TLCPa对PA 6/PA 66相容性及结晶行为的影响

采用溶液共混法制备了聚酰胺6(PA 6)／聚酰胺66(PA 66)/热致聚酰胺液晶(TLCPa)共混物,分析了TLCPa对PA 6／PA 66相容性及结晶行为的影响。差示扫描量热法分析表明,TLCPa的加入改善了PA 6和PA 66之间的相容性,PA 6／PA 66共混物结晶受到抑制;傅里叶变换红外光谱研究表明,TLCPa和PA 6、PA 66分子间形成了大量的分子间氢键,是TLCPa改善共混物相容性的主要原因;广角X射线衍射分析表明,TLCPa的加入没有影响共混物的晶型结构,当w(TLCPa)大于10％时,共混物的结晶度明显下降。     

热裂解气质联用鉴别PA56、PA66和PA6

采用热裂解气质联用（Py-GC/MS）方法鉴别聚酰胺56（PA56）、聚酰胺66（PA66）和聚酰胺6（PA6）及其共混物。结果表明,在550 ℃裂解温度下,PA56与PA66相对丰度100 %的峰为环戊酮,分别具有特征裂解产物1,8-二氮杂环十三烷-2,7?二酮和1,8-二氮杂环十四烷-2,7-二酮,PA6相对丰度100 %的峰为己内酰胺;此方法可用于快速鉴别PA56、PA66和PA6的工业初级品,并成功检出了PA6/PA56共混物、PA6/PA66改性共混物与改性PA66。     

聚酰胺的吹塑

论述了聚酰胺(PA6与PA66)的吹塑,着重介绍了几种可改善PA吹塑性能的改性方法。     

生物基PA56纤维在乘用车轮胎冠带层中的应用研究

分别以规格为930 dtex的聚酰胺56(PA 56)纤维和聚酰胺66(PA 66)纤维为原料,经织布、浸胶,并按照乘用车冠带层压延工艺标准进行压延附胶、裁断后用于轮胎195/70R1495T XL K737和245/45ZR19102Y XL N906两种不同规格乘用车轮胎冠带层,对比考察了PA 56纤维在乘用车轮胎...     

朗盛公司新型吹塑级PA产品问世

<正>在德国曼海姆举行的汽车工程用VDI塑料研讨会上,德国材料生产商朗盛公司(LanxessGmbH)将介绍新型聚酰胺6(PA6)和聚酰胺66(PA66)特殊吹塑成型     

差别化聚酰胺6纤维的研究进展

介绍了原位聚合、物理共混、复合纺丝和后处理等技术制备差别化聚酰胺6(PA6)纤维的方法,探讨了特黑超细PA6纤维、阻燃PA6纤维和导电PA6纤维的国内外研究进展。     

TLCPa/PA 66的非等温结晶动力学

研究了新型热致液晶聚酰胺(TLCPa)与聚酰胺(PA)66熔融共混物的非等温结晶行为。w(TLCPa)为0～30％的共混物的结晶温度和结晶度分别从PA 66的235．83℃和39．8％逐步下降为224．70℃和30．8％．PA 66的结晶明显受到抑制。w(TLCPa)为10％的共混物的Ozawa指数从PA 66的3～4降为2左右,共混物有着不同于纯PA 66的成核和晶体生长机理。TLCPa与PA 66具有较好的相容性。     

生物基聚酰胺56帘线的性能研究

研究新型生物基聚酰胺56(PA56)纤维及浸胶帘布性能。结果表明:PA56纤维性能与锦纶66(N66)纤维相当;PA56浸胶帘布的常温和高温物理性能、耐热性能、动态疲劳性能及粘合性能与N66浸胶帘布差异不大。新型生物基PA56帘线可用作轮胎冠带层骨架材料。     

PA66／TLCP原位复合材料的热性能、形貌及力学性能研究

通过挤出和注射成型制备了聚酰胺66／热致液晶聚酰胺（PA66／FLCP）原位复合材料，研究了其热性能、形貌及力学性能。DSC分析表明，PA66和TLCP相容性较好，随着TLCP含量的增加，PA66的结晶度、结晶速率下降；SEM分析表明，TLCP在PA66基体中分散均匀，两相相容性较好，当加入10％（质量分数，下同）的TLCP时，TLCP形成长径比比较大的纤维；拉伸试验结果表明，当加入TLCP后，PA66的力学性能有明显的改善。当加入10％的TLCP时，共混物的力学性能增幅最大，拉伸强度增加79．6％，拉伸模量增加120．4％，断裂伸长率明显下降。     

世界PA6和PA66工程塑料生产概况及需求动向

聚酰胺(PA)材料自从20世纪50年代初开始作为工程塑料应用以来，由于PA有多种基础树脂，又有良好的机械性能、耐热性能和耐药品性能，其用途不断扩大。在2001年全球PA工程塑料需求中PA6和PA66约占90%(见表1)，其中包括用     

Chemical structure and compatibility of polyamide–chitin and chitosan blends

This work presents a comparative study of the compatibilization of four binary blends with slight differences in their chemical structures. The natural polymers chitin (QA) and chitosan (QN) are blended with polyamide 6 (PA6) and polyamide 66 (PA66). The results, obtained using differential scanning calorimetry, infrared spectroscopy, and light and scanning electron microscopy, gave the following compatibilization sequence: PA6/QN ≈ PA66/QN > PA6/QA > PA66/QA. This behavior could be related to the ability of QN to form hydrogen bonds and also to the capability of the packing of PA66. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 850–857, 2000     

