高流动性尼龙6的增强增韧改性研究

采用熔融共混方法,制备了高流动性尼龙6和尼龙6的增强增韧改性材料,考察了增韧剂添加量对改性材料的加工流变和力学性能的影响。结果表明,高流动性尼龙6的增强增韧改性材料的熔体流动性优于尼龙6的增强增韧改性材料,当增韧剂质量分数为10%~15%时,高流动性尼龙6的增强增韧改性材料力学强度和冲击韧性均优于尼龙6的增强增韧改性材料,实现了材料高刚度性能和高抗冲击性能的完美平衡。     

纳米硫酸钡增强增韧尼龙66

通过熔融共混法制备了纳米硫酸钡增强增韧尼龙66复合材料。研究了纳米硫酸钡含量对增强增韧尼龙66复合材料力学性能的影响。结果表明，纳米硫酸钡对尼龙66有显著的增强增韧作用。尼龙66的韧性、刚性和强度随着纳米硫酸钡含量的增加先增后减，在纳米硫酸钡质量分数为3％时，力学性能最优；对比空白样，缺口冲击强度提高了17．1％，弯曲强度和模量分别提高了5．74％和11．57％，拉伸强度和模量稍有提高。     

热塑性弹性体TPU增韧尼龙1010共混物的力学性能及形貌

分别以聚醚型和聚酯型热塑性弹性体（TPU）为增韧剂，以尼龙1010（PA1010）为基体，用德国HaaKePTW16／25p型双螺杆挤出机制备了PA1010／TPU增韧尼龙材料，研究了增韧尼龙材料的力学性能及相结构。结果表明：增韧尼龙材料的冲击强度得到显著的提高，聚酯型TPU的增韧效果优于聚醚型TPU的。SEM观察表明，聚醚型和聚酯型TPU均以较均匀的球状粒子分散于PA1010基体中，冲击断面有纤维化现象、呈多层断裂和粘连多层膜的形成。PA1010／TPU共混物的冲击强度随TPU含量的增加而增加，但考虑到在提高共混物冲击强度的同时也要保证增韧材料有足够的拉伸强度和断裂伸长率，TPU含量为15％（wt）的共混物具有较好的综合性能。     

增韧剂对玻纤增强尼龙66力学性能的影响

将玻纤增强尼龙66(PA66)和增韧剂通过双螺杆熔融共混挤出,制备增强增韧尼龙66复合材料。研究了三种增韧剂的加入量对尼龙66/玻璃纤维复合材料的拉伸强度、冲击强度及弯曲强度等力学性能的影响。实验结果表明:随着玻璃纤维含量的增加,共混体系的拉伸强度有大幅度的提高;随着增韧剂加入量的增加,尼龙66/玻璃纤维复合材料的拉伸强度和弯曲强度降低,冲击强度提高。增韧剂CMG9802的增韧效果优于另外两个增韧剂。     

玻璃纤维增强尼龙1010树脂的加工方法

本文介绍了将尼龙１０１０树脂加工成玻璃纤维增强尼龙１０１０的工艺、设备、消耗定额以及产品的分析方法。     

阻燃增强增韧尼龙66的制备及工艺研究

以十溴二苯醚和氮磷复合物为阻燃剂,以玻璃纤维为增强剂,加入自制增韧剂,制备了阻燃增强增韧尼龙(PA)66材料,并对其阻燃性能和力学性能进行了表征,研究了加工工艺对改性PA66材料性能的影响。     

用尼龙1010注射成型偏转线圈骨架

对尼龙１０１０与聚四氟乙烯海棒加工偏转线圈骨架的工艺及材料的各项性能进行了对比，分析了，阐述了用尼龙１０１０注射成型骨架代替聚四氟乙烯棒材机械加工的可行性心取得的经济效益。     

碳纤维增强尼龙复合材料的研制

本文将碳纤维和尼龙通过挤出共混制成复合材料，研究了碳纤维的用量、长度等因素及界面层对材料增强增韧的效果。     

尼龙11的增强增韧改性研究

选用纳米蒙脱土作为增强剂,聚酰胺弹性体作为增韧剂,对尼龙11(PA11)进行了增强和增韧改性,考察了各添加剂用量对改性PA11材料力学性能的影响。结果表明:添加质量分数5%纳米蒙脱土和质量分数4%聚酰胺弹性体时,改性PA11材料的增强增韧效果最佳。同时,改性后PA11材料经军用65#航空冷却液长期浸泡后,力学性能基本变化不大,具备优异的耐65#冷却液能力。     

