【作者】 刘辉；

【导师】 丁会利；

【作者基本信息】 河北工业大学 ， 材料学， 2007， 硕士

【摘要】 本文首先用正交试验法对PP/PA/nano-CaCO3复合材料各种原料的配比做了研究,采用了三因素三水平试验,考察了PA、nano-CaCO3以及作为相容剂的PP-g-MAH的最佳含量,确定了最佳配比的大致范围为:PP/PA/nano-CaCO3 /PP-g-MAH=100/15/15/25。并进一步考察了PA、nano-CaCO3和PP-g-MAH含量对改性聚丙烯的各项性能的影响。研究表明:改性聚丙烯的冲击性能随尼龙和纳米碳酸钙含量的增加呈现先上升后降低的趋势,尼龙和纳米碳酸钙的最佳含量分别为14份和12份;随PP-g-MAH含量的增加冲强度增加,但是弯曲和拉伸强度下降很多,PP-g-MAH的最佳含量为25份。此外,我们以POE-g-MAH代替PP-g-MAH做为相容剂,对新的体系进行了探讨。研究表明:在没有加入纳米碳酸钙时,冲击强度得到大幅度提高,最高达纯PP的890%,但是弯曲和拉伸强度却大幅下降;加入纳米碳酸钙后,冲击强度最高可达纯PP的780%,比不加纳米碳酸钙略有下降,但弯曲和拉伸强度只比纯PP稍有下降,最终确定最佳配方为:PP/PA/nano-CaCO3/ POE-g-MAH=100/14/11/25。研究中,除对体系宏观力学性能进行测试外,还采用红外光谱、核磁共振氢谱、偏光显微镜、示差扫描量热仪DSC、扫描电镜SEM、广角X-射线衍射等分析方法对研究体系进行了系统地表征;研究了体系的结晶行为。研究结果表明:通过对通用塑料聚丙烯(PP)的改性,其综合性能得到了提高,即在其弯曲和拉伸强度基本保持不变或稍有下降时其韧性得到较大的提高,为通用塑料聚丙烯(PP)进一步应用扩大了领域。更多还原

【Abstract】 The orthogonal experiment with three factors at three levels was designed to test the effect of PA, nano-CaCO3 and PP-g-MAH amount on the performance of PP/PA/nano-CaCO3 blend. The optimum proportion is: PP/PA6/ nano-CaCO3/ PP-g-MAH=100/15/15/25.The influence of the content of PA、nano-CaCO3 and PP-g-MAH on the capability of the PP is studied. The result show that the impact strength increases first and then decreases with the increasing of the content of PA and nano-CaCO3. The optimum content of PA and nano-CaCO3 is 14 percent and 12 percent. The impact strength increases with the increasing of PP-g-MAH while the flexural strength and the tensile decrease sharply. The best content of PP-g-MAH is 25 percent.It’s reported that POE can increase the impact strength significantly, so POE-g-MAH is used to replace PP-g-MAH. The result show that the impact strength increases greatly without nano-CaCO3,and the tiptop is 890% of pure PP. But the flexural strength and the tensile strength decrease sharply. The impact strength can reach 780% of pure PP with nano-CaCO3,which is a little lower than that without nano-CaCO3,but the flexural strength and the tensile strength are a little lower than that of pure PP. The best prescription is: PP/PA/nano-CaCO3/POE-g-MAH= 100/14/11/25.In addition to the macroscopic mechanics test, FT-IR, 1H-NMR, PLM, DSC, SEM and WAXD characterization were carried out to study the crystallization behavior. It was found that the overall performance of PP is enhanced, in that the impact intensity gets increased while the flexural and tensile intensity basically kept constant, which extends the further application realm of polypropylene (PP) as general of plastics.更多还原