共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
通过TG、DSC、高精度测色仪及SEM测试分析,确定了FEP色母粒中载体树脂、颜料和分散助剂的成分及三者的配比,FEP色母粒的加工设备和工艺条件,并将色母粒法与直接着色法进行了对比.实验结果为FEP色母粒中,载体树脂为熔体指数在4.5~8.5g/10min的FEP粉料,颜料为可耐380℃以上高温的无机颜料,分散助剂为分散剂D(Tm=204℃,Td=427℃);为满足FEP着色成品介电性能要求,颜料含量不可过高,且分散要好,进而确定了颜料与分散剂D的最佳添加量;双螺杆挤出机加工FEP色母粒较单螺杆挤出机的剪切及塑化更充分,利于颜料进一步分散.实验表明颜料在FEP着色成品中分散效果,色母粒法远优于直接着色法. 相似文献
3.
介绍ABS色母粒的制造工艺与应用。ABS色母粒主要由树脂载体、着色剂及各种助剂构成。着色剂含量高达40%,用于ABS色母粒的着色剂包括各种染料、有机及无机颜料。载体树脂主要有抗冲ADS或AS/ABS掺混物,AS的加入有利于破碎和造粒。讨论了影响着色剂在色母粒中分散的因素,认为颜料微粒化,控制在0.3μm左右是分散均匀的关键,分散剂和表面活性剂的加入有利于颜料的分散和稳定。与通常采用的色粉着色和色浆着色相比,ABS色母粒着色可降低成本,改善劳动条件,制取色正的制品。 相似文献
4.
透明聚丙烯专用色母粒的研制 总被引:3,自引:0,他引:3
通过对载体树脂、颜料和分散剂的筛选,探讨了不同载体树脂、颜料和分散剂对着色制品透光率及其流变性、耐候性的影响,研制出了性能优良的透明聚丙烯专用色母粒。开发出的色母粒不仅加工简单、使用方便,而且具有较强的着色能力,更为重要的是它几乎不影响体系的透光率。 相似文献
5.
6.
塑料加工厂要制成各种颜色的制品,必须经过着色,目前国内普遍采用干粉着色法,即将粉状颜料加入树脂中进行着色。该法由于颜料粉尘污染,分散不好等原因,国外已基本不采用,而是将颜料和树脂预先混合造粒制成颜料含量多的塑料色母粒,以塑料色母粒与树脂混合加工制成塑料制品。我 相似文献
7.
通过X射线光电子能谱仪、X射线衍射仪及扫描电镜对钴蓝颜料元素种类及含量、结晶性能、颜料粒子形貌及分布的研究,了解两种钴蓝颜料的微观差异;将两种钴蓝颜料应用于色母粒,采用积分球式测色仪、显微镜和熔体流动速率仪,分析了色母粒及其着色制品的着色力、分散性能、遮盖性能及色母粒的加工流动性能差异。结果表明,恰当的钴铝含量可以使钴蓝颜料在制品中有良好的着色效果;颜料表面元素中碳含量高有利于颜料在塑料中的分散,制备的色母粒加工流动性能更好;原生粒子小的钴蓝颜料充分分散后其着色效果比原生粒子大的更好;而对于40%钴蓝颜料含量的色母粒,采用5%的蜡作为分散剂,可以达到很好的分散效果。 相似文献
8.
<正>目前,塑料的着色方法主要有色粉、色母粒和预染色等,用塑料色浆着色是一种较新的方法。塑料色浆是分散在天然有机载体中的液体颜料。色浆也称为色油,与色母粒的原理相似,只是色浆是用油作为载体,而色母粒是用树脂作为载体。1色浆简介色浆是利用不同的颜料,通过对颜料表面处理、表面包裹等技术,经过严密的加工工艺研制而成的一种有颜料浓缩浆。色浆有多种分类方法,其中根据色浆所使用的溶剂不同,色浆分为水性色 相似文献
9.
通过X射线光电子能谱仪、X射线衍射仪及扫描电镜对铜铬黑颜料元素种类及含量、结晶性能、颜料粒子形貌及分布进行研究,了解3种铜铬黑颜料的微观差异;并将3种颜料应用于色母粒,采用了积分球式测色仪、显微镜,分析了色母粒及其着色制品的着色力、分散性能和遮盖性能差异.结果表明:恰当的铜铬含量、粒度合适且均匀、结晶性能好可以使铜铬黑颜料在制品中呈现良好的着色性能、分散性能.当制备40%色母粒时,3种铜铬黑颜料若要达到最佳分散性能,其分散剂需要不同质量分数,颜料A需要7%、颜料B需要3%、颜料C需要1%.3种颜料均处于最佳分散性能时,铜铬黑A着色薄膜黑度值最大,样板明度值最小,表明颜料A着色性能最好. 相似文献
10.
11.
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。 相似文献
12.
D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
__________
Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
13.
15.
16.
Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
17.
18.
19.
A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
20.
醋酸纤维素取代基分布与性质的关系 总被引:9,自引:0,他引:9
分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。 相似文献