Determination of Relative Acidity of Wood and Adhesive Joints

1946 ◽  
Vol 18 (12) ◽  
pp. 775-777 ◽  
Author(s):  
F.A. DeMarco ◽  
E.A. Smith
Keyword(s):  
Adhesive Joints ◽  
Relative Acidity

scholarly journals Apparent Young’s Modulus of the Adhesive in Numerical Modeling of Adhesive Joints

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 328
Author(s):  
Kamil Anasiewicz ◽  
Józef Kuczmaszewski
Keyword(s):  
Numerical Model ◽  
Young’S Modulus ◽  
Adhesive Joint ◽  
Young's Modulus ◽  
Precise Determination ◽  
Adhesive Joints ◽  
Experimental Conditions ◽  
Element Simulation ◽  
Joint Material

This article is an evaluation of the phenomena occurring in adhesive joints during curing and their consequences. Considering changes in the values of Young’s modulus distributed along the joint thickness, and potential changes in adhesive strength in the cured state, the use of a numerical model may make it possible to improve finite element simulation effects and bring their results closer to experimental data. The results of a tensile test of a double overlap adhesive joint sample, performed using an extensometer, are presented. This test allowed for the precise determination of the shear modulus G of the cured adhesive under experimental conditions. Then, on the basis of the research carried out so far, a numerical model was built, taking the differences observed in the properties of the joint material into account. The stress distribution in a three-zone adhesive joint was analyzed in comparison to the standard numerical model in which the adhesive in the joint was treated as isotropic. It is proposed that a joint model with three-zones, differing in the Young’s modulus values, is more accurate for mapping the experimental results.

Determination of Traction Separation Law for Interfacial Failure in Adhesive Joints at Different Loading Rates

2015 ◽  
Vol 92 (10) ◽  
pp. 819-839 ◽  
Author(s):  
Chaitanya K. Desai ◽  
Sumit Basu ◽  
Venkitanarayanan Parameswaran
Keyword(s):  
Adhesive Joints ◽  
Interfacial Failure ◽  
Loading Rates

Theoretical determination of relative acidity in zeolite (faujasite)

1991 ◽  
Vol 95 (23) ◽  
pp. 9425-9431 ◽  
Author(s):  
E. Kassab ◽  
K. Seiti ◽  
M. Allavena
Keyword(s):  
Theoretical Determination ◽  
Relative Acidity

scholarly journals Mechanical Properties and Leak-Tightness of Polymeric Pipe Adhesive Joints

2022 ◽  
Vol 3 (1) ◽  
pp. 64-77
Author(s):  
Anna Rudawska ◽  
Magd Abdel Wahab ◽  
Miroslav Müller ◽  
Dana Stančeková
Keyword(s):  
Mechanical Properties ◽  
Polyvinyl Chloride ◽  
Epoxy Adhesive ◽  
Adhesive Joints ◽  
Cyanoacrylate Adhesive ◽  
Strength Tests ◽  
Two Component ◽  
Leak Tightness

This paper presents issues related to the determination of the selected mechanical properties of adhesive joints made of polymeric pipes and the evaluation of the leak-tightness of the adhesive joints. The article attempts to demonstrate that the type of adhesive may affect the quality of adhesive joints in terms of both tightness and strength of joints. Five types of the polymer pipes differing in a polypropylene and a polyvinyl chloride, diameter and a wall thickness were used in the experiments. Two types of the adhesives were used to make the adhesive joints: Loctite 3430 A&B Hysol, a two-component epoxy adhesive, and Loctite 406, a one-component cyanoacrylate adhesive. Based on the leak-tightness tests results, it was possible to determine the quality of their adhesive joints without damaging the samples, while their tensile strength was determined through the strength tests. The tests performed allowed for the conclusion that the use of the polyvinyl chloride pipes and Loctite 406 one-component adhesive is recommended for this type of adhesive joints.

Spectroscopic determination of relative Brønsted acidity as a predictor of reactivity in aprotic ionic liquids

2015 ◽  
Vol 51 (30) ◽  
pp. 6651-6654 ◽  
Author(s):  
Ariel I. Horowitz ◽  
Paola Arias ◽  
Matthew J. Panzer
Keyword(s):  
Ionic Liquids ◽  
Reaction Rates ◽  
Spectroscopic Determination ◽  
Bronsted Acids ◽  
Brønsted Acidity ◽  
Brönsted Acidity ◽  
Relative Acidity

FTIR-enabled titration of pyridine with Brønsted acids in aprotic ionic liquids successfully predicts relative acidity and reaction rates.

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