新型聚酯纤维PTT

绍聚对苯二甲酸丙二酯（PTT）纤维及其原料,1,3－丙二醇的发展概况、制备方法、纤维特性和用途。     

涤纶多孔微细纤维生产技术探讨

涤纶多孔微细纤维生产技术探讨陆宏亮，杨金梅（盐城化纤厂，２２４００１）（盐城化纤研究所２２４００１）随着纺织、印染技术的提高，多孔微细纤维以其真丝般的手感，良好的悬垂性和卷曲膨松性，已越来越为人们所喜爱。由其制成的高密织物具有良好的拒水、防风和透气性...     

多孔细旦涤纶纤维在国产设备上的开发

利用国产ＰＯＹ系列设备,开发涤纶细旦多孔纤维,提高设备利用率,通过工艺的合理调整,生产出用户满意产品。     

Unitika的新导电聚酯纤维

<正> Unitika纤维公司开发的高导电新聚酯长丝Megana ES,电阻在8×10~5Ω/cm,新产品为含碳双组分长丝,导电性比普通导电丝高2位数以上。主要用途有特殊环境用制服,如半导体厂中清洁室清洁服以及抗静电材料。 Unitika纤维公司于2003年开始销售,并计划第一年销售50万米。除该特殊聚合物组分外,Unitika纤维公司还建立了一种双组分长丝纺丝技术,以将材料的特性发挥至极     

新型纳米级聚酯纤维

通过采用众多纺丝技术,对纤维的结构控制已从微米级发展到纳米级。对纳米级纤维结构控制的重要性可以用两个方法来说明。一是给出模型或概念用以改善如结晶尺寸和分子取向这样的物理性质。这种方法是将宏观性能与纳米级结构联系起来,对聚合物设计和纤维结构来说是非常重要的。另一个方法是关于纳米纤维本身。此次研究将展现纳米纤维拥有哪些新的或者说优越的性能。     

发泡工艺制备多孔陶瓷研究进展

闭孔型多孔陶瓷是一类重要的耐温隔热材料,由于其具有很好的化学稳定性、较低的热传导等优良特性,被广泛应用于众多领域。发泡工艺是制备闭孔型多孔陶瓷的主要方法,本文综述了发泡工艺制备多孔陶瓷的孔形成机理、发泡剂的类型及其近年来在多孔陶瓷制备领域的研究进展。     

聚酯纤维母粒的制备及发展趋势

综述了聚酯纤维母粒的制备方法,并根据聚酯纤维母粒的发展现状总结出目前行业内存在的不足之处,最后分析了聚酯纤维的发展方向,并对聚酯纤维母粒行业的发展趋势作出了展望.     

双组分皮芯型PET蓄光长丝的制备

以绿色环保的稀土铝酸盐作为蓄光剂,以PET为基体制备蓄光母粒,然后用复合纺丝法制备以蓄光母粒为芯,PET为皮的具有蓄光纤维功能的复合纤维。利用DSC、SEM研究了蓄光母粒的热性质和蓄光剂在基体中的分布,考察了蓄光纤维的力学性能。DSC分析结果说明加入质量分数为10%的蓄光剂的熔融温度与纯PET基本相同,但结晶度温度提高了38℃,结晶度增加了7.25%。SEM分析表明,蓄光粉体与PET组成的共混体系相容性很好;蓄光纤维的断裂强度达2.9 cN/dt-ex,可以满足服用要求。     

Microcellular thin PET sheet foam preparation by compression molding

This study has created a new way of microcellullar processing PET thin sheet foam using a conventional hydraulic press by compression molding and by setting the temperature of press plates differently. Comparing this study with our previous work, the emphasis is on the difference of plate temperature. The nonisothermal condition is used to control the foaming agent decomposition to lead to more uniform cell size microcellular foam. A variety of cell sizes, cell densities, and relative densities are obtained as a consequence of the different foaming temperature, time, pressure, and foaming agent content via isothermal and nonisothermal conditions. The effect of isothermal and nonisothermal foaming on the cell size, cells density, and relative density has been discussed. The electrical properties of the microcellular poly(ethylene terephthalate) (PET) samples prepared in nonisothermal foaming have been investigated. The experimental results show that the microcellular PET foam has lower dielectric constant and dielectric loss and higher electric resistivity than unfoamed PET. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 1698–1704, 2004     

聚酯负离子纤维的制备及其性能研究

将表面改性过的电气石粉体加入到聚酯中,首先共混造粒然后将母粒与聚酯按照一定比例来纺丝。通过比较,研究了电气石粉体含量对切片热力学性质、纤维结晶性能及其力学性能的影响。并通过负离子测试仪测出添加质量分数为2%和4%的粉体的纤维的负离子释放分别达到460个/mL和480个/mL,为公园环境水平的2倍多。     

Low-density, microcellular polystyrene foams

Numerous applications have been identified for low-density, microcellular, polymeric foams. In this paper the authors describe a general technique to produce foams of this type with organic-soluble polymers, in particular polystyrene. Open-celled polystyrene foams have been developed with densities of 0.02–0.2 g cm⁻³ and uniform cell sizes of 1–20 μm. By using well-characterized polymers the authors have related form morphology to the phase diagram of the polymer/solvent system employed.     

