My watch list  

Synergistic effect of hindered amine light stabilizers/ultraviolet absorbers on the polyvinyl chloride/powder nitrile rubber blends during photodegradation


The photostability of hindered amine light stabilizer (HALS) and ultraviolet absorber (UVA) on the blends of plasticized poly (vinyl chloride) (PVC) and powder nitrile rubber (NBR) has been studied with a Xenon Test Chamber. The digital photos, color differences, attenuated total refection‐Fourier transform infrared (ATR‐FTIR) spectra and mechanical properties of the blends have been determined. HALS combined with UVA effectively protects PVC/NBR blends from yellowing and restrains the decrease of elongation at break of the blends. The synergistic phenomenon is ascribed to the different photostable mechanisms of HALS and UVA at different photo aging stages. The color of PVC/NBR control sample quickly changes into yellow at the first 400 h of irradiation, due to the polyenes structures that induced by the double bonds of butadiene in NBR. From 400 to 800 h, crosslinking dominates and the amount of polyenes decreases, resulting into the decrease of color change. At the early stage of irradiation, chain‐scission of polymer takes the predominant place, and the tensile strength decreases. But during the latter stage, crosslinking takes the predominant place and the tensile strength increases slightly. HALS and UVA have a little effect on the maintaining of elongation at break of PVC/NBR blends. POLYM. ENG. SCI., 2013. © 2013 Society of Plastics Engineers

Authors:   R.D. Chai, J. Zhang
Journal:   Polymer Engineering and Science
Year:   2013
Pages:   n/a
DOI:   10.1002/pen.23432
Publication date:   10-01-2013
Facts, background information, dossiers
More about Wiley
  • Publications

    Glycosphingolipids: synthesis and functions

    Abstract Glycosphingolipids (GSLs) are a heterogeneous group of membrane lipids that are formed by a ceramide backbone covalently linked to a glycan moiety. Hundreds of different glycans can be linked to tens of different ceramide molecules, giving rise to an astonishing variety of stru ... more

    Naproxen intercalates and causes photocleavage of DNA through ROS generation

    Abstract Naproxen is an important non steroidal anti‐inflammatory drug (NSAIDs) capable of many pharmacological and biological properties. In this study, we have attempted to ascertain the mode of action and the mechanism of binding of naproxen with DNA. We have also demonstrated that n ... more

    De novo design of functional proteins: Towards artificial hydrogenases

    Abstract Over the last 25 years, de novo design has proven to be a valid approach to generate novel, well‐folded proteins, and most recently, functional proteins. In response to societal needs, this approach is been used increasingly to design functional proteins developed with an eye t ... more

  • News

    Bioengineers Succeed in Producing Plastic Without the use of Fossil Fuels

    A team of pioneering South Korean scientists have succeeded in producing the polymers used for everyday plastics through bioengineering, rather than through the use of fossil fuel based chemicals. This groundbreaking research, which may now allow for the production of environmentally consci ... more

    New look for antiques

    In the past, restoration of paintings and other old artwork often involved application of acrylic resins to consolidate and protect them. One of the most important tasks for modern restorers is thus to remove these layers, because it turns out that acrylic resins not only drastically change ... more

    Is trash the solution to tackling climate change?

    Converting the trash that fills the world's landfills into biofuel may be the answer to both the growing energy crisis and to tackling carbon emissions, claim scientists in Singapore and Switzerland. New research published in Global Change Biology: Bioenergy, reveals how replacing gasoline ... more

Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE