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《Science & Technology Review》 2009-16
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Research and Application of Sodium Benzoate as Nucleating Agent of Thermoplastic Materials

SHI Jiangong1,2, LIU Zhijian3, ZHANG Minhong4, ZHAO Guiliang4, SHI Qinzhi3, YANG Wantai2, ZHAO Limei5 1.Post-doctoral Research Station of Sinopec Catalyst Company, Beijing 102400, China 2.College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China 3.Sinopec Catalyst Company, Beijing 100011, China 4.Beijing Yanshan Catalyst Company, Sinopec Catalyst Company, Beijing 102400, China 5.Resin Application Research Institute, Sinopec Beijing Yanshan Petrochemical Co., Ltd., Beijing 102500, China  
The terms "nucleators", "nucleator compound(s)", "nucleating agent", "nucleating agents" generally mean any additive to polymer, individually or in a combination, that produces nucleation sites for polymer crystals in the transition from its molten state to a solid, cooled structure.Any compound that exhibits such a beneficial effect and property is included within this definition.Such nucleator compounds more specially include dibenzylidene sorbitol types, substituted aromatic phosphate, dehydroabietate-based nucleators and the like.Aromatic carboxylic acids and their metal salts, such as sodium benzoate, are an important type of nucleators.This paper reviews the research and application of sodium benzoate as nucleating agent of thermoplastic materials.Sodium benzoate is made by the neutralization reaction of benzoic acid with sodium bicarbonate solution, and as a dispersion type nucleating agent, it can increase the crystallization temperature of polypropylene(PP) and shorten the crystallization time of PP, and also can change the crystalline form of PP under high-pressure crystallization.When sodium benzoate is used in PET and PEN as a nucleating agent, it plays its role by reacting with polyester(e.g.PET or PEN).It is shown that the improving routes of sodium benzoate nucleating agent are as follows:increasing its purity, reducing its particle size and combining actions with other nucleating agents.
【Fund】: 中国石化股份有限公司项目(208058)
【CateGory Index】: TQ325.14
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