稀土偶联剂对氢氧化镁的表面改性及其阻燃应用.pdf

塑料工业
第39卷第6期
CHINA PLASTICS INDUSTRY
2011年6月
稀土偶联剂对氢氧化镁的表面改性及其阻燃应用
滕谋勇,徐保良2,秦明臣3,王艳芳2,张星,邓爱霞
(1.聊城大学材料科学与工程学院,山东聊城252059;2.山东阳谷电缆集团有限公司,山东聊城252311;
3.广东炜林纳功能材料有限公司,广东佛山528521)
摘要:采用稀土偶联剂、硅烷傌联剂及钛酸酯偶联剂对氢氧化镁进行表面改性,考察了偶联剂用量、处理温度、
时间对氢氧化镁表面改性效果的影响。通过黏度、表面活化度等指标对改性效果进行了表征。结果表明:稀土偶联剂
对氢氧化镁的改性效果较其他二者要好,并确定了稀土偶联剂的改性的最佳工艺条件。采用改性后的氢氧化镁进行了
填充聚乙烯研究,结果表明:当稀土改性后的氢氧化镁的填充量为140份时,复合材料的阻燃性达到了UI94V0标
准,力学性能较好;通过SEM观察表明:稀土改性后的氢氧化镁在 LLDPE基体树脂中的分散性明显优于未政性的。
关键词:氢氧化镁;稀士;钛酸酯;硅烷;表面改性;偶联剂
中图分类号:TQ314.24'8文献标识码:B文章编号:1005-5770(2011)06-0082-05
Surface Modification of Mg(OH)2 Using Rare Earth Coupling Agent
and Flame Retardant Efifect
TENG Mou"yong XU Bao-liang WANG Yan-fang ,ZHANG Xing, DENG Ai-xia
(1. Department of Malerial Science and Engineering, Liaocheng University, Liaocheng 252059, China
2. Shangdong Yanggu cables Group Co, Ltd, Liao cheng 253111, China
3. Guangdong Wei Carolina Functional Materials Co, Ltd, foshan 528521, China
Abstract: The magnesium hydroxide powder was modified by rare earth coupling agent, silane cou
agent and titanate coupling agent in this paper. The effects of amount, temperature and time on the surface
modification were studied; the properties of magnesium hydroxide were studied by viscosity experiments and
activation ne est. The results showed that rare earth coupling agent had good coupling effect comparing to
titanate and silane. The optimum conditions of rare-earth modified magnesium hydroxide by means of dr
method were studied. The modified magnesium hydroxide was filled in LLDPE. The mechanical and flame re
tardancy of compounds were studied. The results showed that when the amount of magnesium hydroxide modi
fied by rare earth up to 140 phr, the flame retardancy of compound reached V-0 grade and the compound had
better mechanical properties. The results of SEM showed the dispersibility of the surface treated particles wa
better than that of particles which were not treated in LLDPE
Keywords Mgcohz; Rare Earth; Titanate; Silane Surface Modification; Coupling Agent
无机阻燃剂氢氧化镁[Mg(OH)2]具有热稳定性化学作用把二者结合,或者通过化学反应,在其表面
好、不挥发、不析出、不产生有毒气体、不腐蚀加工设产生一层有机物,从而使其与聚合物的相容性提高。
备、消烟作用明显、价格便宜等优点。由于其分解温度常用的偶联剂或表面活性剂主要有高级脂肪酸及其
高且消烟性好,在聚烯烃的阻燃化中具有重要地位。盐、不饱和有机酸和有机硅等。其中偶联剂主要包
但为了改变它天然的“亲水疏油”表面性质,提高其与括:硅烷类、钛酸酯类、铝酸酯类、硼酸酯类、磷酸
聚合物的相容性,降低对聚合物产品加工性能以及力学酯类和锆铝酸酯类等],生产工艺和应用技术已经
性能的影响,必须对其进行表面处理2。
比较成熟。20世纪90年代以来,国内一些科研机构
对无机粉体表面进行改性,常用的方法是利用偶与企业利用国内丰富的稀土资源,开展了具有自主知
联剂或表面活性剂与无机粉体表面通过物理和(或)识产权的稀土偶联剂研究工作,目前已有部分产品工
作者简介:滕谋勇,男,1966年出生,教授,主要从事聚合物改性及加工,已发表文章20余篇。
0810180102@lcu,edu,cn