An experimentalist's view of the physics of rubber elasticity

Urayama, Kenji

doi:10.1002/polb.21010

Cited by 61 publications

(40 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, the inherent pulley effect arising from freely movable cross-links provides significantly different mechanical properties from the fixed cross-linking junctions. 95 Next, we consider the biaxial deformation of the cross-linked polymeric materials and balloon inflation. In the fixed junction model, the dependence of the surface tension on the extension ratio is given by:…”

Section: Mechanical Properties Of Slide-ring Gelsmentioning

confidence: 99%

Novel Cross-Linking Concept of Polymer Network: Synthesis, Structure, and Properties of Slide-Ring Gels with Freely Movable Junctions

Ito

2007

Polym J

365

300

View full text Add to dashboard Cite

ABSTRACT:We have recently developed a novel type of gel called the slide-ring gel or topological gel that is different from physical and chemical gels by using the supramolecular architecture with topological characteristics. In this gel, polymer chains with bulky end groups exhibit neither covalently cross-links as in chemical gels nor attractive interactions as in physical gels but are topologically interlocked by figure-of-eight cross-links. Hence, these crosslinks can pass along the polymer chains freely to equalize the tension of the threading polymer chains similarly to pulleys; this is called the pulley effect. The slide-ring gel is a new cross-linking concept for the polymer network as well as a real example of a slip-link model or sliding gel, which was previously considered only theoretically. In this study, we review the synthesis, structure, and mechanical properties of the slide-ring gels with freely movable cross-linking junctions based primarily on our recent studies. The pulley effect of the slide-ring gels has been recently confirmed by mechanical measurements, small-angle neutron scattering (SANS), small-angle X-ray scattering (SAXS), quasi-elastic light scattering (QELS), etc. This concept can be applied to not only gels but also to a wide variety of polymeric materials without solvents.

show abstract

Section: Mechanical Properties Of Slide-ring Gelsmentioning

confidence: 99%

Novel Cross-Linking Concept of Polymer Network: Synthesis, Structure, and Properties of Slide-Ring Gels with Freely Movable Junctions

Ito

2007

Polym J

365

300

View full text Add to dashboard Cite

show abstract

“…Since the gel sandwiched by rigid electrodes cannot distort in the direction of the electric field, the reorientation of the LCs is also severely restricted. We immersed the LC gels in a sealed, thick-gap cell filled with silicone oil, a non-solvent for the gels, to ensure the deformability of the gels [34][35][36]. In this setup, we were able to observe clearly a macroscopic deformation caused by the rotation of the director in unconstrained conditions ( Fig.…”

Section: Electric Field Response Of Liquid Crystal Gels and Lcesmentioning

confidence: 95%

Physics of Liquid Crystals

Tabe

Urayama

Matsuyama³

et al. 2014

The Liquid Crystal Display Story

Self Cite

View full text Add to dashboard Cite

“…The molecular structure of elastomers can be imagined as Figure 16 and the dots represent cross-links. When the stress is removed, B configuration will return to the original A configuration [12]. This elasticity is derived from the long chains to reconfigure themselves to distribute an applied stress.…”

Section: Reliability Evaluationmentioning

confidence: 99%

Mechanism of Solder Joint Cracks in Anisotropic Conductive Films Bonding and Solutions: Delaying Hot-Bar Lift-Up Time and Adding Silica Fillers

Zhang

Yang²,

Jin

et al. 2018

Metals

View full text Add to dashboard Cite

Micron sizes solder metallurgical joints have been applied in a thin film application of anisotropic conductive film and benefited three general advantages, such as lower joint resistance, higher power handling capability, and reliability, when compared with pressure based contact of metal conductor balls. Recently, flex-on-board interconnection has become more and more popular for mobile electronic applications. However, crack formation of the solder joint crack was occurred at low temperature curable acrylic polymer resins after bonding processes. In this study, the mechanism of SnBi58 solder joint crack at low temperature curable acrylic adhesive was investigated. In addition, SnBi58 solder joint cracks can be significantly removed by increasing the storage modulus of adhesives instead of coefficient of thermal expansion. The first approach of reducing the amount of polymer rebound can be achieved by using an ultrasonic bonding method to maintain a bonding pressure on the SnBi58 solder joints cooling to room temperature. The second approach is to increase storage modulus of adhesives by adding silica filler into acrylic polymer resins to prevent the solder joint from cracking. Finally, excellent acrylic based SnBi58 solder joints reliability were obtained after 1000 cycles thermal cycling test.

show abstract

An experimentalist's view of the physics of rubber elasticity

Cited by 61 publications

References 30 publications

Novel Cross-Linking Concept of Polymer Network: Synthesis, Structure, and Properties of Slide-Ring Gels with Freely Movable Junctions

Novel Cross-Linking Concept of Polymer Network: Synthesis, Structure, and Properties of Slide-Ring Gels with Freely Movable Junctions

Physics of Liquid Crystals

Mechanism of Solder Joint Cracks in Anisotropic Conductive Films Bonding and Solutions: Delaying Hot-Bar Lift-Up Time and Adding Silica Fillers

Contact Info

Product

Resources

About