Toughness optimization of glass‐fiber reinforced PA 6/PA 66‐based composites: Effect of matrix composition and colorants

Mixing of polyamide 6 (PA 6) and polyamide 66 (PA 66) is integrated in the trend of development of new and improved materials by combination of different polymers and some reinforcing materials to polymer composites. The specific polymer composite PA 6/PA 66 reinforced with short glass‐fibers combines the good coloring of PA 6, and the small moisture absorption of PA 66. Technical applications of PA 6/PA 66 composites are mainly used in the automotive industry. Specific requirements of this industry lead to the necessity to optimize the material resistance against crack propagation of the PA 6/PA 66 composites, using mechanical and fracture mechanical methods. So, the present investigations focus on fracture mechanics toughness optimization of the PA 6/PA 66 composites, including unstable and stable crack growth. The aim of this toughness optimization is to find out the optimal mixing ratio of PA 6/PA 66. Applications of PA 6/PA 66 in the automotive industry and specific client wishes are the main reasons for black‐coloring of the PA materials. The influence of several black‐colorants (carbon black, nigrosine, spinel, iron oxide) on mechanical and fracture mechanical properties of the PA composites is also investigated using fracture mechanical methods. As experimental fracture mechanical method, preferentially, the instrumented Charpy impact test (ICIT) and the new cut method to determine the stable crack growth of glass‐fiber reinforced materials was used. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

硅灰石在塑料中的应用

研究了硅灰石对聚酰胺6、聚酰胺66及聚丙烯性能的影响。在聚酰胺6、聚酰胺66及聚丙烯中加入硅灰石提高了塑料的力学性能、耐热性能、尺寸稳定性,降低了吸水率和生产成本,扩大了塑料的应用领域。介绍了硅灰石的应用工艺,包括喂料、表面改性等。硅灰石在塑料中的应用有着广阔的发展前景。     

纳米PA替代PA6作基础树脂用料的研究

介绍了纳米聚酰胺（PA）的制备方法,并在PA6的传统应用领域内将纳米PA与PA6进行了性能对比,试验证明,纳米PA具有更好的刚性、耐热性,透明性等性能,完全可以替代PA6作为基础树脂用料。     

裂解气相色谱-质谱法研究锦纶66

采用热裂解气相色谱-质谱联用技术,对锦纶66的裂解规律进行分析研究,建立了锦纶66的定性分析方法。试验结果表明:当裂解温度为500℃时,可以最大限度显示锦纶66的特征信息;锦纶66的特征裂解产物是环戊酮和1,6-己二胺。     

Novel composite nanofibers based on polyamide 66/graphene oxide- grafted aliphatic- aromatic polyamide: preparation and characterization

New polyamide 66/graphene oxide (GO)-grafted aliphatic-aromatic polyamide (polyamide-imide) (PAI) (PA66/GOF) composites nanofibers were successfully prepared via electrospinning method for the first time. An polyamide imide (PAI) was synthesized using polycondensation reaction from a dicarboxylic acid and a diamine based on 4,4′-(4,4′-isopropylidenediphenyl-1,1′-diyldioxy) dianiline, and characterized by ¹HNMR and FTIR. Morphological, structural, thermal and mechanical characteristics of the nanocomposite fibers were investigated by means of SEM, TEM, WAXD, DMTA and TGA techniques. Composites nanofibers of PA66/GO, PA66/PAI and PA66/GOF with smooth surface, uniform structure as well as with diameter ranging from 195 to 784 nm were obtained. The GO incorporation caused a reduction in the nanofibers diameters. The TEM images showed that the GO was well dispersed in the PA66 nanofibers without significant aggregation. An approximately 10 °C temperature increase in the glass transition temperature of PA66 was achieved by addition of 0.5 wt% of PAI, resulting from aliphatic-aromatic structure of PAI. By the TGA results, an increase about 40 °C was observed in the thermal stability of PA66/PAI composite nanofibers in comparison with that of pure PA66 nanofibers.     

E-MA-GMA增容剂对PPS/PA66共混体系性能的影响

研究了增容剂乙烯(E)-丙烯酸酯(MA)-甲基丙烯酸缩水甘油酯(GMA)共聚物(E-MA-GMA)对聚苯硫醚(PPS)/聚酰胺(PA)66共混体系的相容性、力学性能、热性能、流变性能的影响。结果表明,增容剂的加入,增加了共混体系的相容性,提高了共混物的力学性能;DSC结果表明,E-MA-GMA影响共混体系的结晶和熔融行为;流变性能测试结果表明,增容PPS/PA66共混体系是假塑性流体,E-MA-GMA用量增加,使共混体系的表观黏度增大。     

PE-g-MAH增容PA 66/POE的形态与性能

使用马来酸酐接枝聚乙烯(PE-g-MAH)作为乙烯-辛烯共聚物(POE)增韧聚酰胺(PA)66的增容剂,研究了PE-g-MAH用量对PA 66/POE共混物的力学性能和形态影响。随着PE-g-MAH用量的增加 PA 66和POE的相容性显著改善,共混物中各组分的熔融峰温下降;共混物的缺口冲击强度显著提高,断裂伸长率成倍增大,韧性也有提高。当w(PE-g-MAH)为8%时,增容效果较好。