Properties of adhesives and adhesive materials used in aviation industry

2009 ◽  
Vol 2 (3) ◽  
pp. 147-154 ◽  
Author(s):  
N. F. Lukina ◽  
L. A. Dement’eva ◽  
A. P. Petrova ◽  
T. Yu. Tyumeneva
Keyword(s):  
Aviation Industry ◽  
Materials Used ◽  
Adhesive Materials

scholarly journals Shear Bond Strength of Different Adhesive Materials used for Bonding Orthodontic Brackets : A Comparative in vitro Study

2015 ◽  
Vol 5 (1) ◽  
pp. 22-26
Author(s):  
Muzin Shahi Shaik ◽  
Snigdha Pattanaik ◽  
Sudhakar Pathuri ◽  
Arunachalam Sivakumar
Keyword(s):  
Bond Strength ◽  
Treatment Duration ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Test Group ◽  
In Vitro Study ◽  
Universal Testing ◽  
Materials Used ◽  
Adhesive Materials

Introduction: Bond strength is an important property and determines the amount of force delivered and treatment duration in orthodontics. Many light-cured bonding materials are being used; but it is required to determine the most efficient one withdesired bond strength. Objective: To determine and compare the shear bond strength of three visible light-cured composites (Transbond XT, Heliositand Enlight) and two self-cured composites (Rely-a-bond and Concise). Materials & Method: 100 extracted premolars were collected and randomly divided into 5 test groups of different adhesives. Brackets were bonded to the teeth in each test group with the respective adhesive according to the manufacturer’s instructions. Each specimen was debonded using Universal Testing Machine and the shear bond strength for each specimen was calculated. All the groups were compared by ANOVA one-way test. Results: There were statistically significant differences among the five groups (P<0.05). The shear bond strength of Enlight (13.92 ± 3.92) is similar to Transbond XT (14.30 ± 4.35). Conclusion: Light cure composites showed higher bond strength than self cure composites.

Properties of adhesive materials used in repair-and-renewal operations

2009 ◽  
Vol 2 (1) ◽  
pp. 34-43 ◽  
Author(s):  
A. P. Petrova ◽  
V. V. Kulikov
Keyword(s):  
Materials Used ◽  
Adhesive Materials

Flying smart: Smart materials used in aviation industry

2020 ◽  
Vol 27 ◽  
pp. 244-250 ◽  
Author(s):  
Keshav Sharma ◽  
G. Srinivas
Keyword(s):  
Smart Materials ◽  
Aviation Industry ◽  
Materials Used

The Effect of Resin-modified Glass-ionomer Cement Base and Bulk-fill Resin Composite on Cuspal Deformation

2016 ◽  
Vol 41 (2) ◽  
pp. 208-218 ◽  
Author(s):  
KV Nguyen ◽  
RH Wong ◽  
J Palamara ◽  
MF Burrow
Keyword(s):  
Resin Composite ◽  
Glass Ionomer Cement ◽  
High Viscosity ◽  
Glass Ionomer ◽  
Base Materials ◽  
Resin Modified Glass Ionomer ◽  
Maxillary Premolars ◽  
Materials Used ◽  
Ionomer Cement ◽  
Adhesive Materials

SUMMARY Objectives: This study investigated cuspal deformation in teeth restored with different types of adhesive materials with and without a base. Methods: Mesio-occluso-distal slot cavities of moderately large dimension were prepared on extracted maxillary premolars (n=24). Teeth were assigned to one of four groups and restored with either a sonic-activated bulk-fill resin composite (RC) (SonicFill), or a conventional nanohybrid RC (Herculite Ultra). The base materials used were a flowable nanofilled RC (Premise Flowable) and a high-viscosity resin-modified glass-ionomer cement (RMGIC) (Riva Light-Cure HV). Cuspal deflection was measured with two direct current differential transformers, each contacting a buccal and palatal cusp. Cuspal movements were recorded during and after restoration placement. Data for the buccal and palatal cusp deflections were combined to give the net cuspal deflection. Results: Data varied widely. All teeth experienced net inward cuspal movement. No statistically significant differences in cuspal deflection were found among the four test groups. Conclusions: The use of a flowable RC or an RMGIC in closed-laminate restorations produced the same degree of cuspal movement as restorations filled with only a conventional nanohybrid or bulk-fill RC.

scholarly journals Study of form-stable features of transforming parts of youth kit

2021 ◽  
pp. 86-90
Author(s):  
K. Zh. Kucharbaeva ◽  
A. S. Razbekova
Keyword(s):  
Quality Indicators ◽  
Dimensional Stability ◽  
Processing Methods ◽  
Materials Used ◽  
Adhesive Materials

The article examines the quality indicators of adhesive materials that form the dimensional stability of the transformed parts, and substantiates the processing methods. As a result, the order of gluing the parts and the order of gluing the adhesive materials used in the manufacture of transformable sets were determined.

scholarly journals Unconventional Methods of Non-Destructive Tests. Part 3.

2021 ◽  
pp. 61-65
Author(s):  
Łukasz Rawicki
Keyword(s):  
Structural Materials ◽  
Aviation Industry ◽  
Testing Methods ◽  
Materials Used ◽  
Non Destructive ◽  
Unconventional Methods ◽  
Manufacturing Stage ◽  
Destructive Methods

The article presents some testing methods applicable in the aviation industry. In addition to popular non-destructive methods, NDT methods used in the aviation industry (and discussed in the article) include optical holography or shearography. Structural materials used in the aviation industry as well as the importance of analyses, both at the manufacturing stage and during operation, require the performance of regular tests as a negligent approach to such activities could end up in a catastrophe.