UHMWPE粉末作为MC铸型尼龙增韧材料的研究

研究了UHMWPE作为增韧材料对MC铸型尼龙力学性能和耐磨性的影响.接枝后的UHMWPE经环氧树脂处理,填充到MC铸型尼龙体系中,当UHMWPE添加量为8%时,使MC铸型尼龙冲击强度达到最大值,冲击强度提高200%,磨损量降低60%,降低50%.冲击断面SEM照片分析结果表明:UHMWPE在MC铸型尼龙中能够均匀分散,并在断面变得较为粗糙,呈现韧性断裂的特征.     

阻燃低气味增强尼龙的研究

制备了阻燃低气味的增强尼龙。分析了玻纤加入、尼龙类型和尼龙处理方式对尼龙力学性能的影响;并研究了阻燃剂种类和用量对玻纤增强尼龙性能的影响,最后研究了除味剂种类和用量对玻纤增强尼龙性能的影响。结果表明:短纤增强PA66具有较高的刚性和韧性;PA66经烘烤后所得玻纤增强PA66的刚性较高,而PA66不经烘烤所得玻纤增强PA66的韧性较高;红磷对玻纤增强的PA66阻燃效果好,且不对其力学性能产生影响;随着红磷阻燃母粒用量的增加,玻纤增强PA66的阻燃性能先变好后变差,在红磷用量为21份时达到最佳;凹凸棒石和红磷对玻纤增强PA66有优异的协同阻燃作用,当凹凸棒石用量为在4份时,达到最佳。SW-120和尼龙塑料除味剂同时使用,对玻纤增强PA66的气味有显著的改善。     

聚丙烯的官能化及与尼龙1010相容性研究

对聚丙烯(PP)进行官能化,并研究了接枝单体含量、引发剂含量对接枝率和熔体流动速率的影响,再将不同接枝率的PP与尼龙1010共混,研究了接枝率对共混物机械性能及相容性的影响;用扫描电子显微镜观察共混物的形态,与未增容共混体系相比,增容后共混体系分散相尺寸明显变小。     

The phase inversion and morphology of nylon 1010/polypropylene blends

Noncompatibilized and compatibilized blends of nylon 1010/PP blends having five different viscosity ratios were prepared by melt extrusion. Glycidyl methacrylate-grafted-polypro-pylene (PP-g-GMA) was used as the compatibilizer to enbance the adhesion between the two polymers and to stabilize the blend morphology. The effect of the viscosity ratio on the morphology of nylon 1010/polypropylene blends was investigated, with primary attention to the phase-inversion behavior and the average particle size of the dispersed phase. The relationship between the mechanical properties and the phase-inversion composition was investigated as well. Investigation of the morphology of the blends by microscopy indicated that the smaller the viscosity ratio (ηpp/ηpa) the smaller was the polypropylene concentration at which the phase inversion took place and polypropylene became the continuous phase. The compatibilizer induced a sharp reduction of particle size, but did not have a major effect on the phase-inversion point. An improvement in the mechanical properties was found when nylon 1010 provided the matrix phase. © 1996 John Wiley & Sons, Inc.     

Fatigue fracture of long fiber reinforced nylon 66

The fatigue behavior of long fiber reinforced nylon 66 has been investigated by measuring fatigue crack propagation rates of injection molded samples. Plaques varying in thickness from 3 to 10 mm were employed for nylong 66 containing either glass, carbon or aramid fibers. Both conventional chopped, short fiber reinforcements and pultruded long fiber filled nylon 66 were examined. Long fiber reinforced nylon 66 exhibits improved fatigue resistance as shown by decreases in fatigue crack propagation rates compared to short fiber filled composites. Using a fracture mechanics analysis, it is shown that the improvements are due primarily to the higher moduli of the long fiber reinforced nylon 66, with only a slight increase in the calculated strain energy release rate associated with fatigue crack growth. For short or long glass fibers, and for short carbon fibers, the effects of fiber orientation on fatigue crack growth rates can be predicted from the fracture mechanics model. More significant effects of fiber length on fatigue fracture energies are noted for long aramid and long carbon reinforced nylon 66. It is also shown that thicker plaques can exhibit poorer fatigue fracture behavior owing to their inferior core sections.     

