View source for Peel Angle

{{Language_sel|LANG=ger|ARTIKEL=Peelwinkel}}
{{PSM_Infobox}}
<span style="font-size:1.2em;font-weight:bold;">Peel angle</span>
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==Definition of the peel angle==

The peel angle ''&theta;'' is the angle that forms between the two peel arms during the [[Peeling Process|peeling process]] ('''Fig. 1''').

[[File:Peel_Angle_Fig-1.jpg]]
{| 
|- valign="top"
|width="50px"|'''Fig. 1''': 
|width="600px" |Illustration of the [[Fixed-arm Peel Test|fixed-arm peel test]] with the resulting peel angle <math>\theta</math> 
|}

==Dependence of the peel force on the peel angle on the PE-LD/iPB-1 peel system==

The peel angle has a significant influence on the [[Peel Force|peel force]] in the low-density polyethylene peel system blended with isotactic polybutene-1 ([[Plastics – Symbols and Abbreviated Terms|abbreviation]]: PE-LD/iPB-1). '''Figure 2''' shows the peel force determined from the [[Peel Force – Fracture Path Diagram|peel force – elongation (fracture path) diagrams]] as a function of the peel angle for different iPB-1 contents. The peel force shows a clear dependence on the peel angle. It reaches a minimum in the range from 120° to 130° and increases steadily from 130° onwards with larger and smaller peel angles. The dependence of the peel force on the peel angle can be observed. 

[[File:Peel_Angle_Fig-2.jpg]]
{| 
|- valign="top"
|width="50px"|'''Fig. 2''': 
|width="600px" |Influence of the peel angle on the peel force
|}


==See also==

* [[Peel Test|Peel test]]
* [[Peeling Process|Peeling process]]
* [[Peel Properties of Peel Systems|Peel properties of peel systems]]
* [[Peel Force|Peel force]]
* [[Fixed-arm Peel Test|Fixed-arm peel test]]

==References==
* [[Nase, Michael|Nase, M.]], Zankel, A., Langer, B., Baumann, H. J., [[Grellmann,_Wolfgang|Grellmann, W.]], Poelt, P.: Investigation of the Peel Behavior of Polyethylene/Polybutene-1 Peel Films using In-situ Peel Tests with Environmental Scanning Electron Microscopy. Polymer 49 (2008) 5458–5466; [https://doi.org/10.1016/j.polymer.2008.10.004 https://doi.org/10.1016/j.polymer.2008.10.004]
* Nase, M., Langer, B., [https://www.researchgate.net/profile/Wolfgang-Grellmann Grellmann, W.]: Bruchmechanische Kennwertermittlung im T-Peeltest und im Fixed-Arm Peeltest. In: Frenz, H., [https://de.wikipedia.org/wiki/Wolfgang_Grellmann Grellmann, W.] (Eds.): 26. Tagung Werkstoffprüfung „Herausforderung neuer Werkstoffe an die Forschung und Werkstoffprüfung“, Berlin (2008) Proceedings pp. 223–228 (ISBN 978-3-00-026399-6; see [[AMK-Library]] under A 10) [https://www.polymerservice-merseburg.de/fileadmin/inhalte/psm/veroeffentlichungen/Bruchmechanische_Kennwertermittlung_im_T_Peelttest_WP2008.pdf Download as pdf]] 
* Nase, M.: Zusammenhang zwischen Herstellungsbedingungen, übermolekularer Struktur und Eigenschaften von Peelfolien. Shaker Verlag 2010 (ISBN 978-3-8322-9099-3; see [[AMK-Library]] under B 1-17)
* Nase, M., Langer, B., Baumann, H. J., Grellmann, W.: Fracture Mechanics on Polyethylene/Polybutene-1 Peel Films. Polymer Testing 27 (2008) 1017–1025; ; [https://doi.org/10.1016/j.polymertesting.2008.09.002 https://doi.org/10.1016/j.polymertesting.2008.09.002]
* Reincke, K., Grellmann, W.: Verfahren zur Charakterisierung der mechanischen Eigenschaften von Folien und Elastomeren. In: Grellmann, W. (Ed.): Neue Entwicklungen in der Werkstoffprüfung – Herausforderung an die Kennwertermittlung. Tagung "Werkstoffprüfung 2011", Dezember 1 and 2, 2011, Berlin, Proceedings pp. 185–192 (ISBN 978-3-9814516-1-0; see [[AMK-Library]] under A 13)

[[Category:Peel Test]]