Determination Method of VOCs in Accelerated Aging Polypropylene by Thermal Desorption-Gas Chromatography/Mass Spectrometry

摘要

Polypropylene (PP) is widely used in industry and daily life due to its high productivity and excellent properties. But like other polymers, polypropylene depredates in the atmospheric environment. For example, the wavelengths of sunshine over 290 nm could lead to the degradation and cause discoloration or chalking. Besides of sunshine, there are many factors that would course degradation, such as temperature, humidity, oxidation, and so on. Degradation process of polymers often take years, but researchers found methods to accelerate that process and to evaluate the aging behavior in lab. Accelerated lighting tests are often performed by a xenon lamp because its wavelength is quite similar with sunlight.