The Effects of Network Structure on the Resistance of Silane Coupling Agent Layers to Water-Assisted Crack Growth

Langmuir ◽  
2004 ◽  
Vol 20 (8) ◽  
pp. 3246-3258 ◽  
Author(s):  
J. J. Benkoski ◽  
E. J. Kramer ◽  
H. Yim ◽  
M. S. Kent ◽  
J. Hall
Keyword(s):  
Crack Growth ◽  
Network Structure ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Silane Coupling

Studies of Polymer-Filler Interaction, Network Structure, Physical Properties, and Fracture of Silica-and Clay-Filled EPDM Rubber in the Presence of a Silane Coupling Agent

1983 ◽  
Vol 56 (4) ◽  
pp. 737-773 ◽  
Author(s):  
P. K. Pal ◽  
S. K. De
Keyword(s):  
Physical Properties ◽  
Network Structure ◽  
Coupling Agent ◽  
Crosslink Density ◽  
Silane Coupling Agent ◽  
Interaction Network ◽  
Epdm Rubber ◽  
Polymer Filler ◽  
Silane Coupling ◽  
Tear Properties

Abstract 1. A silane coupling agent (Si-69) reduces the viscosity and increases the scorch lime in silica- and clay-filled EPDM. The cure lime of silica-filled mixes remained unchanged and that of clay-filled mixes increased on addition of Si-69. 2. In the presence of Si-69, the silica-EPDM system exhibits higher polymer-filler interaction than the clay-EPDM system. 3. Vulcanizates containing Si-69 exhibit higher apparent crosslink density and a higher proportion of polysulfidic crosslinks than the control vulcanizates. 4. Vulcanizates containing Si-69 show improved physical properties. Lower tensile and tear properties in vulcanizates with Si-69 at higher filler loadings is explained via a slippage mechanism. 5. SEM studies of fractured surfaces created under tension, tear, flexing, and abrasion have been made, and changes in the strength of the vulcanizates have been correlated with the fractographs.

Effect of Reinforcing Silica on Vulcanization, Network Structure, and Technical Properties of Natural Rubber

1982 ◽  
Vol 55 (5) ◽  
pp. 1370-1388 ◽  
Author(s):  
P. K. Pal ◽  
S. K. De
Keyword(s):  
Network Structure ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Scanning Electron Micrographs ◽  
Polymer Filler ◽  
Silica Filler ◽  
Silane Coupling ◽  
Aging Resistance ◽  
Failure Properties ◽  
Technical Properties

Abstract Reinforcement of silica filler in NR in the presence of a silane coupling agent (Si-69), and an additive (TEA) has been analyzed by studies on swelling of the vulcanizate, network structure, technical properties, and scanning electron micrographs. Failure properties in the presence of a coupling agent have been explained on the basis of coupling (polymer-filler) bonds. Improved flex endurance in the presence of TEA has been explained on the basis of good dispersion and better aging resistance of the TEA compounds. Network structure of the rubber during vulcanization undergoes only minor changes on addition of silica filler in the presence of both coupling agent and additive.

scholarly journals Improved Hydrophobicity of Macroalgae Biopolymer Film Incorporated with Kenaf Derived CNF Using Silane Coupling Agent

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2254
Author(s):  
Adeleke A. Oyekanmi ◽  
N. I. Saharudin ◽  
Che Mohamad Hazwan ◽  
Abdul Khalil H. P. S. ◽  
Niyi G. Olaiya ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Cellulose Nanofibrils ◽  
Hydroxyl Groups ◽  
Water Contact ◽  
Silane Coupling ◽  
Cnf Films ◽  
Kenaf Bast ◽  
Thermal Stability Of

Hydrophilic behaviour of carrageenan macroalgae biopolymer, due to hydroxyl groups, has limited its applications, especially for packaging. In this study, macroalgae were reinforced with cellulose nanofibrils (CNFs) isolated from kenaf bast fibres. The macroalgae CNF film was after that treated with silane for hydrophobicity enhancement. The wettability and functional properties of unmodified macroalgae CNF films were compared with silane-modified macroalgae CNF films. Characterisation of the unmodified and modified biopolymers films was investigated. The atomic force microscope (AFM), SEM morphology, tensile properties, water contact angle, and thermal behaviour of the biofilms showed that the incorporation of Kenaf bast CNF remarkably increased the strength, moisture resistance, and thermal stability of the macroalgae biopolymer films. Moreover, the films’ modification using a silane coupling agent further enhanced the strength and thermal stability of the films apart from improved water-resistance of the biopolymer films compared to unmodified films. The morphology and AFM showed good interfacial interaction of the components of the biopolymer films. The modified biopolymer films exhibited significantly improved hydrophobic properties compared to the unmodified films due to the enhanced dispersion resulting from the silane treatment. The improved biopolymer films can potentially be utilised as packaging materials.

Sign in / Sign up

Export Citation Format

Share Document