A Reversed-Phase High Pressure Liquid Chromatographic Method for Analysis of Additives in Polyolefins

Haney, Max A.; Dark, William A.

doi:10.1093/chromsci/18.12.655

Cited by 55 publications

(21 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Metal stearates are obtained from "commercial" stearic acid or stearine, which is a mixture of palmitic and stearic acid (19). Stearic acid is a naturally occurring saturated organic acid present in the glycerides of animal fats and most vegetable oils, and is derived from palm oil, soybean oil, or edible tallow.…”

Section: Resultsmentioning

confidence: 99%

Effect of metal stearate antacid on the melt stabilization performance of phenolic/phosphite antioxidants in metallocene LLDPE. Part 1: Melt processing stability

Hoàng

Liauw

Allen

et al. 2004

Vinyl Additive Technology

View full text Add to dashboard Cite

The influence of metal stearates on the melt stabilization performance of combinations of phenolic and phosphite antioxidants in a metallocene LLDPE (mLLDPE) has been investigated. This study focused on the effect of both the origin of the stearine blend (i.e., vegetable or animal) used in the formation of the metal stearates and the type of metal stearate (i.e., calcium and zinc stearate). A multiple extrusion experiment was carried out and melt stabilization performance was monitored by melt flow rate (MFR) measurements. The level of consumption of antioxidants was evaluated by HPLC analysis of solvent extracts. Although antagonism was observed with all formulations containing metal stearates, a noticeably greater detrimental effect was apparent with metal stearates based on the vegetable derived stearine blend. Furthermore, it was apparent that the vegetable zinc stearate had a greater detrimental effect than the calcium stearate equivalent. The presence of impurities such as peroxides and metal oxides in the metal stearates investigated was believed to account for the antagonism observed. J. Vinyl Addit. Technol. 10:137–143, 2004. © 2004 Society of Plastics Engineers.

show abstract

Section: Resultsmentioning

confidence: 99%

Effect of metal stearate antacid on the melt stabilization performance of phenolic/phosphite antioxidants in metallocene LLDPE. Part 1: Melt processing stability

Hoàng

Liauw

Allen

et al. 2004

Vinyl Additive Technology

View full text Add to dashboard Cite

show abstract

“…Whilst this method eventually gives good extraction efficiencies, the extraction rate is slow. Times for extraction typically vary from 6 h 18 to 48 h. 19,20 Even with long extraction times recovery is not always good. Perlstein 21 obtained recoveries of only 59% for extraction of Tinuvin 320 from unground PVC after 16 h Soxhlet extraction with diethyl ether.…”

Section: Liquid-solid Extractionsmentioning

confidence: 99%

Critical ReviewAnalytical Extraction of Additives From Polymers

Vandenburg¹,

Clifford²,

Bartle³

et al. 1997

Analyst

142

View full text Add to dashboard Cite

Harold Vandenburg graduated from Manchester Polytechnic where he studied Applied Chemistry parttime whilst working in quality control in the pharmaceutical/personal care sector. After working for a year in Australia and USA, he started six years of research on migration from polymers into foods at high temperatures at the Procter Department of Food Science at the University of Leeds. He obtained his PhD during this time. Still at the University of Leeds, but now at the School of Chemistry, he is undertaking research comparing the effectiveness of sample preparation methods for polymers and environmental samples.

show abstract

“…The use of gas chromatography (GC) is usually limited to low-molecular-weight compounds (l), although high t e m m GC allows the separation of the compounds having molecular weights greater than lo00 daltons (2). Liquid chromatography (LC) is the most widely used method of analysis for these compounds (3)(4)(5). Recently, supercritical fluid chromatography (SFC) with a flame ionization detector has been applied to this analytical problem (6,7).…”

Section: Introductionmentioning

confidence: 99%

“…Comparison of two chromatograms indicated that relative amounts of extracts on the restrictor, ranged from 14% for peak 2 to 11% for peak 3. Relatively large amounts of extracts were deposited on the surface of the restrictor, indicating that their recovery is important.…”

mentioning

confidence: 99%

Supercritical fluid extraction combined with microcolumn liquid chromatography for the analysis of polymer additives

Hirata

Okamoto

1989

J Microcolumn Separations

View full text Add to dashboard Cite

show abstract

A Reversed-Phase High Pressure Liquid Chromatographic Method for Analysis of Additives in Polyolefins

Cited by 55 publications

References 0 publications

Effect of metal stearate antacid on the melt stabilization performance of phenolic/phosphite antioxidants in metallocene LLDPE. Part 1: Melt processing stability

Effect of metal stearate antacid on the melt stabilization performance of phenolic/phosphite antioxidants in metallocene LLDPE. Part 1: Melt processing stability

Critical ReviewAnalytical Extraction of Additives From Polymers

Supercritical fluid extraction combined with microcolumn liquid chromatography for the analysis of polymer additives

Contact Info

Product

Resources

About