N-苯基马来酰亚胺的应用与合成

叙述了N -苯基马来酰亚胺的用途及合成方法。通过分析ABS及PVC的市场前景 ,提出了在国内开发N -苯基马来酰亚胺的必要性和紧迫性。     

表面改性技术在白炭黑工业中的应用

文章简述了在白炭黑工业中发展表面改性技术的必要性,并重点综述了表面改性技术的方法、常用改性剂及其改性机理,分析了改性白炭黑的市场应用情况,提出了表面改性技术在白炭黑工业的发展方向。     

大分子界面改性剂对PA6/水镁石力学性能的影响

通过力学性能测试及扫描电子显微镜分析,探讨了自制的大分子界面改性剂对PA6／水镁石力学性能的影响,并与偶联剂TC-114进行了对比。结果表明,加入大分子界面改性剂与偶联剂TC-114相比,可以明显提高PA6／水镁石的力学性能,特别是断裂伸长率和冲击强度提高较大。     

石蜡液体改性剂改性的PO-TPE

聚烯烃热塑性弹性体（PO-TPE）的用途广泛,是工业上较重要的一类热塑性弹性体,主要适用于对柔软度和弹性有较高要求的领域。TPE的低成本和再生性使之成为市场的首选。据估计全球市场为2500kt/a,在未来5年每年的增长率将超过79,6。需求量最大的主要为3类PO-TPE：     

基于DBS改性的硅基DtBuCH18C6吸附剂的制备及其对Sr(Ⅱ)的吸附性能研究

为实现高放废液中核素⁹⁰Sr的分离提取,采用十二烷基苯磺酸(DBS)对4′,4′(5″)-二(叔丁基环己基)-18-冠-6(DtBuCH18C6)进行了改性修饰,合成了新型大孔硅基冠醚吸附剂,并通过SEM、TG-DTA、FT-IR等方法对其进行了表征。结果表明：即使在7 mol/L硝酸环境下,吸附剂中DtBuCH18C6的泄漏量也小于2.03%,有较好的化学稳定性;DBS作为配阴离子促进了DtBuCH18C6与Sr(Ⅱ)的络合,在0.5 mol/L硝酸条件下Sr(Ⅱ)的分配系数提高了约10倍(355.02 cm³/g),且在高酸条件下与硝酸离子呈现协同作用;吸附剂对Sr(Ⅱ)的选择吸附性强,吸附过程符合准二级动力学方程及Langmuir吸附模型,最大饱和吸附容量可达到42.13 mg/g。以1 mol/L硝酸作为洗脱剂,洗脱剂与吸附剂的比例设置为0.90 L/g,接触时间为5 h的条件下,约79%的Sr(Ⅱ)可从吸附剂中洗脱下来,说明吸附剂可重复利用。     

干法改性多孔沥青混合料空隙率计算与修正研究

鉴于现有规范中的空隙率计算方式未合理考虑干法改性剂组分,本文通过对改性沥青混合料理论最大相对密度计算公式的修正,保证了干法改性沥青混合料空隙率的计算更符合实际情况,并以PAC-13为研究对象,通过室内试验探究了修正前后混合料空隙率随干法改性剂的相对密度、掺量的变化趋势,研究表明,干法改性剂相对密度与沥青的相对密度相差越大、干法改性剂掺量越大,修正引起的空隙率变化程度也越大。     

Quantitative analysis on distribution of modifier in microstructure of SBS modified asphalt

A method was developed to make a quantitative analysis of the microstructure of asphalt modified with styrene-butadiene-styrene block(SBS) copolymer. Moreover, both mixed and branched SBS were employed in the preparation of modified asphalt. By sampling specimens from the top, middle, and bottom, a number of microscope slides were made and 400 times micro images were gained. Binarized with the software of MATLAB, the images then went to the process of distribution test, when four typical distributions were employed to investigate the distribution of modifi er spread in asphalt. The distribution characteristic and its parameter were both found. The results show that asphalt phase clearly obeys Poisson distribution, and its parameter, λ, is bond up with the condition SBS performs in. Based on this parameter, indexes can be set up to evaluate the structure of the mixture and its performance as well. Compared with that modifi ed with mixed SBS, the asphalt modifi ed with branched SBS has better performance but worse stability, for it is easier to segregate.