Nova Publishers
My Account Nova Publishers Shopping Cart
HomeBooksSeriesJournalsReference CollectionseBooksInformationSalesImprintsFor Authors
            
  Top » Catalog » Books » Chemistry including Chemical Engineering » Encyclopedia of Polymer Composites: Properties, Performance and Applications Chapters » My Account  |  Cart Contents  |  Checkout   
Quick Find
  
Use keywords to find the product you are looking for.
Advanced Search
What's New? more
Novel Systems and Applications in Clean Energy
$82.00
Shopping Cart more
0 items
Information
Shipping & Returns
Privacy Notice
Conditions of Use
Contact Us
Notifications more
NotificationsNotify me of updates to Hindered amine stabilizers as sources of markers of the heterogeneous photooxidation / photostabilization of carbon chain polymers pp.1027-1042
Tell A Friend
 
Tell someone you know about this product.
Hindered amine stabilizers as sources of markers of the heterogeneous photooxidation / photostabilization of carbon chain polymers pp.1027-1042 $100.00
Authors:  (J. Pilař, J. Pospíšil, Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic)
Abstract:
Application of Hindered Amine Stabilizers (HAS) is the state-of-the-art approach to
protection of carbon-chain polymers such as polyolefins and polystyrene or blends
containing these against weathering. During outdoor exposure, the polymers loose their
material properties due to the solar radiation-triggered photooxidation. The complex
mechanism of the stabilization involving cyclic oxidation-triggered transformation of
HAS is outlined. Monitoring of the formation of the HAS-developed key transformation
products responsible within the regenerative mechanism for the effective stabilization,
HAS-related nitroxides, was used to confirm the heterogeneous character of
photooxidation of two carbon-chain polymers, polypropylene and a specific polyethylene
copolymer. Depth profiles of nitroxides were monitored in a long-term photooxidation
regime using Electron Spin Resonance Imaging (ESRI) technique. The shape of
concentration profiles of the nitroxides accumulated in the stationary state upon filtered
Xenon lamp-equipped weatherometer exposure was interpreted in term of the oxygen
diffusion limited oxidation and radiation penetration in oxidation-stressed polymer
surfaces. The data indicate differences in the response of the polymer matrix and of the
used stabilizer system based on secondary HAS and O-alkyl hydroxylamine HAS and/or
HAS combination with UV absorbers. Imaging of nitroxides is a precise tool for marking
heterogeneous oxidation of polyolefins. 


Available Options:
Version:
This Item Is Currently Unavailable.
Special Focus Titles
01.Peter Singer’s Ethics: A Critical Appraisal
02.Sexism: Past, Present and Future Perspectives
03.Body and Politics: Elite Disability Sport in China
04.Childhood and Adolescence: Tribute to Emanuel Chigier, 1928-2017
05.Renal Replacement Therapy: Controversies and Future Trends
06.Food-Drug Interactions: Pharmacokinetics, Prevention and Potential Side Effects
07.Terrorism and Violence in Islamic History and Theological Responses to the Arguments of Terrorists
08.International Event Management: Bridging the Gap between Theory and Practice
09.The Sino-Indian Border War and the Foreign Policies of China and India (1950-1965)
10.Tsunamis: Detection, Risk Assessment and Crisis Management
11.Sediment Watch: Monitoring, Ecological Risk Assessment and Environmental Management
12.Self-Regulated Learners: Strategies, Performance, and Individual Differences

Nova Science Publishers
© Copyright 2004 - 2018

Hindered amine stabilizers as sources of markers of the heterogeneous photooxidation / photostabilization of carbon chain polymers pp.1027-1042