Introduction, modification, and characterization of functional groups on the surface of low-density polyethylene film

Rasmussen, James R.; Stedronsky, Erwin R.; Whitesides, George M.

doi:10.1021/ja00456a035

Cited by 186 publications

(115 citation statements)

References 7 publications

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“…Some of the most thorough attempts at the identification of oxidation products in polyethylene by derivatization have been made by Rasmusen et al 2 In their work, the IR peaks from the fluoro-ester formed by reaction with trifluoroacetic anhydride was used to identify alcohol groups in corona treated film. However, we have found that hydroperoxide groups also yield the same esters as do alcohols when oxidized polymer is treated with the fluoro-anhydride.…”

Section: I --C--oh + 2nomentioning

confidence: 99%

Polyolefin oxidation: Quantification of alcohol and hydroperoxide products by nitric oxide reactions

Carlsson

Brousseau

Zhang

et al. 1987

Polymer Degradation and Stability

123

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Section: I --C--oh + 2nomentioning

confidence: 99%

Polyolefin oxidation: Quantification of alcohol and hydroperoxide products by nitric oxide reactions

Carlsson

Brousseau

Zhang

et al. 1987

Polymer Degradation and Stability

123

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“…Noteworthy studies have focused on changes in surface chemical composition and morphology upon etching with strong acids to convert smooth hydrophobic polymer surfaces to rough hydrophilic ones [25][26][27]. However, wet chemical treatments involve a number of additional processing steps, such as washing, rinsing and drying.…”

Section: Introductionmentioning

confidence: 99%

Flame treatment of low-density polyethylene: Surface chemistry across the length scales

Song¹,

Gunst

Arlinghaus

et al. 2007

Applied Surface Science

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The relationship between surface chemistry and morphology of flame treated low-density polyethylene (LDPE) was studied by various characterization techniques across different length scales. The chemical composition of the surface was determined on the micrometer scale by Xray photoelectron spectroscopy (XPS) as well as with time of flight secondary ion mass spectrometry (ToF-SIMS), while surface wettability was obtained through contact angle (CA) measurements on the millimeter scale. The surface concentration of hydroxyl, carbonyl and carboxyl groups, as a function of the ''number'' of the flame treatment passes (which is proportional to the treatment time) was obtained. Moreover, a correlation was found with chemical composition and polarity, emphasizing the role of oxygen-containing functional groups introduced during the treatment. Carboxyl functional groups were specifically identified by fluorescent labeling and the results were compared with the ToF-SIMS data. In addition, atomic force microscopy (AFM) was used to evaluate changes in surface topography and roughness on the nanometer to micrometer length scales. After flame treatment, water-soluble low molecular weight oxidized materials (LMWOM), which were generated as products of oxidation and chain scission of the LDPE surface, agglomerated into small topographical mounds that were visible in the AFM micrographs. After rinsing the flame treated samples with water and ethanol, bead-like nodular surface structures were observed. The ionization state of flame treated LDPE surfaces was monitored by chemical force microscopy (CFM). The effective surface pK a values of carboxylic acid (-COOH) obtained by AFM were revealed by chemical force titration curves and the effective surface pK a values were found to be around 6. #

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“…The Dansyl group was chosen because its fluorescence emission maximum and quantum yield are sensitive to the polarity and acidity of the local environment. The functionalization procedure used introduced 1"6 x 10, 4 Dansyl moieties cm 2 of geometric film surface. The shape of the fluorescence curves and the sirnilarlity of the width of curves of surface-attached dansyl groups to those of soluble -analogs suggests that the majority of the surface-bound species experience a common environment, although certain features of the data suggest a second minority population having a different environment.…”

mentioning

confidence: 99%

Fluorescence properties of dansyl groups covalently bonded to the surface of oxidatively functionalized low-density polyethylene film

Holmes‐Farley¹,

Whitesides²

1986

Langmuir

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The point of zero charge (PZC), the surface acidity constants pK1 and pK2, and the concentration of the charged surface groups A10H2+ and AlO" throughout the pH range 3.0-11.0 were determined by potentiometric acid-base titrations for a series of 7-aluminas used in industry as carriers which contain various amounts of sodium and silicon. Moreover, these surface parameters were determined for a modified carrier prepared by deposition of sodium on the 7-Al203 surface. It was found that the PZC, pKu pK2, and the concentration of the positively charged groups (A10H2+) at very low pH increased with sodium content whereas the concentration of the negative groups (AlO") decreased. The sodium effect was very pronounced when it was selectively concentrated on the surface of 7-Al203 particles. The consequences of the above phenomena are discussed in relation to the use of 7-aluminas for preparation of supported catalysts by deposition of active ion via adsorption of positive or negative species.

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Introduction, modification, and characterization of functional groups on the surface of low-density polyethylene film

Cited by 186 publications

References 7 publications

Polyolefin oxidation: Quantification of alcohol and hydroperoxide products by nitric oxide reactions

Polyolefin oxidation: Quantification of alcohol and hydroperoxide products by nitric oxide reactions

Flame treatment of low-density polyethylene: Surface chemistry across the length scales

Fluorescence properties of dansyl groups covalently bonded to the surface of oxidatively functionalized low-density polyethylene film

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