Analysis of the adhesive strength variance in expoxy matrix-boron fiber joints

The results of complex studies on the development of a powder composition Ge–Cr–Zr–Ce–WC, promising for the production of functional cold-resistant coatings by microplasma sputtering, are presented. The coating has high adhesive strength (more than 40 MPa) and microhardness (up to 10–12 GPa) and withstands repeated thermal cycling in the temperature range from –60 to 20°С.

Download Full-text

Catechol-modified epoxy coatings with high adhesive strength on saturated concrete substrate

Iranian Polymer Journal ◽

10.1007/s13726-021-00899-9 ◽

2021 ◽

Author(s):

Dewen Sun ◽

Pingping Hou ◽

Bo Li ◽

Xiaodong Zhang

Keyword(s):

Adhesive Strength ◽

Epoxy Coatings ◽

Saturated Concrete ◽

Modified Epoxy ◽

High Adhesive Strength

Download Full-text

Adhesive Strength of Ni–Cu Surface Alloy Formation by Low-Energy High-Current Electron Beam

Russian Physics Journal ◽

10.1007/s11182-021-02237-1 ◽

2021 ◽

Vol 63 (10) ◽

pp. 1804-1809

Author(s):

E. V. Yakovlev ◽

A. B. Markov ◽

D. A. Shepel ◽

V. I. Petrov ◽

A. A. Neiman

Keyword(s):

Electron Beam ◽

Adhesive Strength ◽

Low Energy ◽

Surface Alloy ◽

Alloy Formation ◽

High Current ◽

High Current Electron Beam ◽

Current Electron ◽

High Current Electron

Download Full-text

Effect of the Process Parameters on the Adhesive Strength of Dissimilar Polymers Obtained by Multicomponent Injection Molding

Polymers ◽

10.3390/polym13071039 ◽

2021 ◽

Vol 13 (7) ◽

pp. 1039 ◽

Cited By ~ 1

Author(s):

Luciano Pisanu ◽

Leonardo Costa Santiago ◽

Josiane Dantas Viana Barbosa ◽

Valter Estevão Beal ◽

Marcio Luis Ferreira Nascimento

Keyword(s):

Adhesive Strength ◽

Natural Fiber ◽

Fiber Composite ◽

Pure Shear ◽

Central Area ◽

Dissimilar Materials ◽

Type I ◽

Coconut Fiber ◽

Adhesive Properties ◽

Experimental Conditions

The growing demand in the consumer market for products with sustainable technologies has motivated new applications using overmolded natural fiber composites. Therefore, studies have been conducted mainly to understand the adhesive properties of overmolded parts. In the present study, a polypropylene (PP) composite with 30% coconut fibers without additives was developed with the aid of a corotating twin screw extruder. Subsequently, a multicomponent injection mold was developed based on the geometry of the ISO 527 type I specimen, in which samples overmolded with PP and PP–coconut-fiber composite, with the overlap in the central area, were obtained to evaluate the adhesive strength of dissimilar materials. The objective of this study was to evaluate the bond between PP and PP–coconut-fiber composite under different processing conditions using an adhesive strength testing device to perform a pure shear analysis. The experimental conditions followed a statistical design considering four factors in two levels and a significance level of 5%. The results indicated that adhesive strength increased significantly as the overlap area increased. It was observed that temperature and injection flow rate were the factors that most contributed to strengthening the bonds of dissimilar materials.

Download Full-text

Differences in phosphatase modulation of α4 β1 and α5 β1 integrin-mediated adhesion and migration of B16F1 cells

Biochemistry and Cell Biology ◽

10.1139/o99-050 ◽

1999 ◽

Vol 77 (5) ◽

pp. 409-420 ◽

Cited By ~ 4

Author(s):

Dolores Hangan-Steinman ◽

Wai-chi Ho ◽

Priti Shenoy ◽

Bosco MC Chan ◽

Vincent L Morris

Keyword(s):

Cell Adhesion ◽

Adhesive Strength ◽

Cell Movement ◽

Protein Tyrosine Phosphatases ◽

Β1 Integrin ◽

Phosphatase Inhibitors ◽

Β1 Integrins ◽

Cell Adhesion And Migration ◽

And Migration ◽

B16f1 Cell

It is well established that a biphasic relationship exists between the adhesive strength of β1 integrins and their ability to mediate cell movement. Thus, cell movement increases progressively with adhesive strength, but beyond a certain point of optimal interaction, cell movement is reduced with further increases in adhesive function. The interplay between the various kinase and phosphatase activities provides the balance in β1 integrin-mediated cell adhesion and migration. In the present study, the significance of protein tyrosine phosphatases (PTP) and ser/thr protein phosphatases (PP) in α4β1 and α5β1 integrin-mediated mouse melanoma B16F1 cell anchorage and migration on fibronectin was characterized using phosphatase inhibitors. At low fibronectin concentration, α5β1 functioned as the predominant receptor for cell movement; a role for α4β1 in B16F1 cell migration increased progressively with fibronectin concentration. Treatment of B16F1 cells with PTP inhibitors, sodium orthovanadate (Na3VO4) and phenylarsine oxide (PAO), or PP-1/2A inhibitor, okadaic acid (OA), abolished cell movement. Inhibition of cell movement by PAO and OA was associated by a reduction in the adhesive strength of α4β1 and α5β1. In contrast, treatment of B16F1 cells with Na3VO4 resulted in selective stimulation of the adhesive function of α5β1, but not α4β1. Therefore, our results demonstrate that (i) both PTP and PP-1/2A have roles in cell movement, (ii) modulation of cell movement by PTP and PP-1/2A may involve either a stimulation or reduction of β1 integrin adhesive strength, and (iii) distinct phosphatase-mediated signaling pathways for differential regulation of the various β1 integrins exist. Key words: phosphatases, integrins, cell movement, cell adhesion.

Download Full-text

Adhesive strength of heat-resistant glass ceramic coatings with nichrome melts

Glass and Ceramics ◽

10.1007/bf00682692 ◽

1994 ◽

Vol 51 (2) ◽

pp. 85-90

Author(s):

A. P. Zubekhin ◽

V. A. Zhabrev ◽

A. M. Kondyurin

Keyword(s):

Adhesive Strength ◽

Glass Ceramic ◽

Ceramic Coatings ◽

Heat Resistant ◽

Glass Ceramic Coatings

Download Full-text