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Molecular interactions and adhesion.

Oldak, Robert Krzysztof.

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Molecular interactions and adhesion.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Molecular interactions and adhesion./
作者:	Oldak, Robert Krzysztof.
面頁冊數:	182 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-09, Section: B, page: 4839.
Contained By:	Dissertation Abstracts International66-09B.
標題:	Chemistry, Polymer. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3188503
ISBN:	9780542318764

Molecular interactions and adhesion.
Oldak, Robert Krzysztof.

Molecular interactions and adhesion. - 182 p.

Source: Dissertation Abstracts International, Volume: 66-09, Section: B, page: 4839.

Thesis (Ph.D.)--Lehigh University, 2005.

Intermolecular acid-base interactions are important factors in promoting adhesion. What differentiates this work from other studies of acid-base interactions and adhesion that exist in the open literature is a unique combination of infrared spectroscopy and Flow Microcalorimetry (FMC) applied to identify and quantify molecular interactions. Acid-basic interactions are often used to explain adhesion. However, most of the acid-base theories fail to be self consistent and do not deliver accurate quantitative predictions of adhesion strength. The acid-base concept proposed by Drago and promoted by Fowkes appears to be most accurate despite its pitfalls.

ISBN: 9780542318764Subjects--Topical Terms:

1018428
Chemistry, Polymer.

Molecular interactions and adhesion.
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245 1 0 $a Molecular interactions and adhesion.
300 $a 182 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-09, Section: B, page: 4839.
500 $a Adviser: Raymond A. Pearson.
502 $a Thesis (Ph.D.)--Lehigh University, 2005.
520 $a Intermolecular acid-base interactions are important factors in promoting adhesion. What differentiates this work from other studies of acid-base interactions and adhesion that exist in the open literature is a unique combination of infrared spectroscopy and Flow Microcalorimetry (FMC) applied to identify and quantify molecular interactions. Acid-basic interactions are often used to explain adhesion. However, most of the acid-base theories fail to be self consistent and do not deliver accurate quantitative predictions of adhesion strength. The acid-base concept proposed by Drago and promoted by Fowkes appears to be most accurate despite its pitfalls.
520 $a In this study direct measurements of the heat of interaction by FMC and hydroxyl peak shifts in FTIR spectra are used to identify and determine interactions between epoxy resins and PI2555 polyimide. Hydroxyl peak shifts in FTIR spectra can be used to obtain Drago constants. The constants have been determined using a least squares fit method and hardness of structural homologues. The Drago constants for control molecules obtained in the same way agree with literature data. The knowledge of the magnitude of Drago acid-base parameters can lead to quantification of the basic character of epoxy resins, curatives, and even a simple imide.
520 $a The basic molecules interacted well with polyimide. The curing agents were found (from FTIR and FMC) to be more basic than epoxy resins and their basicity was found to directly correlate with adhesion strength on epoxy/polyimide interface.
520 $a Adsorption of basic epoxy resins and curing agents on a polyimide surface is only possible in the presence of acidic sites on the surface. Interestingly, from FMC and FTIR study no acidic character in the model imide was found. Both acidic and basic sites were detected on the PI2555 polyimide surface from the FMC results. The contradictory results between model imide and polyimide can be explained by oxidation of the polyimide surface. Interestingly, the FMC adsorption data of commercial and model adhesive systems onto PI2555 polyimide surface correlated well with adhesive strength measurements, therefore confirming the hypothesis that molecular interactions are crucial for adhesion. Further studies are recommended and precipitated polyimide powders may be useful.
590 $a School code: 0105.
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650 4 $a Chemistry, Physical. $3 560527
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773 0 $t Dissertation Abstracts International $g 66-09B.
790 1 0 $a Pearson, Raymond A., $e advisor
790 $a 0105
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3188503