<div class="csl-bib-body">
<div class="csl-entry">Schnöll, C. (2016). <i>Investigation of various blocked isocyanates for debonding on demand</i> [Diploma Thesis, Technische Universität Wien]. reposiTUm. http://hdl.handle.net/20.500.12708/78487</div>
</div>
-
dc.identifier.uri
http://hdl.handle.net/20.500.12708/78487
-
dc.description
Zsfassung in deutscher Sprache
-
dc.description
Abweichender Titel nach Übersetzung der Verfasserin/des Verfassers
-
dc.description.abstract
Photocurable polymer networks based on mono- and multifunctional methacrylates represent the state-of-the-art technology for dental glues, which are used for temporary dental fixations such as braces, bridges, or crowns. Since those materials exhibit an excellent adhesion to the human tooth surface and moreover good mechanical properties, they are great alternatives to destructive techniques such as the conventional screws or bolts. Furthermore, these dental glues are rather inexpensive and display an esthetically pleasing tooth-like color, which makes them even more competitive towards conventional methods. One of the most important problems that are associated with these types of adhesive cements is their difficult removal after the temporary fixture is no longer needed. At this time, great force has to be applied to remove such restoratives, leading to a rather unpleasant, painful and long treatment for the patient. Therefore, a suitable glue that enables -debonding on demand- (DoD) would be very beneficial and simplify the job for the dentist. The target of this work was to investigate blocked isocyanates (BICs) towards their ability to deliver a suitable DoD concept for dental applications within the proposed temperature range of ~ 60-90 °C. Those thermally labile compounds cleave upon heating and form gas, which then leads to the expansion of the polymer network, thereby weakening the mechanical properties and enabling DoD. Therefore a set of 12 different active methylene compound- or phenol-based BICs was successfully synthesized and analyzed. The debonding temperature Td was determined via CO2 trapping using a Ba(OH)2 solution and the gas formation within a polymer matrix was analyzed using dynamic mechanical thermal analysis (DMTA) and simultaneous thermal analysis (STA). The gas formation within a polymer matrix and therefore the irreversible break up was successfully executed and BICs could be established as a promising concept for DoD.
en
dc.format
VI, 113 Seiten
-
dc.language
English
-
dc.language.iso
en
-
dc.subject
Photopolymers
en
dc.title
Investigation of various blocked isocyanates for debonding on demand
en
dc.title.alternative
Neue Komponenten für Debonding on Demand
de
dc.type
Thesis
en
dc.type
Hochschulschrift
de
dc.contributor.affiliation
TU Wien, Österreich
-
dc.publisher.place
Wien
-
tuw.thesisinformation
Technische Universität Wien
-
dc.contributor.assistant
Gorsche, Christian
-
tuw.publication.orgunit
E163 - Institut für Angewandte Synthesechemie
-
dc.type.qualificationlevel
Diploma
-
dc.identifier.libraryid
AC13060700
-
dc.description.numberOfPages
113
-
dc.thesistype
Diplomarbeit
de
dc.thesistype
Diploma Thesis
en
tuw.advisor.staffStatus
staff
-
tuw.assistant.staffStatus
staff
-
tuw.advisor.orcid
0000-0001-7865-1936
-
item.openairetype
Thesis
-
item.openairetype
Hochschulschrift
-
item.grantfulltext
none
-
item.cerifentitytype
Publications
-
item.cerifentitytype
Publications
-
item.languageiso639-1
en
-
item.openairecristype
http://purl.org/coar/resource_type/c_18cf
-
item.openairecristype
http://purl.org/coar/resource_type/c_18cf
-
item.fulltext
no Fulltext
-
crisitem.author.dept
E163-02-1 - Forschungsgruppe Polymerchemie und Technologie