聚丁烯-1导电屏蔽材料的制备及力学性能调控
发布时间：2019-01-27 20:25
【摘要】：聚丁烯-1的耐热、耐应力开裂性能突出,成型加工简单,国内80%以上的聚丁烯-1产品用于管道材料领域,在其它领域的应用较少。目前我国聚丁烯-1产品性能差、利用率较低导致资源浪费严重,因此研究聚丁烯-1改性及应用具有重要的现实意义。为开发聚丁烯-1在导电方面的应用,拓宽使用范围,使用炭黑对其导电性能进行调控。为改善国产聚丁烯-1力学性能,使用碳酸钙对其进行力学调控,提高材料的强度及韧性。硅藻土主要作为助滤剂使用,为开发硅藻土在聚烯烃领域的实用价值,选用聚丁烯-1作为基体制备复合材料并研究其性能,以期拓展硅藻土在不同领域的应用。通过研究炭黑对聚丁烯-1/炭黑复合材料的导电性能及力学性能的影响发现,采用超导炭黑B与高导炭黑VXC68以2：6的质量比配制的复配炭黑体系以8 wt%含量加入到聚丁烯-1中,其复合材料的体积电阻率降至28.5 fl-cm,拉伸强度26.7 MPa,断裂伸长率213.0%,已达常用电缆屏蔽层材料的指标要求。为提高聚丁烯-1的强度及韧性,使用碳酸钙对聚丁烯-1进行力学性能调控。通过未改性碳酸钙与改性碳酸钙填充聚丁烯-1后的力学性能对比发现,铝酸酯偶联剂以1.5 wt%含量改性2#碳酸钙的亲油性最好,当以1Owt%填充聚丁烯-1时复合材料的力学性能最佳,缺口冲击强度比未改性碳酸钙填充时提高了47.2%,比纯聚丁烯-1提高了56.9%,同时复合材料仍保持了聚丁烯-1良好的加工流动性能。为开发硅藻土黑土及白土在聚烯烃领域的应用制备了聚丁烯-1/硅藻土复合材料,通过对比复合材料的力学性能及热稳定性能发现,当硅藻土为30 wt%时,黑土制备复合材料的弯曲模量为1096.8 MPa,较未填充时提高135.6%,对聚丁烯-1的增强效果更好。当硅藻土填充量为15 wt%时,白土制备复合材料的初始热分解温度提高51℃,热稳定性能明显优于黑土制备复合材料。
[Abstract]:Poly (butylene 1) has excellent heat resistance, stress cracking resistance, simple forming and processing. More than 80% of polybutene 1 products are used in pipeline material field, but few in other fields. At present, the poor performance and low utilization ratio of polybutene-1 products in China lead to serious waste of resources, so it is of great practical significance to study the modification and application of polybutene-1. In order to develop the application of polybutene 1 in electric conduction and widen the range of application, carbon black is used to control its electrical conductivity. In order to improve the mechanical properties of polybutene-1 made in China, calcium carbonate was used to improve the strength and toughness of the material. Diatomite is mainly used as filter aid. In order to develop the practical value of diatomite in polyolefin field, polybutene-1 is selected as matrix to prepare composite material and its properties are studied, in order to expand the application of diatomite in different fields. The effects of carbon black on the electrical and mechanical properties of polybutene-1 / carbon black composites were studied. The composite carbon black system prepared by superconducting carbon black B and high conductivity carbon black VXC68 at 2:6 mass ratio was added to polybutene 1 with 8 wt% content. The volume resistivity of the composites decreased to 28.5 fl-cm, tensile strength 26.7 MPa,. The elongation at break of 213.0 has reached the requirements of common cable shielding material. In order to improve the strength and toughness of polybutene 1, the mechanical properties of polybutene 1 were regulated by calcium carbonate. By comparing the mechanical properties of unmodified calcium carbonate and modified calcium carbonate filled with polybutene 1, it was found that the acidophilic property of calcium carbonate modified with 1. 5 wt% of aluminate coupling agent was the best. The mechanical properties of the composites filled with 1Owt% polybutene 1 were the best, the notched impact strength was 47.2% higher than that of unmodified calcium carbonate, and 56.9% higher than that of pure polybutene 1. At the same time, the composites still maintain good processing fluidity of polybutene-1. Polybutene-1 / diatomite composites were prepared in order to develop the application of diatomite black soil and clay in polyolefin field. By comparing the mechanical properties and thermal stability of the composites, it was found that when the diatomite was 30 wt%, The flexural modulus of composite prepared by black soil is 1096.8 MPa, higher than that of unfilled composite, and the reinforcing effect of polybutene 1 is better than that of unfilled composite. When the content of diatomite was 15 wt%, the initial thermal decomposition temperature of the composite was increased by 51 鈩，
本文编号：2416665
[Abstract]:Poly (butylene 1) has excellent heat resistance, stress cracking resistance, simple forming and processing. More than 80% of polybutene 1 products are used in pipeline material field, but few in other fields. At present, the poor performance and low utilization ratio of polybutene-1 products in China lead to serious waste of resources, so it is of great practical significance to study the modification and application of polybutene-1. In order to develop the application of polybutene 1 in electric conduction and widen the range of application, carbon black is used to control its electrical conductivity. In order to improve the mechanical properties of polybutene-1 made in China, calcium carbonate was used to improve the strength and toughness of the material. Diatomite is mainly used as filter aid. In order to develop the practical value of diatomite in polyolefin field, polybutene-1 is selected as matrix to prepare composite material and its properties are studied, in order to expand the application of diatomite in different fields. The effects of carbon black on the electrical and mechanical properties of polybutene-1 / carbon black composites were studied. The composite carbon black system prepared by superconducting carbon black B and high conductivity carbon black VXC68 at 2:6 mass ratio was added to polybutene 1 with 8 wt% content. The volume resistivity of the composites decreased to 28.5 fl-cm, tensile strength 26.7 MPa,. The elongation at break of 213.0 has reached the requirements of common cable shielding material. In order to improve the strength and toughness of polybutene 1, the mechanical properties of polybutene 1 were regulated by calcium carbonate. By comparing the mechanical properties of unmodified calcium carbonate and modified calcium carbonate filled with polybutene 1, it was found that the acidophilic property of calcium carbonate modified with 1. 5 wt% of aluminate coupling agent was the best. The mechanical properties of the composites filled with 1Owt% polybutene 1 were the best, the notched impact strength was 47.2% higher than that of unmodified calcium carbonate, and 56.9% higher than that of pure polybutene 1. At the same time, the composites still maintain good processing fluidity of polybutene-1. Polybutene-1 / diatomite composites were prepared in order to develop the application of diatomite black soil and clay in polyolefin field. By comparing the mechanical properties and thermal stability of the composites, it was found that when the diatomite was 30 wt%, The flexural modulus of composite prepared by black soil is 1096.8 MPa, higher than that of unfilled composite, and the reinforcing effect of polybutene 1 is better than that of unfilled composite. When the content of diatomite was 15 wt%, the initial thermal decomposition temperature of the composite was increased by 51 鈩，
本文编号：2416665
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