【作者】 倪忠斌；

【导师】 陈明清；

【作者基本信息】 江南大学 ， 应用化学， 2004， 硕士

【摘要】 本论文主要进行了两方面的研究：1．利用原位聚合方法对氢氧化镁表面进行了改性，并将改性后的氢氧化镁用来填充聚烯烃，从而制备低烟无卤电缆料；2．研究和制备了ABS／木粉复合材料、探讨了不同增容体系和不同增容方法对复合材料力学性能影响。 1．首先通过原位聚合方法，用表面改性剂对氢氧化镁颗粒进行了表面改性，并探讨了不同表面改性剂种类及用量对氢氧化镁颗粒表面性质的影响。研究结果表明：通过原位聚合，增强了氢氧化镁的疏水亲油性。当ADDP(多磷酸酯)的用量为1wt％时，氢氧化镁的物理性质趋于最佳状态。将改性后的氢氧化镁与聚乙烯共混，发现其拉伸强度明显提高。扫描电镜结果表明，未改性的氢氧化镁与基体树脂之间的空洞比改性后的要大。进而以低密度聚乙烯(LDPE)与乙烯-醋酸乙烯酯共聚物(EVA)为基体材料，表面改性的氢氧化镁为阻燃填料，红磷为阻燃协同剂，有机硅作为加工助剂，通过熔融共混的方法，得到了低烟无卤阻燃电缆料。研究了EVA／LDPE的不同配比、改性后的氢氧化镁及红磷的不同用量对材料力学性能和阻燃性能的影响。结果表明，当EVA／LDPE为3∶1，改性后的氢氧化镁用量为80份(以树脂100份计)，阻燃助剂红磷8份，加工助剂5份时，得到电缆料的物理机械性能和阻燃性能良好，可满足实际生产的需要。 2．为了提高ABS的力学性能，以ABS／木粉为基础体系，加入不同类型的增容剂，制备得到了一系列塑木复合材料，并初步讨论了不同增容体系和增容方法对共混体系力学性能的影响。通过多项性能的比较，结果发现ABS-g-MAH和MAH、St协同增容体系对材料的力学性能有较大提高。本论还研究了PVC用量及木粉含量对ABS木塑材料力学性能的影响。经比较发现ABS／PVc为3：7时共混体系有较高的缺口冲击强度和拉伸强度，经过系列实验发现CPE能有效地提高共混体系的力学性能，因而加入CPE和MBS能进一步提高体系的力学性能。更多还原

【Abstract】 Two aspects of research were studied in this article: 1. The surface of magnesium hydroxide particles was modified by using surface modification agents through in-situ polymerization of styrene, finally Cable jacket compound was prepared by these materials. 2. The mixed material was prepared with wood-power, ABS composites and some add compatilizer.1. The surface of magnesium hydroxide particles were modified by using surface modification agents and the effects on surface characteristic of magnesium hydroxide, applying different sorts and dosage of surface modification agents were discussed. Results indicate the stretching strength of LDPE was obtained enhance when the modified magnesium hydroxide was mixed with ADDP. The physical characteristic of magnesium hydroxide was optimum when the dosage of ADDP reach lwt%. The materials with striking mechanical property and processability were obtained by the composition of the modified magnesium hydroxide and EVA and the result showed that affinity between magnesium hydroxide modified by the in-situ polymerization and EVA was better than non-modified magnesium hydroxide based on the observation of transmission electron microscope. Cable jacket compound is developed on the basis of a lot of experiments and studies of rate between EVA and HDPE, magnesium hydroxide surface treating and dosage, flame retardant agent. The experiments found that the rate of EVA and LDPE is 3:1, the dosage of magnesium hydroxide surface treating is 80 phr , the dosage of flame retardant agent red phosphor is 8 phr and curing aid-agent 5 phr. This kind of compound has good physical mechanical property and excellent flame retardant.2. A series of mixed material were prepared by adding different kinds of compatilizers based on wood-power/ABS composites to improve the physical performance of ABS. Primary research of the influence of vary solubility system and solubility methods on the property of wood-powder/ABS composites were studied. Compared their properties, it is found that ABS-g-MAH and both MAH and St system can improve the properties of Wood-power/ABS mixed material. The effects of PVC content and wood-powder content on the properties of Wood-power/ABS mixed material were studied in this experiment. Compared their properties, it is found that it has better Izod impact strength and tensile strength when the ratio of ABS/PVC content is 3:7, as the ratio of ABS/PVC/ was constant. Then CPE and both CPE and MBS were added into the mixed material as compatibilizers respectively. It was found that CPE can perfectly improve the properties of the mixed material, both CPE and MBS can improve the properties of Wood-power/ABS mixed material.更多还原