Search Results - "Cheng, S. Z. D."

Structure of Liquid Crystal Droplets with Chiral Propeller Texture by Yang, Deng-Ke, Jeong, Kwang-Un, Cheng, S. Z. D

“…We experimentally studied a nematic liquid crystal whose molecules form twisted head-to-head H-bonded dimers. We observed that when the material transformed…”
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Structure of Negative Spherulites of Even–Even Polyamides. Introducing a Complex Multicomponent Spherulite Architecture by Lotz, B, Cheng, S. Z. D, Li, C. Y

“…Even–even polyamides are known to grow as positive spherulites, which implies that the radial, fastest growth direction is parallel to the a-axis and hydrogen…”
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Hierarchical Control of Internal Superstructure, Diameter, and Stability of Supramolecular and Macromolecular Columns Generated from Tapered Monodendritic Building Blocks by Percec, V, Schlueter, D, Ungar, G, Cheng, S. Z. D, Zhang, A

“…The synthesis of the first generation AB 3 monodendrons 3,4,5-tris[6-alkyloxy-2-methylnaphthyloxy]benzoic acid (with decyl, dodecyl, tetradecyl, and hexadecyl…”
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Crystal transitions of Nylon 11 under drawing and annealing by Zhang, Qingxin, Mo, Zhishen, Zhang, Hongfang, Liu, Siyang, Cheng, S.Z.D.

“…The crystal transitions of Nylon 11 annealed and drawn at different temperatures (Td) with different drawing ratios (n) were investigated by wide-angle X-ray…”
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Research in Macromolecular Science: Challenges and Opportunities for the Next Decade by Ober, C. K, Cheng, S. Z. D, Hammond, P. T, Muthukumar, M, Reichmanis, E, Wooley, K. L, Lodge, T. P

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Polymorphism in Syndiotactic Polypropylene:  Thermodynamic Stable Regions for Form I and Form II in Pressure−Temperature Phase Diagram by Rastogi, S, La Camera, D, van der Burgt, F, Terry, A. E, Cheng, S. Z. D

“…Polymorphism is a general phenomenon observed in polymers. Syndiotactic polypropylene also exhibits polymorphism, and four limited-ordered modifications have…”
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Visualizable Cylindrical Macromolecules with Controlled Stiffness from Backbones Containing Libraries of Self-Assembling Dendritic Side Groups by Percec, V, Ahn, C.-H, Cho, W.-D, Jamieson, A. M, Kim, J, Leman, T, Schmidt, M, Gerle, M, Möller, M, Prokhorova, S. A, Sheiko, S. S, Cheng, S. Z. D, Zhang, A, Ungar, G, Yeardley, D. J. P

“…The synthesis and structural analysis of a library containing 13 taper- and conical-shaped self-assembling dendrons, 16 dendritic monomers, and their…”
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Construction of Chiral Propeller Architectures from Achiral Molecules by Jeong, K.-U., Yang, D.-K., Graham, M. J., Tu, Y., Kuo, S.-W., Knapp, B. S., Harris, F. W., Cheng, S. Z. D.

“…Chiral propeller architectures (see figure and inside cover) are constructed from achiral molecules via hydrogen bonding self‐assembly in addition to…”
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A critical assessment of unbalanced surface stresses as the mechanical origin of twisting and scrolling of polymer crystals by Lotz, Bernard, Cheng, Stephen Z.D.

“…Twisting of polymer lamellae manifested by e.g. appearance of concentric bands in polymer spherulites examined in a polarized optical microscope remains a…”
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Monotropic liquid crystal behavior in two poly(ester imides) with even and odd flexible spacers by Pardey, Ricardo, Zhang, Anqiu, Gabori, Patricia A, Harris, Frank W, Cheng, Stephen Z. D, Adduci, Jerry, Facinelli, John V, Lenz, Robert W

