Thermoreversible sol–gel transition of low‐molecular weight gelling agents/polymer systems. II. Concentration dependence of gelling agents on the sol–gel transitions of isotactic polypropylene melt (abstract)

1991 ◽  
Vol 35 (4) ◽  
pp. 697-698
Author(s):  
Toshiaki Kobayashi ◽  
Masaoki Takahashi ◽  
Takeji Hashimoto
Keyword(s):  
Molecular Weight ◽  
Concentration Dependence ◽  
Isotactic Polypropylene ◽  
Sol Gel ◽  
Low Molecular Weight ◽  
Polymer Systems ◽  
Gelling Agents ◽  
Sol Gel Transition ◽  
Polypropylene Melt ◽  
Gel Transition

scholarly journals A Multiple Stimuli-Sensitive Low-Molecular-Weight Gel with an Aggregate-Induced Emission Effect for Sol-Gel Transition Detection

ChemistryOpen ◽  
2018 ◽  
Vol 7 (6) ◽  
pp. 457-462 ◽  
Author(s):  
Hao Wang ◽  
Qihong Liu ◽  
Yalong Hu ◽  
Miaochang Liu ◽  
Xiaobo Huang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Sol Gel ◽  
Low Molecular Weight ◽  
Emission Effect ◽  
Sol Gel Transition ◽  
Stimuli Sensitive ◽  
Gel Transition

scholarly journals Concentration Dependence of Mechanical Properties of Gelatin near the Sol-Gel Transition Point

1993 ◽  
Vol 57 (4) ◽  
pp. 532-535 ◽  
Author(s):  
Hitoshi Kumagai ◽  
Tomoyuki Fujii ◽  
Tetsuo Inukai ◽  
Toshimasa Yano
Keyword(s):  
Mechanical Properties ◽  
Concentration Dependence ◽  
Transition Point ◽  
Sol Gel ◽  
Sol Gel Transition ◽  
Gel Transition

Sol – Gel Modelling Associated with the Rheology of Polymeric Precursors of Ceramic Materials

2003 ◽  
Vol 13 (5) ◽  
pp. 251-258 ◽  
Author(s):  
Corneliu Balan ◽  
Ralf Riedel
Keyword(s):  
Reaction Time ◽  
Constitutive Relation ◽  
Sol Gel ◽  
Viscoelastic Behavior ◽  
Ceramic Materials ◽  
Avrami Equation ◽  
Creep Tests ◽  
Polymer Systems ◽  
Sol Gel Transition ◽  
Gel Transition

Abstract A general constitutive relation describing the change of viscoelastic behavior during the liquid - solid (sol - gel) transition which takes place in preceramic polymers is derived on the basis of Jeffrey’s 3-constants model with time dependent viscosities and elasticity. It is postulated that the sol - gel - transition can be analyzed analogous to the solutions of the Avrami equation used for modeling crystallization processes. Two different polymer systems used as precursor for the production of ceramic materials are investigated here: i) a mixture based on polysiloxane, alumatrane and isopropanol; ii) a non-oxidic carbodiimide gel based on the reaction of chlorosi-lanes with bis(trimethylsilyl)carbodiimide. Continuous measurements of the dynamic moduli versus reaction time, as well as creep tests at constant shear stress, evidenced both qualitative similarities and quantitative differences associated with the sol - gel transition of the two polymer systems. The shear rate and viscosity dependence of reaction time in creep tests, respectively the evolution of Lissajous figures associated with oscillatory experiments, are found to be consistent with the numerical simulations of the proposed constitutive relation.

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