Glass fiber‐reinforced polyamide composites toughened with ABS and EPR‐g‐MA

A series of glass fiber‐reinforced rubber‐toughened nylon 6 composites was prepared. The mechanical properties and morphology of the composites toughened with ABS were investigated and compared with composites toughened with EPR‐g‐MA. A study of the mechanical properties showed that the balance of the impact strength and stiffness for both types of systems can be significantly improved by proper incorporation of glass fibers into toughened nylon 6. The differences between these two types of rubber‐toughened composites are significant at a high rubber content. However, the ductility of both composites toughened with rubber was significantly lower than that of blends without glass fiber. The relationships between rubber content, nylon 6 molecular weight, compatibilizer, processing, and mechanical properties are discussed. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 484–497, 2001     

润滑剂TAF在尼龙增强改性加工中的应用

研究了防玻纤外漏剂改性乙撑双脂肪酸酰胺(TAF)对尼龙力学性能、加工性能、外观质量等方面的影响,概括了TAF对注塑制品外观缺陷的改善.介绍了TAF在玻纤增强尼龙66、尼龙6中的应用实例.     

工艺条件对玻纤增强ABS材料力学性能的影响

通过对30％玻纤增强ABS材料微观形态观察和分析，探寻了加工工艺条件和加入马来酸酐接枝ABS对材料力学性能的影响，结果表明，加入马来酸酐接枝ABS可明显改善基体材料与玻纤的粘结状况，使力学性能得到较大幅度的变化，加工温度的提高和适当的螺杆转速可提高玻纤在基体中的分散性，尽管玻纤分散性较好的材料其玻纤含量较低，玻纤长度较短，但仍使力学性能得到改善。     

相容剂对长玻纤增强尼龙66树脂力学性能和流变行为的影响

采用自行研制的熔体浸渍包覆长玻纤装置,制备了长玻纤增强尼龙66(LGF-PA66)复合材料.研究了相容剂乙烯-辛烯共聚物接枝马来酸酐(POE-g-MAH)、三元乙丙橡胶接枝马来酸酐(EPDM-g-MAH)对LGF-PA66力学性能和流学行为的影响.结果发现:当相容剂质量分数为2.5%时,复合材料的拉伸强度最大,缺口冲击强度在相容剂质量分数为0%～10.0%范围内近似线性的增加,不同相容剂对力学性能的影响相似.运用了拉伸强度模型和缺口冲击强度模型对实验结果进行了解释.相容剂用量的增加导致了平衡扭矩线性的提高,但对实际加工并没有带来太大的影响.     

玻璃纤维粉煤灰增强尼龙复合材料的制备与性能研究

采用碱催化阴离子聚合反应制备玻璃纤维粉煤灰增强尼龙复合材料.研究了玻璃纤维表面偶联处理、粉煤灰的活化偶联处理以及两者加入时间和两者配比对复合材料力学性能和摩擦性的影响.结果表明:将经偶联处理的玻璃纤维、粉煤灰与催化剂一起加人己内酰胺单体,能够制备出性能良好的玻璃纤维粉煤灰增强尼龙复合材料;采用玻璃纤维和粉煤灰同时增强尼龙,两者表现出良好的增强效应;当玻璃纤维质量分数为30%、粉煤灰质量分数为10%时,所得的尼龙复合材料具有较好的力学性能.     

偶联剂处理纳米SiO2对尼龙1010力学与摩擦学性能的影响

用A171和KH550 2种硅烷偶联剂对纳米SiO2进行分散处理,然后用注射成型法制备了纳米SiO2/尼龙1010复合材料。研究了改性处理纳米SiO2对尼龙1010复合材料的结晶性能、力学性能以及摩擦学性能的影响。结果表明:纳米SiO2表面的改性处理均使尼龙1010基体的结晶度降低,而拉伸强度、硬度和耐磨性提高。A171处理纳米SiO2/尼龙1010复合材料的断裂伸长率大于纯尼龙1010。改性处理纳米SiO2使尼龙1010复合材料的摩擦因数降低。