the uniform distribution of impurities in the whole material, with smaller and imperfect spherulites.
charge distribution, polyethylene, Sorbitol, nonisothermal crystallization, SALS
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【期刊论文】Influence of Microstructure on Space Charges of Polypropylene
杜强国, XIANG LI, , QIANGGUO DU, JIE KANG, DEMIN TU
Journal of Polymer Science: Part B: Polymer Physics, Vol. 40, 365-374 (2002),-0001,():
-1年11月30日
The correlation of chemical structure, crystalline morphology, and space charge distribution under a dc electrical field was investigated with three kinds of poly(propylene) (PP) with a different chemical structure, that is, homogeneous PP and block copolymer and random copolymer of PP. The space charge distribution of the samples was prominently affected by their chemical sequence structure and crystalline microstructure. Among samples of different PPs, all isothermally crystallized at 140℃, the sample of random coPP represents the most well proportional space charge distribution and the smallest number of space charges. The effect of thermal history on the space charge distribution was also investigated by the samples of block coPP. The sample thermally treated at 50℃ clearly represents a better proportional distribution than that at higher temperature of 140 and 100℃. Subsequent experiments indicate that the better proportional distribution attributes to imperfect and fine sperulites with the fine distribution of the "amorphous" region. The imperfect and fine sperulites originate from the random incorporation of ethylene segments or units into PP chains or fromthe low annealing temperature, and play an important role in the formation of shallowtraps and transportation of space charges.
charge transport, poly(, propylene), (, PP), , structure, morphology
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【期刊论文】Properties of Polyimide/Silica Nanohybrids from Silicic Acid Oligomer
杜强国, Haitao Wang, Wei Zhong, *, Peng Xu, Qiangguo Du*
Macromol. Mater. Eng. 2004, 289, 793-799,-0001,():
-1年11月30日
Anewmethod to synthesize polyimide (PI)/silica nanohybrids has been presented. It uses silicic acid oligomer as the silica precursor, which was obtained by extracting with tetrahydrofuran (THF) from PH-adjusted water glass. The films of PI/silica nanohybrids remained transparent even at high silica content due to the formation of nanometer-scaled SiO2 particles at the addition of γ-aminopropyltriethoxysilane (APTES). In comparison with pure PI, PI/silica hybrids showed improved thermal stability and mechanical properties, and lower linear coefficients of thermal expansion (CTEs). The glass transition temperatures of the hybrids were increased with increasing content of silica or APTES as a result of the increasing limitation to the movements of the PI backbone.
polyimide/, silica nanohybrid, SEM, silicic acid oligomer, transparency, water glass
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杜强国, Liang Shen, Yijian Lin, Qiangguo Du*, Wei Zhong, Yuliang Yang
Polymer 46(2005)5758-5766,-0001,():
-1年11月30日
The polyamide-6/attapulgite nanocomposites were prepared via an in situ polymerization route with attapulgites pre-modified with cetyltrimethylammonium bromide (CTAB) and toluene-2,4-diisocyanate (TDI). Morphology observation showed that the exfoliated attapulgite fibers were well dispersed in the polyamide-6 matrix on a nanometer scale and formed a percolation network structure. The rheological behaviors of such polymer/fibrous clay nanocompostie samples were investigated by an ARES rheometer with parallel plate geometry. The storage moduli (G0), loss moduli (G00), and dynamic viscosities of these samples increased monotonically with attapulgite content at low frequencies. The presence of attapulgites caused these nanocomposite melts to have solid-like behaviors and slower relaxation. This behavior can be explained in terms of the development of a grafting-percolated fibrous-silicate network structure. Monte Carlo simulations were performed to determine the critical threshold for attapulgites fibers in 3D. The calculated critical threshold from simulations fitted the results of our rheological experiments very well.
Polyamide/, silicate nanocomposite, Rheology, Percolation
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杜强国, Haitao Wang, Peng Xu, Wei Zhong*, Liang Shen, Qiangguo Du*
Polymer Degradation and Stability 87(2005)319-327,-0001,():
-1年11月30日
Nanocomposites from poly(methyl methacrylate) (PMMA), silica (SiO2) and zirconia (ZrO2) were prepared using a novel nonhydrolytic sol-gel process. Silicic acid and zirconium oxychloride (ZrOCl2 8H2O) were used as the precursors of SiO2 and ZrO2, respectively. FT-IR and SEM results showed that nanometre-scaled SiO2/ZrO2 particles were uniformly distributed in and covalently bonded to the PMMA host matrix without macroscopic organiceinorganic phase separation, which was also confirmed by solvent extraction experiments. It was found that the transmittance of the nanocomposite films in the visible region remained above 95% even at 20wt% inorganic content and increased proportionally with decreasing inorganic content. The thermal stability and the thermal decomposition kinetics of the composites were studied. The results indicated that the activation energy (Ea) of the thermal decomposition of PMMA main chains in the composites was increased due to the addition of inorganic moieties. This kind of composite material may have the potential for applications in optical devices.
PMMA, Silica, Zirconia, Nanocomposites, Organiceinorganic
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