Navigation Links
Polymer Degradation Mechanisms Encountered in Pyrolysis-GC/MS

xtend the application of GC to the analysis of polymers. The high temperatures used in pyrolysis provide volatile fragments and characteristic compounds from the macromolecules, which may be identified by the GC/MS. Understanding the results obtained from unknown polymers is facilitated by a knowledge of how polymers behave at such high temperatures.

The behavior of most synthetic polymers during pyrolysis may be described as one of three general cases. Either the polymer breaks apart into smaller versions of the macromolecule, producing oligomers, unzips all the way to monomer, or eliminates side groups and then fragments. Polyolefins like polyethylene and polypropylene are examples of polymers which produce a large array of oligomeric material, including monomers, dimers and trimers, but also fragments with ten or more monomeric units. Poly methacrylates, such as poly methyl methacrylate, unzip to produce a large peak for the monomer and very little else. Vinyl polymers like PVC and poly vinyl acetate first strip away the side group, making HCl or acetic acid, then produce aromatic compounds from the remaining backbone of the polymer. In all cases, these degradation products are reproducible and characteristic and may be used to identify polymers in an unknown formulation.

References

1. Applied Pyrolysis Handbook, T. P. Wampler (Ed.) Marcel Dekker, New York (1995).

2. E. Ranzi, M. Dente, T. Faravelli, G. Bozzano, S. Fabini, R. Nava, V. Cozzani, L. Tognotti, Kinetic Modeling of Polyethylene and Polypropylene Thermal Degradation, J. Anal. Appl. Pyrolysis, 40-41 (1997) 305-319.

3. Zs. Czgny, E. Jakab, M. Blazs, Thermal Decomposition of Polymer Mixtures Containing Poly (Vinyl Chloride) Macromol. Mater. Eng. 287 (2002) 277-284.


'"/>

Source:


Page: All 1 2 3 4

Related biology technology :

1. Novel PCR Enhancing Factor Improves Performance of Pfu DNA Polymerase
2. Pfu DNA Polymerase as a Hot Start Alternative
3. PCR Performance Comparisons Between pfuturbo and Taq DNA Polymerases
4. pfuturbo DNA Polymerase: A High-Performance, High-Fidelity Enzyme Ideal for PCR Cloning
5. Unique DNA Polymerase Formulation Excels in a Broad Range of PCR Applications
6. Enhanced Amplification of Long Targets with PfuTurbo DNA Polymerase
7. High-Fidelity PCR with a Novel Polymerase Mixture
8. Optimizing pfuturbo DNA Polymerase Amplification Reactions with Perfect Match PCR Enhancer
9. Unique Enhanced DNA Polymerase Delivers High Fidelity and Great PCR Performance
10. The Use of MasterTaq Polymerase for PCR with Humic Material-Contaminated DNA
11. HotStarTaq DNA Polymerase
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Polymer Degradation Mechanisms Encountered Pyrolysis

