共查询到19条相似文献,搜索用时 195 毫秒
1.
研究了不同种类的润滑剂对硬质聚氯乙烯/丙烯腈-丁二烯-苯乙烯共聚物(RPVC/ABS)合金流变性能的影响。结果表明:低熔点的润滑剂和石蜡对RPVC/ABS合金的塑化性能影响很小,并且石蜡与ABS的相容性很差,非常容易析出,限制了其在RPVC/ABS合金中的应用;高熔点的润滑剂可明显延长合金的塑化时间,降低平衡扭矩。在相同试验条件下,润滑剂A的外润滑效果明显好于乙撑双硬脂酰胺(EBS)的。注塑试验发现,添加润滑剂A的RPVC/ABS合金具有良好的注塑加工性能,并且注塑样片的白度提高,黄色指数降低,可以满足合金的长周期注塑要求。 相似文献
2.
《弹性体》2017,(2)
利用正交实验方法研究了ABS树脂常用润滑剂的作用机理。设计了2因素3水平的正交实验,研究了乙烯基二硬脂酰胺(EBS)、硬脂酸镁两种润滑剂的内润滑和外润滑作用,通过低剪切速率下的融流指数表征内润滑效果,利用哈克流变仪剪切扭矩及塑化时间表征高剪切条件下外润滑作用。结果表明,EBS具有较强的内润滑作用,对ABS树脂的融流指数贡献率达到95.43%;硬脂酸镁的润滑作用机理与EBS相同,但润滑效果不如EBS,其对ABS树脂的融流指数贡献率只有2.64%,两种润滑剂对哈克流变塑化时间影响不大,因此外润滑作用不明显,且两种润滑剂对塑化时间和扭矩的贡献率相同,都在50%左右。 相似文献
3.
4.
改性EBS类润滑剂在塑料母粒制造中的应用研究 总被引:13,自引:0,他引:13
周健 《现代塑料加工应用》1999,11(6):35-37
在分析了新型改性EBS类塑料润滑剂TAS -2A(商品名 )分子结构的基础上 ,提出了该润滑剂在几种塑料母粒制造中的应用情况 ,研究了该润滑剂在制造ABS色母粒、PP阻燃母料、PE珠光母粒及PE黑母粒等的应用效果。结果表明 :TAS -2A润滑剂在塑料母粒制造中有良好的润滑性和加工性 ,并使塑料制品有更高的光泽性。 相似文献
5.
6.
7.
8.
9.
分别以乙撑双硬脂酰胺(EBS)、双羟基乙基乙撑双硬脂酰胺(HBS)为润滑剂,聚丙烯(PP)为基体,采用熔融共混法制备了PP/HBS、PP/EBS聚合物润滑体系,研究了EBS、HBS的用量对复合体系熔体流动速率、复数黏度、拉伸强度以及挥发性有机化合物(VOC)的影响。结果表明,EBS、HBS对PP具有良好的润滑作用,其中HBS对PP具有更好的润滑效果,当润滑剂HBS的用量为1.0 %(质量分数,下同)时,复合体系的熔体流动速率增加了404.8 %;HBS、EBS对PP中的VOC具有抑制作用,其中HBS的抑制效果比EBS更明显。 相似文献
10.
11.
12.
Acrylonitrile–butadiene–styrene (ABS) shows excellent impact resistance and good stiffness. The incorporation of thermoplastic elastomer into ABS may consist in an interesting approach to further improve the toughness of ABS, in addition to tuning its compatibility with reinforcements. Blends of ABS and styrene–butadiene–styrene (SBS) were obtained by extrusion from different types of ABS with different SBS contents. The results showed that morphology and mechanical behavior of ABS/SBS blends depend strongly on the composition and characteristics of ABS matrix. An increase in elongation at break and slight decrease in modulus could be observed by increasing SBS content. ABS/SBS blend possessing good dispersion of rubber particles with sizes ranging from 0.1 to 0.8 μm of rubber particles exhibited the better performance of the impact resistance, whereas blends showing a predominance of relatively large particles resulted on poorer mechanical properties. These results suggest that viscosity and composition of ABS matrix play a significant role on the dispersion and coalescence of the dispersed phase during mixing. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47075. 相似文献
13.
14.
15.
石墨烯是一种具有优异自润滑、力学和热学等特性的新型材料,虽然在润滑油领域具有很好的应用前景,但因其在润滑油中的分散性较差、容易团聚而限制了它的广泛应用。通过在石墨烯表面接枝长链烷烃得到了亲油型改性石墨烯(MGM),且改进了润滑油添加剂(LOA)的配方以加强润滑油和石墨烯的相互作用、促进石墨烯的稳定分散并协同石墨烯发挥润滑作用,最终得到了具有极佳助润滑性能和稳定分散性的石墨烯润滑油添加剂(MGLOA)。结果表明,MGM和LOA在其它市售润滑油中的最佳添加量分别为0.004%(质量)和5%(质量),此时润滑油的极压润滑性能能够提高11倍以上,且在应用过程中展现出了很好的降温、降噪和减振作用。 相似文献
16.
The melt strength of homopolymer, copolymer and high melt strength (HMS) grades of polypropylene (PP) was measured to assess the sagging resistance of PP for thermoforming applications. Acrylonitrile-butadiene-styrene (ABS), which can be easily processed during thermoforming, was also studied in this work. A polymer with high melt strength is considered to have a better sagging resistance. The melt strength measurements were carried out using a Gottfert “Rheotens” melt strength tester. The melt strength of the polymers increased with decreasing temperature and increasing extrusion rate. ABS generally had the highest melt strength in the low extrusion temperature region approaching the thermoforming region, indicating that it has a good sagging resistance during thermoforming. The HMS PP had significantly higher melt strength than conventional PP grades; therefore HMS PP is expected to have an improved sagging resistance. For conventional PP, melt strength was higher for the lower melt flow index (MFI) grades. A sharp increase in the melt strength was observed for conventional PP at low extrusion temperature, probably due to flow-induced crystallization of the PP. These results indicate that to minimise the sagging problem with conventional PP, low MFI grades should be used and thermoforming should be performed at temperatures close to the melting point of PP. 相似文献
17.
18.