METHODS OF TESTING RING SAMPLES MADE OF PLASTIC COMPOSITE MATERIALS USED IN THE AVIATION INDUSTRY AND THE ESTIMATED EVALUATION OF THEIR EFFECTIVENESS

2019 ◽  
Vol 6 (4) ◽  
pp. 68-71
Author(s):  
Mikhail Mikhailovich Polovin ◽  
Egor Vadimovich Nazarov ◽  
Evgeniy Vasilyevich Zhuravlev ◽  
Denis Sergeevich Shavelkin
Keyword(s):  
Mechanical Properties ◽  
Comparative Analysis ◽  
Composite Materials ◽  
Aviation Industry ◽  
Advantages And Disadvantages ◽  
Plastic Composite ◽  
Materials Used ◽  
Definition Of ◽  
The Given

In relation to the increase in the proportion of composite materials used in the design of modern aircraft, the most acute issue is the issue of confirming the characteristics of materials during their testing. In this paper, the methods of testing composite materials used in the elements of the glider design are analyzed, and the estimated assessment of the methods analyzed is made.Within the limits of the given work the comparative analysis of existing and perspective methods of carrying out of tests of ring samples from composite materials for the purpose of an estimation of their efficiency regarding definition of mechanical properties is carried out. The advantages and disadvantages of each method are determined.

scholarly journals Micro-Pillar Integrated Dissolving Microneedles for Enhanced Transdermal Drug Delivery

Pharmaceutics ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 402 ◽  
Author(s):  
Seunghee Lee ◽  
Shayan Fakhraei Lahiji ◽  
Jeesu Jang ◽  
Mingyu Jang ◽  
Hyungil Jung
Keyword(s):  
Drug Delivery ◽  
Transdermal Delivery ◽  
Transdermal Drug Delivery ◽  
Skin Irritation ◽  
Skin Penetration ◽  
Therapeutic Drugs ◽  
Dissolving Microneedles ◽  
Materials Used ◽  
Micro Pillars ◽  
Adhesive Materials

The dissolving microneedle (DMN) patch is a transdermal delivery system, containing arrays of micro-sized polymeric needles capable of encapsulating therapeutic drugs within their matrix and releasing them into the skin. However, the elastic properties of the skin prevent DMNs from complete insertion and accurate delivery of encapsulated compounds into the skin. Moreover, the adhesive materials used in patches may cause skin irritation, inflammation, and redness. Therefore, we developed a patchless, micro-pillar integrated DMN (P-DMN) that is simple to fabricate and enhances transdermal drug delivery compared with traditional DMN patches. The micro-pillars were made of polymethyl methacrylate at a height of 300 μm and a base diameter of 500 μm. To fabricate P-DMNs, we employed hyaluronic acid, which is a widely used derma filler and plays a role in tissue re-epithelialization. We demonstrate that utilizing P-DMNs significantly improves the delivery efficiency of an encapsulated drug surrogate (91.83% ± 7.75%) compared with traditional DMNs (64.86% ± 8.17%). Interestingly, P-DMNs remarkably increase the skin penetration accuracy rate of encapsulated drugs, up to 97.78% ± 2.22%, compared with 44.44% ± 7.85% in traditional DMNs. Our findings suggest that P-DMNs could serve as a highly accurate and efficient platform for transdermal delivery of various types of micro- and macro-biomolecules.

scholarly journals Chemical Composition and Micro Morphology of Golden Laminae in the Wall Painting “La Maestà” by Simone Martini: A Study by Optical Microscopy, XRD, FESEM-EDS and ToF-SIMS

2019 ◽  
Vol 9 (17) ◽  
pp. 3452 ◽  
Author(s):  
Andrea Atrei ◽  
Andrea Scala ◽  
Marco Giamello ◽  
Marianna Uva ◽  
Riccardo Maria Pulselli ◽  
...  
Keyword(s):  
Secondary Ion Mass Spectrometry ◽  
Chemical Characterization ◽  
High Sensitivity ◽  
Wall Painting ◽  
Tof Sims ◽  
Materials Used ◽  
Micro Morphology ◽  
Secondary Ion ◽  
Adhesive Materials

The chemical characterization of gilding decorations in works of art is fundamental in order to elucidate the techniques and materials used by the artists. In the present work we investigated by a combination of bulk and surface sensitive methods the composition and micro stratigraphy of the gilding laminae in the wall painting of the 14th century “La Maestà”, the masterpiece of Simone Martini. The aim of this study was to determine the composition of the gilding leaves and of the adhesive organic materials used to glue the metallic decorations to the wall painting. Due to the altered state of the samples we could not univocally identify the nature of the adhesive materials. Time of flight secondary ion mass spectrometry measurements showed that the gilding layers consisted of a gold leaf which was laid either directly on a preparation layer or on a tin lamina. The high sensitivity of ToF-SIMS and its spatial resolution allowed us to find traces of silver in the gold leaves and in the tin laminae which were not revealed by energy dispersive X-ray analysis.

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