结晶性塑料注塑成型

1什么是结晶性塑料? 结晶性塑料有明显的熔点,固体时分子呈规则排列.规则排列区域称为晶区,无序排列区域称为非晶区,晶区所占的百分比称为结晶度,通常结晶度在80%以上的聚合物称为结晶性塑料.常见的结晶性塑料有:聚乙烯PE、聚丙烯PP、聚甲醛POM、聚酰胺PA6、聚酰胺PA66、PET、PBT等.     

硅灰石的深加工及在塑料工业中的应用

介绍了硅灰石的性能、深加工技术,及其硅灰石的深加工产品在尼龙、聚四氟乙烯、聚丙烯、聚乙烯等塑料中的应用效果。     

碳纳米管增强聚酰胺纤维的研究进展

综述了碳纳米管(CNT)在聚酰胺6(PA6)以及聚酰胺66(PA66)纤维中的应用,并对CNT-PA复合纤维的研究方向进行了展望。     

聚酰胺塑料的物理力学性能评价

聚酰胺塑料是一种用途广泛的热塑性工程塑料。本文对目前我国已批量生产的PA6、PA66和PA1010三个较大品种的吸水性、硬度、摩擦磨耗、蠕变、拉伸、冲击、弯曲、压缩和热性能等全面的物理力学性能进行了评价试验;并和日本产的1022B PA6怍了一些对比。结果表明,综台物理力学性能PA66优于PA6,后音又优于PA10lO;国产PA6和日本产1022B则性能接近。     

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     

聚酰胺6／蒙脱土与聚酰胺66／蒙脱土纳米复合材料性能比较

将三种不同插层剂改性的蒙脱土与聚酰胺6和聚酰胺66通过熔融共混分别制得纳米复合材料，对其热性能和力学性能进行了研究，对不同插层剂的改性效果和聚酰胺6、聚酰胺66两类纳米复合材料的性能进行了比较。结果显示，所有复合材料的热变形温度、拉伸模量、屈服强度、弯曲模量和弯曲强度均比纯树脂的要高，而断裂伸长率和缺口冲击强度则有所下降；蒙脱士对聚酰胺6的改性效果明显好于对聚酰胺66；三种插层剂中，含羟基的季铵盐改性效果最好，含两个长链烃基的铵盐改性效果最差。     

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。     

聚酰胺塑料在汽车工业的应用现状与前景

介绍国内外汽车用聚酰胺塑料的开发及应用现状与前景，对我国汽车聚酰胺塑料的研究和开发提出了相应的建议。     

羧基化聚丙烯对聚丙烯／极性聚合物的增容作用

探讨了一种全新方法制备的羧基化聚丙烯(EPP)在聚丙烯／聚酰胺(PP／PA6)，聚丙烯／聚乙烯醇(PP／PVA)共混物制备过程中的增容作用。实验结果表明，EPP的加入，使共混物的拉伸强度显著提高；扫描电镜及偏光显微形态分析表明，EPP改善了共混物的相容性，是一种性能优良、价廉、易得且环境友好的偶联剂。     

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。     

二元聚酰胺对丁腈橡胶／三元聚酰胺TPV结晶行为及性能的影响

研究了二元聚酰胺对丁腈橡胶／三元聚酰胺热塑性弹性体性能的影响。结果表明：二元聚酰胺对三元聚酰胺有成核剂效果；二元聚酰胺的加入可加速TPV中塑料相的结晶速率、减小其晶粒尺寸、增大结晶度，从而显著提高TPV的100％定伸应力及耐溶剂性。     

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。     

聚酰胺工程塑料生产、市场及其趋势

综述了全球聚酰胺工程塑料生产、市场、应用结构、需求预测和最新动向等,包括全球不同地区和国家聚酰胺6和聚酰胺66工程塑料的生产能力、消费量,在汽车和电子电器等工业上的应用,未来供需趋势和价格预计,并介绍了中国聚酰胺工程塑料工业现状。     

The investigation of melamine polyphosphate flame retardant polyamide‐6/inorganic siliciferous filler with different geometrical form

Melamine polyphosphate (MpolyP) was used to flame retard polyamide‐6 filled with siliciferous fillers including fibrous wollastonite, laminar talc, and spherical glass bead. The mechanical performance, flame retardancy of these flame retarded materials, and the influence of these fillers on charring behavior were investigated. The results show that wollastonite/MpolyP/PA6 system has the best mechanical properties as compared with talc/MpolyP/PA6 and glass bead/MpolyP/PA6 system due to good reinforcing effects of the fibrous filler in resin matrix. Otherwise, the char morphology observation shows that spherical glass beads separates from the char matrix during the expansion of the char layer, which hardly improves the char quality. However, fibrous wollastonite and laminar talc can well combine with the char layer, thus enhancing the flame retardancy as a part of the charred layer. It is proved that the laminar talc favors the formation of more condensed char because of its barrier effects, and the fibrous wollastonite with quite high aspect ratio can effectively reinforce both the resin and the charred layer, which leads to the remarkable improvement of the flame retardancy. Consequently, polyamide‐6/MpolyP/wollastonite system shows the best flame retardancy among the above systems. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

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     

Synergistic effect of melamine polyphosphate with macromolecular charring agent novolac in wollastonite filled PA66

In this article, macromolecular charring agent linear novolac (NA) was served as a synergist with nitrogen‐phosphorous flame retardant melamine polyphosphate (MPP) for the flame‐resistance of wollastonite (WT) filled polyamide 66 (PA66). The investigations showed that MPP/NA system possessed obvious synergistic effects by increasing the charring rate and amount, therefore, showing much higher flame retardancy than the filled PA66 flame retarded with MPP alone. The corresponding char layer structure of MPP/WT/PA66 and MPP/NA/WT/PA66 was investigated and their difference was analyzed. In addition, as a multifunctional additive, NA could act as a compatibilizer and lubricant in the system, and endowed the material with improved mechanical performance and processability. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

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     

世界聚酰胺工程塑料市场及预测

综述世界聚酰胺工程塑料的生产厂家、生产能力、市场及消费结构，重点阐述美国、欧洲、日本等工业发达国家和地区的聚酰胺工程塑料的供需状况，指出聚酰胺6和聚酰胺66市场占聚酰胺市场总量的90％左右。预计2000－2006年间聚酰胺工程塑料市场以年均5％－6％速率增长，新用途有汽车发动机吸气歧管、耐热电子电器制品和阻隔包装等。     

高含量玻璃纤维增强阻燃聚酰胺材料的制备与性能

采用双螺杆挤出机制备了聚酰胺6(PA6)/50%（质量分数,下同）玻璃纤维（GF）、PA66/50%GF、PA56/50%GF 3种高含量GF增强阻燃PA复合材料,对比研究了红磷、溴系、磷氮3种阻燃体系下复合材料的力学性能、阻燃性能和激光打标性能。结果表明,不同阻燃体系对复合材料的力学性能有明显影响,吸水平衡后,PA66复合材料的力学性能保持率最高;PA56复合材料在3种阻燃体系中均表现出比PA6、PA66复合材料更好的阻燃性能;红外激光和紫外激光的打标效果存在明显不同,而在阻燃体系和激光光源相同的条件下,PA6、PA66和PA56 3种PA复合材料的激光打标效果没有明显差异。