Influence of acrylic adhesive viscosity and surface roughness on the properties of adhesive joint

Paz Jiménez, Eva and Narbón Prieto, Julián José and Abenójar Buendía, Jesús and Cledera Castro, María del Mar and Real Romero, Juan Carlos del (2016). Influence of acrylic adhesive viscosity and surface roughness on the properties of adhesive joint. "Journal of Adhesion", v. 92 (n. 11); pp. 877-891. ISSN 0021-8464. https://doi.org/10.1080/00218464.2015.1051221.

Description

Title: Influence of acrylic adhesive viscosity and surface roughness on the properties of adhesive joint
Author/s:
  • Paz Jiménez, Eva
  • Narbón Prieto, Julián José
  • Abenójar Buendía, Jesús
  • Cledera Castro, María del Mar
  • Real Romero, Juan Carlos del
Item Type: Article
Título de Revista/Publicación: Journal of Adhesion
Date: November 2016
ISSN: 0021-8464
Volume: 92
Subjects:
Freetext Keywords: Lap-shear; Structural acrylics; Surface roughness; Rheology; Wetting
Faculty: E.T.S.I. Diseño Industrial (UPM)
Department: Ingeniería Mecánica, Química y Diseño Industrial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In adhesion, the wetting process depends on three fundamental factors: the surface topography of the adherend, the viscosity of the adhesive, and the surface energy of both. The aim of this paper is to study the influence of viscosity and surface roughness on the wetting and their effect on the bond strength. For this purpose, an acrylic adhesive with different viscosities was synthesized and some properties, such as viscosity and surface tension, were studied before adhesive curing took place. Furthermore, the contact angle and the lap-shear strength were analyzed using aluminum adherends with two different roughnesses. Scanning electron microscopy was used to determine the effect of the viscosity and the roughness on the joint interface. The results showed that the adhesive exhibits an optimal value of viscosity. Below this value, at low viscosities, the low neoprene content produces poor bond strength due to the reduced toughness of the adhesive. Additionally, it also produces a high shrinkage during curing, which leads to the apparition of residual stresses that weakens the interfacial strength. However, once the optimum value, an increase in the viscosity produces a negative effect on the joint strength as a result of an important decrease in the wettability.

More information

Item ID: 40651
DC Identifier: http://oa.upm.es/40651/
OAI Identifier: oai:oa.upm.es:40651
DOI: 10.1080/00218464.2015.1051221
Official URL: https://doi.org/10.1080/00218464.2015.1051221
Deposited by: Memoria Investigacion
Deposited on: 31 May 2016 08:41
Last Modified: 04 Oct 2019 07:17
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