(Date:5/22/2015)... DUBLIN , May 22, 2015  Actavis plc ... of the U.S. Court of Appeals for the Second ... 2014 preliminary injunction requiring the Company to continue distribution ... Logo - http://photos.prnewswire.com/prnh/20130124/NY47381LOGO   ... uphold this ruling, we intend to continue our strong ...
(Date:5/22/2015)... 2015 According to a new ... 2D Gel Electrophoresis, Agarose & Polyacrylamide Gel, Capillary Electrophoresis, ... Application & by End User - Global Forecast to ... to reach around $1.98 Billion by 2020 with a ... 2020. Browse 226 ma rket ...
(Date:5/22/2015)... 22, 2015 Charm Sciences, Inc. ... of Agriculture (USDA), Grain Inspection, Packers and Stockyards ... to Charm Sciences to monitor aflatoxin in grains ... and ROSA FAST Aflatoxin Quantitative Test (solvent-based). , ... uses Water Extraction Technology to extract aflatoxin ...
(Date:5/22/2015)... (PRWEB) May 22, 2015 Knowledgent ... white paper that explores the potential of big data ... white paper was developed to help life sciences and ... leverage data to gain critical business insights. , The ... amounts of data driven by patient profiling, compliance and ...
Breaking Biology Technology:Actavis Confirms Appeals Court Ruling Requiring Continued Distribution of NAMENDA IR 2Actavis Confirms Appeals Court Ruling Requiring Continued Distribution of NAMENDA IR 3Actavis Confirms Appeals Court Ruling Requiring Continued Distribution of NAMENDA IR 4Actavis Confirms Appeals Court Ruling Requiring Continued Distribution of NAMENDA IR 5Actavis Confirms Appeals Court Ruling Requiring Continued Distribution of NAMENDA IR 6Actavis Confirms Appeals Court Ruling Requiring Continued Distribution of NAMENDA IR 7Actavis Confirms Appeals Court Ruling Requiring Continued Distribution of NAMENDA IR 8Electrophoresis Market Worth $1.98 Billion by 2020 2Electrophoresis Market Worth $1.98 Billion by 2020 3Electrophoresis Market Worth $1.98 Billion by 2020 4USDA-GIPSA (FGIS) Awards 5 Year Contract for Aflatoxin Tests to Charm Sciences 2New White Paper Explores the Potential of Big Data Analytics in Life Sciences and Healthcare 2
... Stevens will host over 100 students and researchers from ... NEMS/MEMS with a focus on Nanomanufacturing. In addition to ... keynote address from Dr. George Hazelrigg, the Deputy Director ... at the US National Science Foundation. The workshop ...
... , July 23 /PRNewswire-Asia-FirstCall/ -- Renhuang,Pharmaceuticals, Inc. (NYSE ... and distributor of botanical products,bio-pharmaceuticals and traditional Chinese medicines ("TCM"), ... by Chinese Academy of,International Trade & Economic Cooperation of Ministry ... , , ...
... MYERS, Fla., July 22 NeoGenomics, Inc. (OTC Bulletin ... quarter 2010 financial results on Thursday, July 29, 2010 . , ... The Company has scheduled a web-cast and conference ... at 11:00 AM EDT .  Interested investors should dial (877) 407-9210 (domestic) ...
Cached Biology Technology:Renhuang Receives AAA(1) Rating from Chinese Academy of International Trade & Economic Cooperation of Ministry of Commerce 2Renhuang Receives AAA(1) Rating from Chinese Academy of International Trade & Economic Cooperation of Ministry of Commerce 3NeoGenomics Schedules its Q2 2010 Earnings Release for July 29, 2010 2NeoGenomics Schedules its Q2 2010 Earnings Release for July 29, 2010 3
(Date:5/22/2015)... Inc. (NASDAQ: NXTD ) ("NXT-ID" or the "Company") announces ... pricing and making the Wocket generally available for $229 via ... of Marketing said, "We,ve extended the opportunity to take advantage ... To get your wocket at this special price, submit your ... June 1, you,ll receive a unique code that gives you ...
(Date:5/22/2015)... DALLAS , May 22, 2015 ... Recognition Market by Solution (2D, 3D, Thermal, Emotion, Forensic), by ... End User (Government and Utilities, Consumer and Home) - ... Market to grow from $2.77 Billion in 2015 to ... Browse 79 market data Tables and ...
(Date:5/21/2015)... -- According to a new market ... Services), by Applications (Surveillance (Airborne, Maritime, Land), Threat ... & Defense & Commercial) - Global Forecast to ... expected to grow from $7252.0 Million in 2015 ... Annual Growth Rate (CAGR) of 6.6%. ...
Breaking Biology News(10 mins):NXT-ID, Inc Announces Retail Price For Wocket Smart Wallet And Extends Discounted Promotional Price Till End Of May 2NXT-ID, Inc Announces Retail Price For Wocket Smart Wallet And Extends Discounted Promotional Price Till End Of May 3Facial Recognition Market Worth $6.19 Billion by 2020 2Facial Recognition Market Worth $6.19 Billion by 2020 3Thermal Imaging Market Worth $9,998.9 Million by 2020 2Thermal Imaging Market Worth $9,998.9 Million by 2020 3Thermal Imaging Market Worth $9,998.9 Million by 2020 4
... CINCINNATIResearchers at the University of Cincinnati (UC) have found ... nervous system, bisphenol A (BPA), could affect a mammal,s ability ... ways that can progress to a potentially fatal infection. ... edition of the Journal of Reproductive Toxicology . ...
... The Canadian Journal of Cardiology has ... fibrillation guidelines. Atrial fibrillation is the most common ... in general, and death. It is, for example, the leading ... seen important changes in the drugs available to treat atrial ...
... SALT LAKE CITY, March 19, 2012Researchers from ... Utah report they have discovered a method to ... translocations quickly, accurately, and inexpensively. A description of ... in this month,s issue of the EMBO Molecular ...
Cached Biology News:BPA could affect reproductive capabilities, cause infection of the uterus 2Beyond the microscope: Identifying specific cancers using molecular analysis 2
Mouse monoclonal antibody raised against a partial recombinant VRK2. NCBI Entrez Gene ID = VRK2...
Mouse polyclonal antibody raised against a partial recombinant DDEF2. NCBI Entrez Gene ID = 8853...
Mouse monoclonal antibody raised against a partial recombinant ALAS2. NCBI Entrez Gene ID = ALAS2...
Mouse polyclonal antibody raised against a partial recombinant QPCT. NCBI Entrez Gene ID = 25797...
Biology Products: