Discoloration of transparent adhesives for building applications due to aging under solar exposure
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
Sunlight is essential for life on earth. Many biological processes are influenced by the light of the sun and humans
also react sensitively to it. Therefore, this light and its incidence have a decisive influence on the comfort inside
buildings. Hence, glass, as a transparent building material, is an elementary design element in modern architecture.
To support the clear appearance, transparent adhesives represent an attractive alternative to opaque
adhesives as well as to opaque structural sealants. But solar radiation affects such adhesives or sealants negatively
through the absorption of UV-light that leads to unfavorable changes in material properties and has a
significant effect on their durability. To estimate the service life of structural adhesive joints in glass constructions
a large number of accelerated aging processes are carried out on a laboratory scale. In the case of UV aging,
the accelerating effect is mainly achieved by continuously irradiating the samples. The radiation flux is mostly
constant what only partially represent real solar radiation effects. A precise knowledge of the real light impact on
the building envelope is needed to be able to evaluate the received material stresses after artificial aging
correctly.
In this study, transparent adhesives are conducted to standardized, time-shortened sunlight aging methods
followed by the examination of the effects via spectroscopic and chemical analysis. These results are evaluated
with regard to real amounts of radiation occurring on a building. Corresponding data are used from a simulation
of the solar radiation exposure depending on season and weather influences as well as on the location and
orientation of the building. The aim is to identify zones with such high radiation amounts which cause damage of
the adhesives and to investigate and recommend constructive protective measures.
also react sensitively to it. Therefore, this light and its incidence have a decisive influence on the comfort inside
buildings. Hence, glass, as a transparent building material, is an elementary design element in modern architecture.
To support the clear appearance, transparent adhesives represent an attractive alternative to opaque
adhesives as well as to opaque structural sealants. But solar radiation affects such adhesives or sealants negatively
through the absorption of UV-light that leads to unfavorable changes in material properties and has a
significant effect on their durability. To estimate the service life of structural adhesive joints in glass constructions
a large number of accelerated aging processes are carried out on a laboratory scale. In the case of UV aging,
the accelerating effect is mainly achieved by continuously irradiating the samples. The radiation flux is mostly
constant what only partially represent real solar radiation effects. A precise knowledge of the real light impact on
the building envelope is needed to be able to evaluate the received material stresses after artificial aging
correctly.
In this study, transparent adhesives are conducted to standardized, time-shortened sunlight aging methods
followed by the examination of the effects via spectroscopic and chemical analysis. These results are evaluated
with regard to real amounts of radiation occurring on a building. Corresponding data are used from a simulation
of the solar radiation exposure depending on season and weather influences as well as on the location and
orientation of the building. The aim is to identify zones with such high radiation amounts which cause damage of
the adhesives and to investigate and recommend constructive protective measures.
Details
Originalsprache | Englisch |
---|---|
Aufsatznummer | 103137 |
Seiten (von - bis) | 103-137 |
Fachzeitschrift | International journal of adhesion and adhesives |
Jahrgang | 116 |
Publikationsstatus | Veröffentlicht - Juli 2022 |
Peer-Review-Status | Ja |
Externe IDs
Scopus | 85127472188 |
---|---|
WOS | 000793710300005 |
Mendeley | 8ef6e5f6-438f-39b0-abbf-48c7bff49b67 |
Schlagworte
Forschungsprofillinien der TU Dresden
DFG-Fachsystematik nach Fachkollegium
Fächergruppen, Lehr- und Forschungsbereiche, Fachgebiete nach Destatis
Ziele für nachhaltige Entwicklung
ASJC Scopus Sachgebiete
Schlagwörter
- Transparent adhesive, Aging, UV radiation, Accelerated weathering, Transmission, FTIR, Accelerated weathering, Aging, FTIR, Transmission, Transparent adhesive, UV radiation, Ftir