论文中文题名: | 酚醛树脂改性煤粉增强填料的力化学法制备研究 |
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学号: | 03287 |
保密级别: | 公开 |
学科代码: | 081902 |
学科名称: | 矿物加工工程 |
学生类型: | 硕士 |
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论文外文题名: | Study on Preparation of A Novel Reinforcing Filler by Modification of Coal Powder with PF Resin using Mechano-chemistry Method |
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论文中文摘要: |
煤结构的特殊性使超细煤粉可部分或全部替代碳黑用作橡胶增容和补强填料。为了提高超细煤粉的补强增容效果,通常用醇胺类有机小分子、各种偶联剂或原位聚合物等对其进行表面改性。线型酚醛树脂(LPF,简称PF)也是某些橡胶常用的增强填料,将LPF作为改性剂对超细煤粉进行改性,制备兼具超细煤粉和LPF补强性能的LPF改性超细煤粉增强填料的研究工作鲜为报导。
本文在行星球磨机上采用力化学方法探讨了LPF改性剂对不同变质程度的(云南褐煤、神府3-1煤和铜川煤)煤超细粉的表面改性的作用,制备了LPF改性煤粉(Coal-g-PF)增强填料,并进一步研究该增强材料对丁腈橡胶(NBR)的增强作用。
首先研究了球料比、球磨时间和改性剂添加量等因素对云南褐煤表面PF接枝率的影响。结果表明,在钢球(Φ16、Φ10、Φ6)配比为3︰2︰1,球磨机转速为300 r/min,PF添加量为4%时,球料比为15︰1,球磨时间为4.5 h时,接枝率较高。在此基础上,进一步研究了PF添加量变化对不同变质程度煤超细粉体PF转化率和接枝率的影响。结果表明:随着PF添加量的增加,超细煤粉PF接枝率呈增大趋势,而PF转化率开始时上升很快,随后随PF添加量的增加趋于平稳;褐煤PF最大转化率为84%,对应PF的添加量和接枝率分别为3%和2.52%,单位接枝率的转化率为19.08;神府煤PF最大转化率为80.6%,对应PF的添加量和接枝率分别为5%和4.03%,单位接枝率的转化率为17.42;铜川煤PF最大转化率为69.8%,对应PF的添加量和接枝率分别为5%和3.49%,单位接枝率的转化率为18.17。用无水乙醇对力化学改性粗产品进行了精制,对精制后的产品进行了FTIR光谱分析。结果表明:经行星球磨处理后煤粉表面与PF发生了化学接枝作用(Coal-g-PF)和氢键包覆作用。Coal-g-PF的粒度分布表明:经行量球磨后超细煤粉发生团聚,粒度分布变宽,Coal-g-PF的粒度分布规律呈现相似规律。热重分析结果表明:5%PF改性神府煤(PF接枝率为4.03%)的热分解温度提高,热稳定性较好。DBP吸收值测定结果表明:当PF的添加量相同时,PF改性褐煤的DBP吸收值最大,PF改性神府煤次之,PF改性铜川煤最小。
为了进一步研究PF改性的超细煤粉对橡胶的增强作用,选择PF添加量分别为5%和8%的改性褐煤和改性神府煤以及PF填加量为10%的改性铜川煤,与NBR进行混炼制备PF改性煤粉增强填充NBR试样,测试了该增强胶料的物理性能和硫化特性。测试结果表明:煤的变质程度对PF改性煤粉增强填充NBR的强度影响很小,拉断伸长率和永久变形均随煤变质程度的升高而减小;与碳黑增强NBR相比,PF改性煤粉填充NBR具有良好的硫化性能,但力学性能明显下降,拉断永久变形较大,拉断伸长率较高,其中5%PF添加量的改性褐煤填充NBR拉断伸长率高达880%;当用PF改性煤粉替代50%碳黑时,增强NBR的综合性能可以满足部分耐油和耐磨橡胶制品的要求。
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论文外文摘要: |
In recent years, with the development of socialist market economy and the thorough of reformation and opening, people pay very close attention to fair and efficiency problem. The 15th and 16th of ccpnc have put forward overall goal and requirement, that is, forming legal system of socialism with Chinese characteristics in 2010. The important way of realizing to run the country according to law is that governments at all levels realize administration according to law conscientiously.
This paper bases on the fair efficiency concept of Deng Xiaoping, and combines fair-efficiency with harmonious society and the administration by law connect together. Writer does further study on the theoretical system of the fair efficiency sight of Deng Xiaoping via revolving around fair-efficiency problem, and analyzes the administrative behavior of government and related legal standard from the layer of law philosophy. In order to explore the solving scheme of above-mentioned problem, writer aims at guarantee and realization of law administration for fair and efficiency in administrative behavior of government from the angle of harmonious society.
“Fair” and “efficiency” are not the concept in a same value position, but they just have conflicting phenomenon in current economic social environment. Deng Xiaoping investigated fair with efficiency in socialist essence and the combination of market economy and socialist society, balanced fair and efficiency through appraising whether the social system is superior. However, harmonious society actually is mature society and fair society. It emphasizes development and strives for efficiency of the society. Fair and justice is the base of harmonious social and “rule by law” is the guarantee of harmonious society. The essential intrinsic requirement of harmonious society is reaching fair with the coordinative unification of efficiency. Therefore government want make administrative freedom in the scope of law and regulations, adjust administrative main part and the administration of relative person. Administrative law may promote the self-construction of administrative organization, and surmount unfair and inefficient case in performing duty, especially in exercising administrative freedom. Standard behavior, coordinate operation and fair, transparent, honest, efficient administration system is the foundation of the government of rule by law.
The innovation of this paper is that writer analyzes fair and efficiency on the foundation of law philosophy, and points out that the essential requirement of harmonious society is fair with the coordinative unification of efficiency. So, after we have completed the goal of the socialist economic development and construction of comfortable standard of living in economic field, we must emphasize " fair first, efficiency considered " and at the same time, combine harmonious society with the general plan of realizing to run the country according to law. Especially, we must pay more attention to society fair and efficiency. Hope it will play the part of certain promote role in “founding harmonious society” and realizing the sustainable development of society.
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中图分类号: | TQ536.1 |
开放日期: | 2008-04-07 |