聚丙烯酸丁酯接枝的纳米SiO_2对聚甲醛的改性  

Nano-silica Grafted with Polybutylacrylate and Its Modification for Polyoxymethylene

作　　者：唐龙祥[1] 刘榛[1] 刘春华[1] 王平华[1] 

机构地区：[1]合肥工业大学化工学院,合肥230009

出　　处：《应用化学》2009年第7期775-779,共5页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金资助项目(50573016);安徽省高等学校青年教师资助计划项目(2006jq1007)

摘　　要：采用原子转移自由基聚合法(ATRP)在纳米SiO2粒子表面接枝聚丙烯酸丁酯(PBA)制备了纳米复合粒子SiO2-g-PBA,并以此对聚甲醛(POM)进行改性。通过红外光谱、热失重分析、透射电子显微镜及扫描电子显微镜等分析技术进行了表征。结果,SiO2-g-PBA在POM中分散均匀,使POM/SiO2-g-PBA复合材料的缺口冲击强度明显高于POM及POM/SiO2复合材料。当SiO2-g-PBA纳米复合粒子的质量分数为2%时,POM/SiO2-g-PBA复合材料的冲击强度达71.2kJ/m2,较纯POM提高了7倍多,同时拉伸强度也有一定的提高,达到68.1MPa。Nano-silica（SiO2） grafted poly（butyl acrylate） （PBA） （SiO2-g-PBA） via surface-initiated atom transfer radical polymerization （ ATRP）, and the modification of polyoxymethylene （ POM ） with SiO2-g-PBA nano composited particles were studied. The results of Fourier transform infrared （FT-IR） spectrometry, transmission electron microscopy（ TEM ）, scanning electron microscopy（ SEM）, and thermogravimetic analysis （TGA） show that SiO2-g-PBA nano composited particles are more easily dispersed in the matrix than bare nano-SiO2. The impact property of POM/SiO2-g-PBA composites is improved. When the mass fraction of SiO2-g-PBA nano composited particles is 2%, the impact strength of the composited materials amounts to 71.2 kJ/m^2, which is 7 times more than that of pure POM. Meantime, the tensile strength can also reach 68. 1 MPa.

关 键 词：ATRP 表面接枝 纳米SIO2 纳米SiO2-g-PBA复合粒子 聚甲醛 力学性能 

分 类 号：O631.2[理学—高分子化学]