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【期刊论文】Synthesis, Characterization, and Degradation Behavior of Amphiphilic Poly-r,
程巳雪, Zhi-Mei Miao, Si-Xue Cheng, Xian-Zheng Zhang, and Ren-Xi Zhuo*
Biomacromolecules 2005, 6, 3449-3457,-0001,():
-1年11月30日
A series of biodegradable amphiphilic graft polymers were successfully synthesized by grafting poly( -caprolactone) (PCL) sequences onto a water-soluble poly-R,
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【期刊论文】Synthesis and Characterization of Biodegradable Cholesteryl End-Capped Polycarbonates
程巳雪, Tao Wan, Tao Zou, Si-Xue Cheng, * and Ren-Xi Zhuo
Biomacromolecules 2005, 6, 524-529,-0001,():
-1年11月30日
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【期刊论文】Destabilization of Liposomes by Uncharged Hydrophilic and Amphiphilic Polymers
程巳雪, Ling Zhang, Tao Peng, Si-Xue Cheng, * and Ren-Xi Zhuo
J. Phys. Chem. B 2004, 108, 7763-7770,-0001,():
-1年11月30日
The destabilization effect of a hydrophilic polymer, poly-R,
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程巳雪, Si-Xue Cheng† and Tai-Shung Chung*, †, ‡
J. Phys. Chem. B 1999, 103, 4923-4932,-0001,():
-1年11月30日
Using a novel thin film polymerization technique, we have observed the phase separation, coalescence, and annihilation of liquid crystal textures during polymerization of wholly aromatic main-chain liquid crystalline polymer poly(p-oxybenzoate/2,6-oxynaphthoate) (P(OBA/ONA)). The polycondensation reaction was conducted and observed in situ on the heating stage of a polarizing microscope. After the melting of monomers, the reaction system started from a homogeneous phase and then changed into a heterogeneous one. The following morphological changes during the entire reaction were observed: generation of anisotropic phase, coalescence of liquid crystal domains, formation of schlieren texture, annihilation of disclinations, and formation of stripe texture. We found all the liquid crystal domains formed in the isotropic melt during the early stage of our polymerization reactions had the disclination strength of +1. The number of defects decreased with increasing reaction time through coalescence and annihilation. At the early stage of polymerization, the dominant factor affecting annihilation rate was the viscosity characteristics at elevated temperatures.
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