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58. Morphology,mechanical properties and fracture behavior of epoxy/organoclay nanocomposites. L.Wang,P.F.Lv,T.X.Liu*,et al. Scientific Israel-Technological Advantages, 7(1-2),Oct.2005.(Invited Paper)
To be provided under request.
http://www.polymer.cn//ss/liutianxi/publicationsshow_427.html |
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50. Melt-Processable Poly(etherimide) Nanocomposites from Natural Montmorillonite. Y.J.Tong, I.Y.Phang, J.C.Huang, L.Shen, T.X.Liu*, et al. Mater. Res. Innov., 9(2), 291-305, 2005.
Poly(etherimide) (PEI) nanocomposites have been prepared with different loadings of unmodified natural clay by high-temperature (320°C) melt-compounding approach using twin-screw extruder. Coexistence of the exfoliated/intercalated clay morphologies within the nanocomposites is confirmed by combining X-ray scattering and microscopy. The glass transition temperature, the thermal stability and the ...
http://www.polymer.cn//ss/liutianxi/publicationsshow_287.html |
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42. Isolation and X-ray crystallographic structure of cyclic tetramer based on bisphenol A and o-phthaloyl dichloride. Jiang HY, Liu TX, et al. CHEM. J. CHIN. UNIV.-CHINESE 17(8): 1310-1313, 1996.
The polycrystalline powder of the cyclic tetramer based on bisphenol A and o-phthaloyldichloride has been prepared by recrystallization from nitrobenzene and its crystal structure has been determined by Wide-Angle X-ray Diffraction (WAXD). The unit cell is orthorhombic and its dimensions a = 0.967 6 nm, b = 0.869 9 nm, c = 2.085 9 nm, Space group belongs to Pmmm, With two tetramers per unit cell,t...
http://www.polymer.cn//ss/liutianxi/publicationsshow_176.html |
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40. The crystal structure and drawing induced polymorphism in poly(aryl ether ketone)s .3. Crystallization during ...... Wang S, Liu TX, et al. MACROMOL.RAPID COMMUN.18(2):83-91,1997.
The evolution of crystallinity and polymorphism during hot-drawing of amorphous poly(ether ether ketone ketone) (PEEKK) as a function of strain rate, draw ratio, and temperature was investigated. In modification I, the competition of chain extension and molecular alignment is responsible for the strain rate and temperature dependence. Modification II crystallization is basically controlled by chai...
http://www.polymer.cn//ss/liutianxi/publicationsshow_172.html |
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23. Transmission electron microscopy observations on fine structures of shish-kebab crystals of isotactic polystyrene by partial melting. Liu TX*, et al. J. CRYSTAL GROWTH 243 (1): 218-223, 2002.
The composite morphology and melting behavior of isothermally cold-crystallized isotactic polystyrene (iPS) shish-kebab crystals have been studied by transmission electron microscopy (TEM). The fine structures of iPS shish-kebabs are reflected at lamellar resolution by partial melting treatment using bright- and dark-field imaging modes. TEM observations indicate that the entire shish-kebab entity...
http://www.polymer.cn//ss/liutianxi/publicationsshow_141.html |
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11. Morphology, thermal and mechanical properties of nylon 12/organoclay nanocomposites prepared by melt compounding. Phang IY, Liu TX*, et al. POLYM. INT. 54 (2): 456-464, 2005.
Nylon 12 (PA12) nanocomposites with different organoclay loadings were successfully prepared by melt compounding. X-ray diffraction indicated the dominance of the exfoliated clay morphology throughout the matrix after mixing in a Brabender twin-screw extruder, in accordance with transmission electron microscopy observations. Thermogravimetric analysis showed that the thermal stability of the PA12 ...
http://www.polymer.cn//ss/liutianxi/publicationsshow_125.html |
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铸锭铝合金Al-Cu-Mg-Ti高应变速率超塑性
关键字：超塑性 高应变速率 铝合金
采用常规熔铸、热处理、小挤压比挤压及轧制这一低成本并适合于工业化规模应用的路线，研制了一种具有高应变速率超塑性的铸锭铝合金Al-Cu-Mg-Ti。拉伸试验结果表明：在温度为793K、初始应变速率为3.16×10-1s-1的拉伸变形条件下，其超塑伸长率为218%，流变应力为32.5MPa。断面及表面形貌SEM分析和初熔行为的DSC分析表明，该合金高应变速率超塑性变形来自于晶界滑动和位错滑移，与液相没有关系。
http://www.polymer.cn/research/ct_info187 |
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Al ( III ) 对丝素蛋白和Aβ42构象转变的影响及姜黄素的干预作用
老年痴呆症已成为一种致死率较高的神经退行性疾病，其主要病理特征是，源于淀粉样蛋白前体的Aβ 多肤在脑内错误折叠而纤维化沉积，从而导致神经炎斑和老年斑。研究表明，金属离子Cu2+、Fe3+、Zn2+、A13+等能促进Aβ多肽的纤维化过程。有报道称，姜黄素能与金属离子发生络合作用，对老年痴呆症有治疗功效。
http://www.polymer.cn/research/dis_info13270 |
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(Salan)Al催化剂活性种结构研究
关键字：丙交酯，活性种，立体选择性，开环聚合
聚乳酸是一种原料来源可再生、产品可生物降解、生物相容性好的绿色高分子材料。聚乳酸可由丙交酯的开环聚合来制备，丙交酯有三种立体异构体，包括左旋（LLA）、右旋（DLA）和内消旋丙交酯（meso-LA），而LLA与DLA的等量混合物被称为外消旋丙交酯（rac-LA）。近年以来，人们报道了多种丙交酯开环聚合的催化剂，其中Gibson 等人报道的(Salan)Al 催化剂（Fig. 1）对外消旋丙交酯的开环聚合具有高度的立体选择性[4]，随...
http://www.polymer.cn/research/dis_info10643 |
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EFFECT OF Mg-Al LAYERED DOUBLE HYDROXIDE ON THERMAL PROPERTIES OF EMAA NANOCOMPOSITES VIA MELT COMPOUNDING
关键字：layered double hydroxide; poly(ethylene-co-methacrylic acid); nanocomposites;melt compounding
Layered double hydroxides (LDHs) is a family of inorganic fillers with layered structure. In the paper, poly (ethylene co methacrylic acid) (EMAA) MgAl layered double hydroxide (LDH) nanocomposites were prepared via melt compounding us...
http://www.polymer.cn/research/dis_info8533 |
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