负离子功能PET纤维的研制

选择超细电气石粉末作为新型功能添加剂,通过偶联剂表面修饰,对改性效果进行比较和表征,并制备了负离子功能聚酯纤维。研究了超细电气石粉末的表面改性及其在高分子基体中的分散性,以及PET共混体系和负离子功能纤维的性能。主要研究结果如下:对超细电气石粉末的表面改性,采用单烷氧型钛酸酯5%处理量的处理效果较佳,在普通纺丝速度范围内,PET共混体系的可纺性与PET一样稳定。经测试,试验纤维具有良好的物理机械性能和负离子发射功能(大于4500个/cm3)。     

凝固条件对PAN初生纤维微孔结构形态的影响

采用一维多取向小角X射线散射研究了聚丙烯腈细流在凝固过程中,凝固浴温度、浓度以及喷丝头拉伸比对初生纤维中微孔结构形态的影响。结果表明,凝固温度由30％提高到60℃时,微孔沿纤维轴取向增强,微孔尺寸减小,但微孔数量增加;凝固浴质量分数由67．5％升高到76．0％,微孔数量减少,但微孔尺寸变大,微孔沿纤维轴取向减弱;喷丝头拉伸比为-36．7％-10％时,微孔尺寸和取向角都增大。在凝固浴温度为52-55℃,凝固浴质量分数为70％,选择负拉伸能得到性能优异的初生纤维。     

Preparation and morphology characterization of microcellular styrene‐co‐acrylonitrile (SAN) foam processed in supercritical CO2

Microcellular polymeric foam structures have been generated using a pressure‐induced phase separation in concentrated mixtures of supercritical CO₂ and styrene‐co‐acrylonitrile (SAN). The process typically generates a microcellular core structure encased by a non‐porous skin. Pore growth occurs through two mechanisms: diffusion of CO₂ from polymer‐rich regions into the pores and also through CO₂ gas expansion. The effects of saturation pressure, temperature and swelling time on the cell size, cell density and bulk density of the porous materials have been studied. Higher CO₂ pressures (hence, higher fluid density) provided more CO₂ molecules for foaming, generated lower interfacial tension and viscosity in the polymer matrix, and thus produced lower cell size but higher cell densities. This trend was similar to what was observed in swelling time series. While the average cell size increased with increasing temperature, the cell density decreased. The trend of bulk density was similar to that of cell size. © 2000 Society of Chemical Industry     

Preparation and characterization of microcellular thin polycarbonate sheets

A new method was developed for the microcellular processing of polycarbonate (PC) thin sheets by compression molding above PC's glass‐transition temperature and below its melting temperature within a few minutes. The effects of the foaming time, foaming pressure, foaming temperature, and foaming agent active ratio on the cell size, cell density, and relative density were studied. The structures of the microcellular PC foam were controlled in the foaming process by carefully choosing the foaming parameters. In addition, the thermal, dynamic mechanical thermal, and electrical properties of the microcellular PC foam were investigated. A differential scanning calorimetry analysis showed that the microcellularly processed PC may have a plastication effect. The variation of the storage modulus, loss modulus, and tan δ under dynamic mechanical thermal analysis was in accord with the calorimetry analysis. The measurement of the electrical property demonstrated that the insulation ability of the microcellular PC thin sheet was obviously enhanced and the dielectric strength of the microcellular PC foam was decreased compared to the unfoamed PC. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1760–1766, 2006     

轮胎用PEN纤维与PET纤维性能研究

本文研究了PEN、PET 1100dtex、1670dtex纤维的原丝性能、捻线帘线性能、浸胶帘线性能。对浸胶后帘线进行了模拟硫化、蠕变、弯曲疲劳和粘合性能测试。浸胶PEN纤维帘线弯曲疲劳性能表现差之外,PEN纤维在原丝、捻线帘线、浸胶帘线保持更好的尺寸稳定性、更高的模量。PEN纤维浸胶帘线与橡胶具有良好的粘合性能。     

涤纶海岛超细复合纤维的生产

利用希尔斯纺丝生产线及其工艺纺制POY海岛型超细复合纤维,并介绍了切片预结晶干燥、海岛复合比例、纺丝温度、冷却成形、上油、卷绕等工艺条件。在FTF12SDS型拉伸变形机上采用合适的变形工艺可成功生产海岛型超细复合DTY。