【作者】 景强；

【导师】 魏无际；

【作者基本信息】 南京工业大学 ， 高分子化学与物理， 2006， 硕士

【摘要】 本文主要研究了块状模塑料(BMC)的各种原料和其模压成型工艺参数对BMC材料力学性能的影响规律,并测定各种原料对BMC的流动性能的影响。结果表明:只有模压成型时达到一定压力,BMC材料才具有较高的力学强度。如果混合时间过长,会损伤玻璃纤维(GF),从而降低BMC的力学强度。GF增强BMC材料时,GF的长度在3mm左右对BMC材料的增强效果最好,太长会影响BMC材料的力学强度;GF含量在BMC材料中有最佳值,GF含量较低时,BMC内部易产生局部缺陷,BMC材料的力学强度较差,但如果GF含量太高,会影响GF/基体树脂的界面,导致BMC的力学强度变差。在BMC模压过程中模压温度和BMC模塑料的组成(GF含量、GF长度、填料粒径和MgO的加入量)均对BMC的初始粘度有不同程度的影响,从而影响基体树脂和GF的共同流动,导致GF在BMC材料中分布的均匀性有所不同,BMC的初始粘度随温度的升高和填料粒径的增加而下降;随GF含量和MgO的加入量的增加以及GF长度的增加而上升。在不加入MgO增稠时,BMC的初始粘度很小,基体树脂难以带动GF共同流动,GF分布很不均匀,BMC的整体流动性能不好,加入MgO对树脂进行增稠后,BMC的初始粘度大大上升,GF分布变得均匀。综合BMC的初始粘度和GF分布的均匀性,当MgO的加入量为的树脂的1.0%wt时,效果达到最好。通过正交实验和单因素对BMC力学性能和流动性能的影响实验,确定实验最优配比为:UPR为30份、GF/填料质量比为30/40、增稠剂的加入量为树脂的1%wt、GF长度为3mm、填料粒径为30目,最佳实验条件为:GF在Z形捏合机中搅拌时间为10min。用偶联剂处理玻纤后,能有效的降低玻纤表面张力,其玻纤表面张力的降低程度与包裹在玻纤表面的偶联剂量有关,玻纤表面张力均随本试验所用三种偶联剂的加入量呈现先降低后增加的趋势。由于KH-570和KH-560的亲有机基团和亲无机基团能分别与UPR和玻纤表面进行化学反应,使得玻纤和UPR之间的界面通过KH-570和KH-560分子这个“桥梁”达到化学键结合,KH-550虽然不能和UPR反应,但它与UPR之间的相容性较好,更多还原

【Abstract】 This paper studied the influence of various stuff of BMC and process parameter of pressure moulding on the mechanical property of BMC and discussed the influence of various stuff of BMC on the flowing property of BMC. The results show that it must have enough press during molding that BMC has better mechanical property. When mixture time becomes longer, it will damnify glass fiber (GF) and then reduced the mechanical property of BMC. The length of GF in BMC should have a moderate scale (3mm), too long will affect the mechanical property of BMC, and moreover, GF content in BMC should have an optical value. If the percent of GF is low, the inside of BMC would have part defect. If it is high, it will affect the interface between GF and polymer matrix, which results in the loss of the mechanical property of BMC. Pressure moulding temperature and the composition (GF content, the length of GF, the particle size of filler and the content of MgO) of BMC have a more or less effect on originality viscosity of BMC and conjunct flow of GF/matrix, then results in the diffence of the distribution of GF in BMC. The originality viscosity of BMC decreases with increasing temperature and the particle size of filler and increases with increasing GF content, the content of MgO and the length of GF. When resin thickens without MgO, the originality viscosity of BMC is low and the matrix is hard to flow together with GF, which is uniform of the distribution of GF, then the fluidity of BMC is bad. But when resin thickens with MgO they are all reversed and the optimal content of MgO is 1.0%wt.Optimal ratio is determined by cross-over experiment. UPR account for 30 shares, the mass ratio of GF/filler is 30/40, the mass percent of MgO/resin is 1.0%wt, the length of GF is 3mm, the particle size of filler is 30 meshes, and the mixing time of GF in Z-kneader is 10 min.The surface tension of GF that is treated by silane coupling agents decreases sharply. The degree of decreasing has something to do with the content of silane coupling agents. The surface tension firstly decreases and then increases with increasing the content of更多还原