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润滑剂添加前后成核剂对尼龙66结晶和力学性能的影响

时间:2017-03-19 14:48来源:毕业论文
论文用成核剂PNA012改性PA66,并添加了四种不同的润滑剂(ST、EBS、棕榈蜡、PETS)共设计了6种配方,来研究添加剂的加入是否提高了PA66的性能。本课题进行了如下几个实验:拉伸测试,

摘要:本论文用成核剂PNA012改性PA66,并添加了四种不同的润滑剂(ST、EBS、棕榈蜡、PETS)共设计了6种配方,来研究添加剂的加入是否提高了PA66的性能。本课题进行了如下几个实验:拉伸测试,三点弯曲测试,悬臂梁缺口冲击测试,热变形温度测试(HDT),熔融指数测试(MFI),差示扫描量热法测试(DSC),X射线衍射测试(XRD)。拉伸强度最大的是PA66+0.3wt%PNA012+1.5wt%EBS。成核剂和润滑剂的加入会使PA66的断裂伸长率减小,降低韧性。断裂伸长率最小的配方是PA66+0.3wt%PNA012+1.5wt%ST。弯曲强度的变化不明显,最大的配方是PA66+0.3wt%PNA012+1.5wt%ST。弯曲模量最大的配方是PA66+0.3wt%PNA012+1.5wt%EBS。冲击强度都有所下降,下降最多的配方是PA66+0.3wt%PNA012。热变形温度最高的配方是PA66+0.3wt%PNA012。流动速率最快的配方是PA66+0.3wt%PNA012+1.5wt%棕榈蜡。成核剂的加入使PA66的结晶过冷度有了一定的降低,使PA66的结晶度有所升高。加入润滑剂之后,结晶过冷度也有所降低。结晶度最大的配方是PA66+0.3wt%PNA012+1.5wt%ST,为38.33%。在加入了成核剂之后,PA66的β峰强度明显升高,无论是纯PA66还是添加了成核剂及润滑剂,β相总是大于α相。6654
关键词:PA66;润滑剂;成核剂
The influence of nucleation catalyst on the crystalline and mechanical property of PA66 whether adding the lubricant
Abstract:PNA012 have been prepared to modify PA66. Four lubricating agents (ST、EBS、 palm wax、PETS) are added. Six formulations are prepared to discover whether the performance of PA66 is proved by additive. Tensile test, 3-point bending test, Cantilever beam notched impact test, heat distortion temperature test (HDT), melt flow index test (MFI), differential scanning calorimetry (DSC), X-ray diffraction test (XRD) are used. The largest tensile yield strength is PA66+0.3wt%PNA012+1.5wt%EBS. The addition of nucleation catalyst and lubricant will weaken the elongation at break, as well as the tenacity. The formulation of minimum elongation at break is PA66+0.3wt%PNA012+1.5wt%ST. The formulation of maximum bending modulus is PA66+0.3wt%PNA012+1.5wt%ST. All formulations’ impact strength are weakened, which the most is the formulation of PA66+0.3wt%PNA012. The formulation of highest heat distortion temperature is PA66+0.3wt%PNA012. The formulation of the biggest flow rate is PA66+0.3wt%PNA012+1.5wt% palm wax. The addition of nucleation catalyst reduces the Crystallization degree of supercooling of PA66, and ascends the crystalline. When adding the lubricant, Crystallization degree of supercooling is also reduced. The formulation of the biggest crystalline is PA66+0.3wt%PNA012+1.5wt%ST, with the rate of 33%. When adding the nucleation catalyst, the β peak intensity of PA66 is elevated. Both pure PA66 and PA66 with nucleation catalyst and lubricant show that β phase always larger than α phase.
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 KeyWords:PA66;Lubricant;Nucleating agent
目录
1    绪论    1
1.1    文献综述    1
1.1.1    PA66的概述    1
1.1.2    润滑剂    1
1.1.3    成核剂    3
1.1.4    研究背景    4
1.2    课题研究的目的和意义    6
1.2.1    研究目的    6
1.2.2    研究意义    7
2    实验部分    8
2.1    主要原材料    8
2.2    主要仪器设备    8
2.3    试样的制备    8
2.3.1    试样配方    8
2.3.2    试样制备的步骤    9 润滑剂添加前后成核剂对尼龙66结晶和力学性能的影响:http://www.lwfree.cn/cailiao/20170319/4274.html
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