The Time-Temperature Superposition of Polymeric Rubber Gels Treated by Means of the Mode-Coupling Theory

被引：1

作者：

Mallamace, Domenico ^{[1
]}

Mensitieri, Giuseppe ^{[2
]}

de Luna, Martina Salzano ^{[2
]}

Mallamace, Francesco ^{[3
,4
]}

机构：

[1] Univ Messina, Dept ChiBioFarAm, Sect Ind Chem, CASPE INSTM, Vle F Stagno dAlcontres 31, I-98166 Messina, Italy

[2] Univ Naples Federico II, Dept Chem Mat & Prod Engn, Piazzale Tecchio 80, I-80125 Naples, Italy

[3] Univ Messina, Dept Matemat Fis Informat & Sci Terra, I-00185 Rome, Italy

[4] CNR, Ist Sistemi Complessi, I-00185 Rome, Italy

来源：

GELS | 2024年 / 10卷 / 05期

基金：

欧盟地平线“2020”;

关键词：

viscoelasticity; relaxations; polymeric gels; dynamical arrest; SUPERCOOLED LIQUIDS; GLASS-TRANSITION; RELAXATION; DEPENDENCE; VISCOSITY; DYNAMICS;

D O I：

10.3390/gels10050313

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Viscoelastic relaxation measurements on styrene-butadiene rubbers (SBRs) doped with carbon nanotube (CNT) at different concentrations around the sol-gel transition show the time-temperature superposition (TTS). This process is described in terms of the mode coupling theory (MCT) approach to viscoelasticity by considering the frequency behavior of the loss modulus E ''(omega) and showing that the corresponding TTS is linked to omega 1/2 decay. From the analysis of the obtained data, we observe that the interaction between SBRs and CNT determines different levels of decay according to their concentration. Systems with the lowest CNT concentration are only characterized in the studied T-range by their fragile glass-forming behavior. However, at a specific temperature TL, those with the highest CNT concentration show a crossover towards pure Arrhenius that, according to the MCT, indicates the presence of kinetic glass transition (KGT), where system response functions are characterized by scaling behaviors.

引用

页数：15

共 30 条

[1] ON TEMPERATURE DEPENDENCE OF COOPERATIVE RELAXATION PROPERTIES IN GLASS-FORMING LIQUIDS [J].