PTT针织面料的开发与研究

对新开发的PTT弹力添纱针织面料的原料选用、编织和后整理进行了详细探讨,并对该面料的5个湿舒适性指标透湿率、导湿性、透气率、干燥率和保水率与已开发的棉/涤针织面料和Tactel/Lycra针织面料进行了比较,证明新开发的面料具有良好的湿舒适性,是制作运动服的理想面料。     

PTT/PET双组分长丝在针织无缝内衣上的应用及其产品性能

PTT／PET双组分长丝是一种具有优良弹性的新型聚酯纤维，利用该双组分长丝、锦纶包芯纱、PTT、锦纶为原料，在圣东尼SM8TOP2上采用添纱组织编织5种不同的织物，经过相应的染色和后整理，对它们的弹性、吸湿透气等服用性能进行测试比较，研究了PTT／PET双组分长丝纤维在针织全成型内衣上应用的优势和不足。     

The Effect of Vulcanized Thermoplastics and SEBS on the Impact Strength of PPT

Poly(trimethylene terephthalate) (PTT) is a semi crystalline engineering polymer. It has high physical and mechanical properties like tensile, flexural, stiffness, processabilty and chemical resistance. However, low impact strength limits its versatility. Impact modification of PTT using SEBS and PP-g-EPDM was successfully carried out. The blends of poly(trimethylene terephthalate) (PTT)/styrene-ethylene/butylene-styrene (SEBS) and poly(trimethylene terephthalate) (PTT)/ethylene propylene diene monomer (EPDM) with different composition have been studied. The investigation in the effect of SEBS and PP-g-EPDM on mechanical, thermal, rheological and morphological properties with PTT was done. The tensile strength and flexural strength showed some decrease with increase in concentration of SEBS and PP-g-EPDM in PTT. The impact strength of PTT, however, was found to increase significantly with increasing SEBS and PP-g-EPDM content. The examination of etched surfaces of PTT/SEBS and PTT/PP-g-EPDM using scanning electron microscopy indicated significant improvements in interfacial adhesion. It was found that the addition of SEBS and PP-g-EPDM at higher content reduces the droplet size of the dispersed phase. This is an indication of interfacial saturation of PTT/SEBS and PTT/PP-g-EPDM. Rheological characterization has showed a shear viscosity increased due to the addition of SEBS and PP-g-EPDM in PTT. It means these rheological properties also support for the improvement of impact strength. Thermal properties using differential scanning calorimetric (DSC) results did not show any significant changes.     

PTT针织物的开发优势及前景

PTT纤维是一种新型纤维，具有优异的回弹性和易染性。本文主要介绍了PTT纤维的主要特性，尤其是其优异的弹性回复性，PTT针织服装方面开发优势和前景，指出PTT在针织弹力服装市场中必将有广阔的前景。     

PTT纤维的加工技术与性能

综述PTT的聚合纺丝、后加工技术及纤维的性能。指出PTT集良好的可加工性、机械性、热塑性、延伸性、高弹性、尺寸稳定性和染色性等性能于一体,优于PET、PA,可广泛应用于工程塑料、薄膜和纤维等领域。可利用现有的PET的缩聚和纺丝设备,加快我国PTT纤维工业化的进程。     

地空通信和卫星通信组网实现电台的远程控制

地空话音通信在民航、军航以及许多军事指挥系统中有广泛应用.介绍了卫星通信系统与地空通信系统组网方式,实现20部地空电台的远程集中控制,完成区域指挥中心(SOC)对空指挥功能,并对其技术实现进行了探讨.     

PTT/PET自卷曲纤维的内部结构和弹性回复性能

通过FT-IR、DSC和显微镜观察分析了PTT/PET自卷曲纤维的化学组成结构、结晶度和横截面形状。PTT/PET纤维作为一种弹性纤维,其弹性来自于PTT组分,而湿热处理后的纤维弹性则来自于其独特的卷曲结构。     

PTT纤维的特点及开发前景

从大分子结构、结晶结构、形态结构等方面介绍了PTT纤维的结构特点,从力学性能、热学和染色性能等方面介绍了PTT纤维的基本物理和化学性能。并对PTT纤维的应用和开发前景进行了展望。     

用有限体积法对粘弹性流体的扩张流动进行数值模拟

采用Phan-Thien-Tanner(PTT)本构方程,描述油藏条件下以第一法向应力差为主要特征的聚合物溶液的流变性.利用有限体积法对粘弹性聚合物溶液在突扩孔道内的流动特征进行数值模拟;绘制了流函数和速度等值线图、轴向距离与中心线速度图;研究了粘弹性的变化对微观波及效率的影响.数值模拟结果表明,聚合物溶液的粘弹性是影响波及效率的主要因素.凸角处的流动区域随着弹性的增加而不断增大,因此滞留区域不断减小,微观波及效率不断增大;具有粘弹特性的聚合物溶液相比于纯粘性的牛顿流体更利于提高驱油效率.     

羊绒／丽赛纤维／PTT多组分半精纺纱的开发

采用羊绒、丽赛纤维和PTT纤维为原料,以毛纺设备和棉纺设备相结合,应用半精纺纺纱工艺纺制羊绒,丽赛纤维/PTT多组分半精纺纱.首先对3种纤维的性能进行了分析,介绍了半精纺的工艺生产过程和半精纺设备的选型和配置,探讨了纺纱各工序主要工艺参数和关键技术措施,成功纺制了性能优良的羊绒/丽赛纤维/PTT半精纺纱.用该纱制成的织物手感柔软、滑爽、富有弹性、尺寸稳定,具有较高的经济效益.