期刊文献+

压力对高分子液-液相转变行为的影响 被引量:2

原文传递
导出
摘要 高分子研究在实际应用和基础研究方面不断发展,压力对高分子转变行为的影响越来越受到人们的重视.在理论研究方面最成功的处理方法是把自由体积和体系的自由能或状态方程结合在一起,从而定量地推导出不同压力下的临界温度和χ(Flory-Huggins相互作用参数),代表性的结果为Sanchez-Lacombe状态方程和SAFT状态方程;大多数实验结果表明高分子体系的临界温度随压力的增加而升高,即对于在降低温度时发生相分离的UCST高分子混合体系升高压力会降低体系的相容性,而对于LCST体系(高分子混合体系在升高温度时发生相分离)压力能提高高分子体系的相容性.我们最近就压力作用下具有UCST行为的高分子体系实验结果发现,有的体系相分离温度随压力增加而升高,有的体系随压力增加而降低,还有的体系随组成的不同既有升高也有降低的现象,我们根据实验现象结合Sanchez-Lacombe格子流体理论对这一实验现象给出了理论解释.
出处 《科学通报》 EI CAS CSCD 北大核心 2005年第7期613-622,共10页 Chinese Science Bulletin
基金 国家自然科学基金(批准号:50303017,50373044) 国家自然科学基金重大项目(20490220,50390090) 国家973计划(批准号:2003CB615600)资助项目 中国科学院方向性项目(KJCX2-SW-H07).
  • 相关文献

参考文献117

  • 1蒙延峰,蒋世春,安立佳,姜炳政.聚苯乙烯/反式十氢化萘溶液在绝对负压下的相转变[J].高分子学报,2003,13(5):728-733. 被引量:1
  • 2蒙延峰,蒋世春,安立佳,姜炳政.具有最高共溶温度高分子共混体系的压力诱导相容性热力学研究[J].中国科学(B辑),2003,33(3):211-218. 被引量:3
  • 3Nelissen L, Nies E, Lemstra P J. Influence of pressure on the phase behavior of polymer blends: polystyrene/poly(2,6-dimethyl-1, 4-phenylene ether). Polym Commun, 1990, 31:122~123.
  • 4Rostami S, Walsh D J. Simulation of upper and lower critical phase diagrams for polymer mixtures at various pressures. Macromolecules, 1985,18:1228~1235.
  • 5Wolf B A, Blaum J. Dependence of oligomer-oligomer incompatibility on chain length and pressure i: oligoisobutene/oligo propylene gylcol and olico styrene/oligo ethylene glycol. Journal of Polymer Science: Polymer Symposium, 1977, 61:251.
  • 6Liu K, Kiran E. Pressure-induced phase separation in polymer solutions: Kinetics of phase separation and crossover from nucleation and growth to spinodal decomposition in solutions of polyethylene in n-pentane. Macromolecules, 2001, 34:3060~3068.
  • 7Nishi T, Wang T T, Kwei T K. Correction - thermally induced phase separation behavior of compatible polymer mixtures.Macromolecules, 1976, 9:690~690.
  • 8Hashimoto T, Kumaki J, Kawai H. Time-resolved light scattering studies on kinetics of phase separation and phase dissolution of polymer blends. 1. Kinetics of phase separation of a binary mixture of polystyrene and poly(vinyl methyl ether). Macromolecules,1983, 16:641~648.
  • 9Kyu T, Saldanha J M. Phase separation by spinodal decomposition in polycarbonate/poly(methyl methacrylate) blends. Macromolecules, 1988, 21:1021~1026.
  • 10Snyder H L, Meakin P. Phase separation dynamics: Comparison of experimental results. J Chem Phys, 1983, 79:5588~5594.

二级参考文献47

  • 1Janssen S, Schwaha D, Mortensen K, et al. Pressure-Dependence of the Florry-Huggins interaction parameter in polymer blends--A SANS study and a comparison to the Flory-Orwoll-Vrij equation of state. Macromolecules, 1993, 26(21):5587-5591.
  • 2Hammouda B, Bauer B J, Compressibility of 2 polymer blend mixtures. Macromolecules, 1995, 28(13): 4505-4508.
  • 3Hammouda B, Balsara N P, Lefebvre A A. Small-angle neutron scattering from pressurized polyethylbutylene/polymethylbutylene blends. Macromolecules, 1997, 30(18): 5572-5574.
  • 4An I, Horst R, Wolf B A. Pressure dependence of the miscibility of poly(vinyl methyl ether) and polystyrene: Theoretical representation. J Chem Phys, 1997, 107(7): 2597-2602.
  • 5Wolf B A, Blaum G. Dependence of oligomer-oligomer incompatibility on chain length and pressure I: Oligoisobutene/oligo propylene gylcol and olico styrene/oligo ethylene glycol. J Polym Sci Syrup, 1977, 61:251-270.
  • 6Kumar S K. Pressure effects on the thermodynamics of polymer blends. Macromolecules,2000,33(14):5285-5291.
  • 7Hajduk D A, Gruner S M, Erramilli S, et al. High-pressure effects on the order-disorder transition in block copolymer melts.Macromolecules, 1996, 29(5): 1473-1481.
  • 8Lefebvre K K, Lee J H, Balsara N P, et al. Relationship between internal energy and volume change of mixing in pressurized polymer blends. Macromolecules, 1999,32(16):5460-5462.
  • 9Beiner M, Fytas G, Meier G, et al. Pressure-induced compatibility in a model polymer blend. Phys Rev Lett, 1998, 81(3):594-597.
  • 10Rabeony M, Lohse D J, Garner R T, et al. Effect of pressure on polymer blend miscibility: A temperature-pressure superposition.Macromolecules,1998,31(19):6511-6514.

共引文献2

同被引文献8

引证文献2

二级引证文献7

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部