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6965763 
Journal Article 
Study on Volatile Organic Compounds (VOCs) in Polypropylene Monomers and the Effect of Additives on Volatile Organic Compounds in Polypropylene Composites 
Zhang, Di; Sun, G; Zhang, X; , 
2019 
AMER SCIENTIFIC PUBLISHERS 
VALENCIA 
1623-1631 
WOS:000486578900015 
In this paper, the volatile organic compounds of polypropylene raw materials were analyzed under the standard of PV3341 (organic compound emission test standard for non-metallic materials in automobiles) by head-space chromatography-mass spectrometry. It was found that the main volatile organic compounds released from polypropylene monomer were butene, 2-methyl pentane, 2,4-dimethylheptane, C10 similar to C11 alkanes, C12 similar to C13 alkanes. The causes of the occurrence of volatile organic compounds in polypropylene monomer are discussed: 2-methyl pentane, 2,4-dimethylheptane is a free radical transfer of polypropylene in molecules, which is formed by thermal degradation. Butene is formed by the transmission of hydrogen between the molecular chains of polypropylene. At the same time, the effects of different additives on volatile organic compounds in polypropylene composites were studied: the addition of antioxidant 1010 significantly increased the peak area of butene in PP/POE/talc composite system, and exclude the addition of antioxidant 1010 will lead to the production of 2,4-di-tert-butyl phenol in the system. The reason for the appearance of 2,4-di-tert-butyl phenol is the decomposition of antioxidant 168. The volatile organic decamethyl-cyclopentasiloxane in polypropylene composite system is a by-product of HG600R because scratch resistant additive HG600R of is impure. The light stabilizer V9900 reduced the peak area of butene, 4-methyl octane. V9900 addition of 3% compared to the addition of V9900, butene decreased by 30%, 4-methyl octane decreased by 17%. Methylcyclohexane is not the product of thermal decomposition of polypropylene system.