“…Mesophase behavior of two poly(ester imides) synthesized from N-\4-(chloroformyl)phenyl\-4-(chloroformyl)phthalimide and 1,4-butanediol or 1,9-nonanediol has…”
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Ordered structures in a series of liquid crystalline poly(ester imide)s by PARDEY, R, DEXING SHEN, GABORI, P. A, HARRIS, F. W, CHENG, S. Z. D, ADDUCI, J, FACINELLI, J. V, LENZ, R. W

“…A series of poly(ester imide)s(PEIMs) has been synthesized from N-\4-(chloroformyl)phynyl\-4-(chloroformyl)phthalimide and different diols with methylene units…”
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Regime transitions in fractions of isotactic polypropylene by Cheng, Stephen Z. D, Janimak, James J, Zhang, Anqiu, Cheng, H. N

“…Crystal growth rates of spherulites or axialities of low molecular mass (MW = 15 000) and high molecular mass (MW = 300 000) isotactic polypropylene (i-PP)…”
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High-performance aromatic polyimide fibres. Part V Compressive properties of BPDA-DMB fibre by LI, W, WU, Z, JIANG, H, EASHOO, M, HARRIS, F. W, CHENG, S. Z. D

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Enthalpic and entropic origins of nucleation barriers during polymer crystallization: the Hoffman–Lauritzen theory and beyond by Cheng, Stephen Z.D., Lotz, Bernard

“…In the search for a greater understanding of polymer crystallization, numerous experimental observations with regards to microscopic structures and macroscopic…”
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Mesophase behavior in thermotropic polyethers based on the semiflexible mesogen 1-(4-hydroxyphenyl)-2-(2-methyl-4-hydroxyphenyl)ethane by YANDRASITS, M. A, CHENG, S. Z. D, ZHANG, A, CHENG, J, WUNDERLICH, B, PERCEC, V

“…A series of thermotropic polyethers consisting of a semiflexible mesogen \1-(4-hydroxyphenyl)-2-(2-methyl-4-hydroxyphenyl)ethane\ with methylene flexible…”
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Phase structures, transition behavior and surface alignment in polymers containing rigid-rod backbones with flexible side chains. Part VI Novel band structures in a combined main-chain/side-chain liquid crystalline polyester : From liquid crystal to crystalline states by GE, J. J, ZHANG, J. Z, WENSHENG ZHOU, LI, C. Y, SHI JIN, CALHOUN, B. H, WANG, Shy-Yeu, HARRIS, F. W, CHENG, S. Z. D

“…Physical origins of banded structures appearing on different length scales have been investigated using polarized light and atomic force microscopies (PLM and…”
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Gel/sol and liquid-crystalline transitions in solution of a rigid-rod polyimide by Cheng, Stephen Z. D., Lee, Sung Koo, Barley, Jeffrey S., Hsu, Steven L. C., Harris, Frank W.

“…A soluble, rigid-rod polyimide has been synthesized from 3,6-diphenylpyromellitic dianhydride (DPPMDA) and 2,2'-bis(trifluoromethyl)-4,4'-diaminobiphenyl…”
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Glass transition and melting behavior of poly(oxy-2,6-dimethyl-1,4-phenylene) by Cheng, Stephen Z. D, Wunderlich, Bernhard

“…Thermal analysis of amorphous and semicrystalline poly(oxy-2,6-dimethyl-1,4-phenylene) (PPO) has been carried out from 220-580K. In the solid state, glassy and…”
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Kinetics of mesophase transitions in thermotropic copolyesters. V: A copolyester containing TPA/PHQ/HBA by JOHNSON, R. L, CHENG, S. Z. D

“…The copolyester consisting of 90 mol% phenylhdroquinone terephthalate (TPA/PHQ) and 10 mol% hydroxybenzoic acid (HBA) has been studied by differential scanning…”
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Structure Evolution and Kinetics of Thermoreversible Gelation in a Rigid-Rod Polyimide/m-Cresol System by Kyu, Thein, Yang, Jen-Chang, Cheng, Stephen Z. D, Hsu, Steven L. C, Harris, Frank W

“…Biphenyltetracarboxylic dianhydride--(perfluoromethyl) benzidine (BPDA--PFMB) polyimide/m-cresol solutions showed thermoreversible gelation associated with…”
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