苯甲酸钠作为热塑性材料成核剂研究及应用进展  

Research and Application of Sodium Benzoate as Nucleating Agent of Thermoplastic Materials

作　　者：史建公[1,2] 刘志坚[3] 张敏宏[4] 赵桂良[4] 石勤智[3] 杨万泰[2] 赵丽梅[5] 

机构地区：[1]中国石化催化剂分公司博士后工作站,北京102400 [2]北京化工大学材料科学与工程学院,北京100029 [3]中国石化催化剂分公司,北京100011 [4]中国石化催化剂北京燕山分公司,北京102400 [5]中国石化北京燕山分公司树脂应用研究所,北京102500

出　　处：《科技导报》2009年第16期110-115,共6页Science & Technology Review

基　　金：中国石化股份有限公司项目(208058)

摘　　要：热塑性塑料成核剂是一种促进聚合物结晶并改善其晶粒结构的改性剂。在热塑性树脂中加入成核剂可以提高其结晶速度,缩短成型周期,改善制品的机械性能和热性能。热塑性树脂的结晶改性是实现其高性能化、高功能化的重要途径。本研究介绍了苯甲酸钠的合成方法及主要物性。苯甲酸钠作为分散型成核剂,可以提高聚丙烯的结晶温度,缩短结晶时间;在高压下成型,还可以改变聚丙烯的晶型;而作为PET和PEN的成核剂,则是通过与聚酯发生化学反应,通过"化学成核"而起作用。苯甲酸钠成核剂与其他成核剂相比,具有合成工艺简单、成本低、无毒、易储存等优点,本研究还指出,延长苯甲酸钠成核剂产品寿命的方向是提高产品纯度、降低粒度,与其他成核剂复配使用。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.

关 键 词：苯甲酸钠 成核剂 聚丙烯 聚酯 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] TQ314.24