« Back
TGA/IST16/GC/MS coupling : an advanced technique for LLDPE structure interpretation
Poster Title: TGA/IST16/GC/MS coupling : an advanced technique for LLDPE structure interpretation
Submitted on 30 Mar 2015
Author(s): Tiffany Marre1 ; Axel Bart1 ; Alain Delauzun1 ; Xavier Cardot1 ; Ronan Cozic1 ; Olivier Boyron2 ; Christophe Boisson2
Affiliations: 1 SRA Instruments, 210 rue des Sources 69280 Marcy l'Etoile, France - 2 Université de Lyon, Univ. Lyon 1, CPE Lyon, CNRS UMR 5265, Laboratoire de Chimie Catalyse Polymères et Procédés (C2P2), Equipe LCPP, Bat 308F, 43 Bd du 11 Novembre 1918, 69616 Villeurbanne, France
This poster was presented at Pittcon'15
Poster Views: 3,090
View poster »

Poster Information
Abstract: The polyethylenes (LDPE, LLDPE, HDPE) are the most industrially produced synthetic polymers in volume with a production of around 75 MT a year. The LLDPE which is produced by coordination catalysis is a copolymer of ethylene with a alpha-olefin (typically hexene or octene).1,2 One of its main advantage is that its structure and consequently its properties are easily adjustable by variation of the co-monomer content (short chain branching). It is thus of high interest to determine the structure of LLDPE.
A range of crystalline copolymers of ethylene with alpha-olefins (propene, hexene, octene, octadecene and norbornene) were prepared using the complexes Et(Ind)2ZrCl2 and (nBuCp)2ZrCl2 activated with MAO. The average composition of the copolymers was measured using 1H, 13C NMR and TREF. The samples were characterized by coupling of the TGA with the GC-MS technique to get information about the structure of LLDPE.
For a clearer understanding of certain reactions, the TGA technique is often coupled to mass spectrometry (MS) and infrared spectroscopy (IR) for identifying the gaseous compounds emitted during thermal decomposition of the sample. When it comes to complex materials such as LLDPE, then gas mixtures are produced but the majority of components cannot be identified precisely with MS or IR. In this case, coupling of the TGA with the GC-MS technique offers interesting advantages. The emitted compounds are first separated by gas chromatography (GC) then identified and quantified by MS. An innovative TGA/IST16/GC/MS coupling is presented that significantly increase the number of data collected and thus provides an efficient way to take advantage of the GC/MS technique. The configuration uses a fractions collector inserted between the TGA and the GC.3
This coupling is a powerful and versatile tool for interpretation of structure of LLDPE. An example with characterization of several polyethylene samples will illustrate this.
Summary: An innovative TGA/IST16/GC/MS coupling is presented.References: 1 R. Mulhaupt, Macromol. Chem. Phys. 2003, 204, 289.
2 M. P. McDaniel, Adv. Catal. 2010, 53, 123.
3 J.M. Letoffe et al., Journal of Thermal Analysis and Calorimetry. 76, 491-505 (2004)
Report abuse »
Ask the author a question about this poster.
Ask a Question »

Creative Commons

Related Posters

R-PE and APC Conjugated Recombinant Proteins
Creative BioMart

Active lifestyle and cognitive performance in older adults
Hana Georgi, Zuzana Frydrychová

Improving the Chemical Synthesis and Performance of Extended-Length Guide RNAs for Genome Editing and Control of Gene Expression
Laurakay Bruhn, Bo Curry, Rob Kaiser, Ben Lunstad, Ryan McCaffrey, Joel Myerson, Subhadeep Roy, Daniel Ryan, Israel Steinfeld, David Taussig, Justin Townsend, Suhani Thakker, Doug Dellinger

Modulating the Activity of CRISPR-Cas with Chemical Modifications in Single-Guide RNAs
Daniel Ryan, David Taussig, Suhani Thakker, Israel Steinfeld, Ben Lunstad, Rob Kaiser, Ryan McCaffrey, Justin Townsend, Patrick Chaffey, Bo Curry, Doug Dellinger, Laurakay Bruhn

Cloning, expression and purification of small subunit of Exodeoxyribonuclease VII from Vancomycin Resistant Staphylococcus aureus (VRSA).
Faryal Ashraf, Atia-tul-Wahab, M. Iqbal Choudhary