专利：一种玻纤增强无卤阻燃聚碳酸酯复合材料及其制备方法

本发明公开了一种玻纤增强无卤阻燃聚碳酸酯复合材料及其制备方法,按质量百分比计,包括68％～87％的聚碳酸酯,10％～29％的玻璃纤维,0．1％～0．3％的阻燃剂和2．2％～4．0％的助剂。制备时,将聚碳酸酯、玻璃纤维、阻燃剂和助剂混合搅拌3—10min,然后倒人双螺杆挤出机,     

PC基光散射材料的制备研究

将丙烯酸、有机硅光扩散等助剂混合后,经过平行双螺杆挤出机制备了光扩散聚碳酸酯,研究不同配比的丙烯酸和有机硅光扩散剂对聚碳酸酯光学性能的影响。结果表明:采用不同含量的丙烯酸和有机硅光扩散剂复配,添加不同的量可得到不同光学性能的光扩散聚碳酸酯。     

涂料及中间体

阿克苏诺贝尔首款采用巴斯夫纳米助剂面漆问世；Perstorp推聚碳酸酯二元醇用于涂料市场；毕克化学收购美涂料助剂欲扩大北美市场份额。     

多功能复合助剂在HDPE中的应用

针对高密度聚乙烯(HDPE)合成树脂,采用多种国产高效抗氧化稳定剂、热加工稳定剂,同时配以加工润滑剂和分散剂改善助剂分散性及树脂加工性,进行HDPE树脂用多功能复合助剂的研制。实验表明:该多功能复合助剂中各单剂间存在协同效应,不同比例的用量直接影响树脂的抗老化性能。     

阻燃聚碳酸酯耐候性能研究

以阻燃聚碳酸酯材料为研究对象,探讨了不同种类抗冲击改性剂、不同种类阻燃剂、不同种类紫外线吸收剂、不同种类抗水解助剂对阻燃聚碳酸酯材料耐候性能的影响。结果表明:添加以硅橡胶为核的MSiA抗冲击改性剂的阻燃聚碳酸酯材料耐光性能和耐水性能均最好;添加磷腈类阻燃剂SPB-100的阻燃聚碳酸酯材料耐光性能与耐水性能均最好;添加氰基丙烯酸酯类紫外线吸收剂Uvinul 3030的阻燃聚碳酸酯材料耐光性能最好;添加聚合碳化二亚胺抗水解剂Stabaxol P100的阻燃聚碳酸酯材料耐水性能最好。     

塑料市场

我国自主研发新型阻燃剂在新乡化纤应用;杜邦工程塑料深圳基地提高中国聚酰胺塑料产能;20万t PVC项目落户四川雅安;河北元贞开发新型塑料改性助剂;中石化与沙特天津项目可能增上聚碳酸酯;帝人在沪扩产聚碳酸酯混配料;     

碳纤维填充PC的PVT特性

在空气自然冷却条件下,对纯聚碳酸酯和碳纤维填充聚碳酸酯的PVT特性曲线做了对比,结果表明:纤维填充物对聚碳酸酯的PVT特性有明显影响。纤维填充聚碳酸酯的转变温度低于纯聚碳酸酯,通过DSC测试曲线进一步证明了该现象。纤维填充聚碳酸酯的比容对温度的变化更加敏感,在温度高于转变温度时,纤维填充聚碳酸酯的比容变化率大于纯聚碳酸酯。     

国外塑料专利

<正>专利名称:芳香族聚碳酸酯复合材料专利号:EP2390282公开日:2011.11.30本发明涉及的聚碳酸酯复合材料包括:(a)超过85%的芳香族聚碳酸酯;(b)至少0.5%的激光直接成型助剂;(c)至少0.001%的磺酸盐;(d)0~2.4%的橡胶状聚     

分子动力学模拟玻璃态聚碳酸酯对运动变形的分子响应

本文用分子动力学方法对聚碳酸酯非晶结构在运动压缩下的变形进行计算机模拟,通过分析聚碳酸酯在单轴压力下的网络结构,以及分子链二面角分布随压力的变化,获得聚碳酸酯对运动变形的分子响应。研究发现聚合物材料在塑性流引发下膨胀,证明了压力感应活性的出现。     

提高PPS注模性能的添加剂

Colour Tone Masterbatch公司于2005年上半年开发出一种用于聚碳酸酯注射成型的新型助剂MoldWiz INT35UDH．近来英国Genie Kenraw公司将该产品用于聚对苯硫醚（PPS）中发现也取得了较好的效果。添加0％～2％MoldWiz INT-35UDH的聚碳酸酯注射成型产品产量可以提高20％，同时还可以提高进料速率、脱模速率、产品的透明度，降低其加工处理温度（将加工处理温度降低至260～265℃）．这些可喜的研究结果使该公司将这种新产品用于所有的聚碳酸酯塑料中。     

乙烯酮(双乙烯酮)下游产品废水的治理技术

乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。     

A study of miscibility of blends of polybutadienes of varying microstructure

The miscibility of various amorphous polybutadienes with mixed microstructures of 1,4 addition units (cis, 1,4 and trans 1,4) and 1,2 addition units have been investigated. The studies here involved optical transparency, differential scanning calorimetry, and small angle light scattering. It was found that a 90 percent (cis) 1, 4 addition polybutadiene was immiscible with high (91 percent) 1,2 addition polybutadiene. Reduction of the 1,2 content to 71 percent induced an upper critical solution temperature (UCST) with the cis 1,4 polymer. Polybutadienes with 50 percent and 10 percent 1,2 contents were miscible above the crystalline melting temperature of the cis 1,4 polybutadiene. Immiscibility of the 91 percent 1,2 addition polymer was also found with a 10 percent 1,2 polybutadiene. The latter polymer also exhibits an UCST with the 71 percent 1,2 polymer. The results are used to interpret the characteristics of blends of polybutadienes of varying microstructure.     

几种乙炔加压设备性能的比较

阐述并比较了几种加压设备在乙炔加压清净过程中的性能和特点。     

粉煤灰中烧失量检测的不确定度分析

以F类粉煤灰为例,详细介绍了测定粉煤灰中烧失量的步骤、计算数学模型、影响测量不确定度的因素以及各项测量不确定度分量评定,人员、设备、材料、方法、环境都是影响测量不确定的因素。     

生物油的成分分析及物性测定

以添加FeCl2的ZnCl2-KCl混合熔盐裂解纤维素和秸秆,制得生物油。采用傅立叶变换红外光谱法和气相色谱-质谱法分析生物油的成分。结果表明,生物油中成分复杂,含有氧元素、多种有机化合物,主要包括酮类、醛类、酚类及羧酸类等。测定了20～80℃生物油的密度和粘度,发现生物油的密度与温度呈较好线性关系,而生物油的粘度均大于水的粘度,且不同熔盐体系对秸秆生物油的粘度无较大影响。     

Effect of degree of deacetylation of chitosan on the kinetics of ultrasonic degradation of chitosan

The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003     

分解炉扩径的技术改造

我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉     

Process of acceleration of filtration of viscose

Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969.