PBT/PET并列复合纤维的研究——第一报 纺丝拉伸工艺与纤维结构性能的关系

本文从理论上探索了双组分纤维的结构特点;对PBT/PET并列型复合纤维的纺丝、拉伸工艺进行研究,寻求加工工艺与复合纤维结构性能的内在联系;为制备性能优越的PBT/PET复合纤维提供理论依据。同时,通过大量的工艺实验得到了物理机械性能优异的PBT/PET并列型复合纤维。     

PBT/PET双组分体系熔体流变性能的研究——第二报 共混熔体流变性能的研究

对PBT/PET共混体系的熔体流动性能和粘弹性能进行了一系列的研究,并对其相形态结构作了探索,为PBT/PET共混纤维的进一步研制提供了理论依据和实验基础。     

PET/PBT反应性共混纺丝初生纤维的结构性能研究

通过反应性共混纺丝的方法制备了一系列PET /PBT初生纤维,并对其结构和性能进行了研究。DSC结果表明:随着共混物在螺杆中停留时间的增加,冷结晶温度增加而熔融结晶温度和熔点下降,结晶行为的差异可能与嵌段的序列长度随酯交换进行而不断减小有关。 WAXD及SEM的分析还表明:PET /PBT体系在无定形区是相容的,在晶区却是晶相分离的,而非共晶结构。并在实验基础上,对PET/PBT共混体系的可纺性进行了初步探讨。     

PET／PBT共混效应研究

应用X光衍射,DSC、红外光谱等测试方法对不同配比的PET/PBT共混物的共混效应进行探讨,从相容性能、结晶性、形态和成核机理等方面找到了一些规律,认为PET纤维通过PBT共混后能使其性能得到明显的改善,而PBT纤维通过PET或改性PET共混既可改善其性能,又可降低成本。     

PET/PBT嵌段共聚酯的纤维制备及性能研究

本文主要报导对PET/PBT嵌段共聚酯的纤维制备及性能研究,并介绍自行设计的纤维弯曲回弹性测试方法.试验表明,用80升釜扩大试验制得的批量共聚酯切片,能进行正常的纺丝和拉伸,以此制得的共聚纤维其拉伸和弯曲回弹性优于常规PET纤维和PBT纤维,染色性能接近常规PBT纤维.     

PBT/PET双组分体系熔体流变性能的研究——第1报 并列复合熔体流变性能的研究

对PBT/PET双组分体系(复合和共混)熔体进行流变性能和形态结构研究,取得一系列规律,对正确地制定双组分纤维纺丝成形的工艺条件,合理地控制生产工艺参数与改进产品性能具有一定的实际指导意义和理论价值。     

PBT/PET共混切片结晶性质的研究

本研究采用JJY-Ⅰ型光学检偏振仪测试不同配比PBT/PET共混切片的等温结晶性质,用电子计算机处理数据,获得了PBT/PET共混切片的等温结晶动力学参数。并采用准等温处理方法,将等温结晶动力学参数用于非等温过程中,得到不同配比PBT/PET共混切片一系列结晶动力学特性参数。从其中的动力学结晶能力G,可判断在同一稳态纺丝条件下,不同配比PBT/PET卷绕丝的相对结晶度大小;采用PEDSC-Ⅱ型测试了不同共混配比的PBT/PET切片的非等温结晶性质,其结果和用JJY-Ⅰ型测试结果一致;本研究还探讨了添加剂(成核剂)对PBT/PET共混切片结晶性质的影响。     

CDP/PET,PBT/PET复合纤维的开发与应用

本文综述了CDP/PET,PBT/PET复合纤维,CDP/PET共纺丝的国内外开发现状、产品性能及用途。指出CDP/PET复合纤维硬其共纺丝和PBT/PET复合纤维是具有较好经济效益与发展前途的产品,并建议扩大CDP切片的产量。提高自给能力,深入开发下游产品为消费者服务。     

PBT及其衍生纤维的开发和应用

本文介绍了PBT/PET共混纤维的性能。在DSC测试中发现,该共混纤维的两组分在晶区是不相容的,而在无定形区两组有是相容的;共混纤维克服了PBT纤维的自伸长现象,改善了卷装成型及两组分性能的加和性,使共混纤维的最大拉伸比及初始模量提高了,并改善了染色性和手感。接着介绍了PBT/PET复合纤维无需变形加工,可制得具有自卷曲的高伸缩性及两组分纤维性能的加和性,手感柔软、染色性能优良的纤维。最后介绍嵌段共聚PBT纤维性能,及其生产公用工程消耗低、经济性好以及弹性可调性等优点。另外,还介绍了共混、复合及嵌段PBT纤维国内外发展情况及其在仿真丝、弹性织物及弹力缝纫线等应用情况。     

PA6/PET共混熔体流变性能和成丝过程的研究

本文对PA6/PET共混物的流变性能及其对可纺性的影响进行了研究。结果表明:共混熔体的非牛顿指数减小,弹性明显增大,因此,PA6与PET共混后可纺性下降。经再造粒虽对其可纺性有所改善,但成丝的性能变差。纺丝时在纺程上部必须设保温缓冷段才能纺丝。拉伸工艺对纤维的结构和性能影响很大。随PET含量的提高,共混纤维的强度下降,抗张模量增大。     

Rheological behavior of polyester blend and mechanical properties of the polypropylene–polyester blend fibers

The article deals with method of preparation, rheological properties, phase structure, and morphology of binary blend of poly(ethylene terephthalate) (PET)/poly(butylene terephthalate) (PBT) and ternary blends of polypropylene (PP)/(PET/PBT). The ternary blend of PET/PBT (PES) containing 30 wt % of PP is used as a final polymer additive (FPA) for blending with PP and subsequent spinning. In addition commercial montane (polyester) wax Licowax E (LiE) was used as a compatibilizer for spinning process enhancement. The PP/PES blend fibers containing 8 wt % of polyester as dispersed phase were prepared in a two‐step procedure: preparation of FPA using laboratory twin‐screw extruder and spinning of the PP/PES blend fibers after blending PP and FPA, using a laboratory spinning equipment. DSC analysis was used for investigation of the phase structure of the PES components and selected blends. Finally, the mechanical properties of the blend fibers were analyzed. It has been found that viscosity of the PET/PBT blends is strongly influenced by the presence of the major component. In addition, the major component suppresses crystallinity of the minor component phase up to a concentration of 30 wt %. PBT as major component in dispersed PES phase increases viscosity of the PET/PBT blend melts and increases the tensile strength of the PP/PES blend fibers. The impact of the compatibilizer on the uniformity of phase dispersion of PP/PES blend fibers was demonstrated. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 4222–4227, 2006     

Effect of Blend Ratio and Draw Ratio on the Mechanical Properties of PET/PP Blended Conjugate Fibers

This study analyzes the influence of blend ratio and draw ratio on the fiber properties of blend fibers composed of poly (ethylene terephthalate), or PET, and polypropylene, or PP, (hereafter referred to as PET/PP conjugate fibers). For a comparison, PET and poly (butylene terephthalate), or PBT blends, (hereafter referred to as PET/PBT conjugate fibers) are also investigated. Various blend ratios of fibers are melt spun and drawn in a multistep drawing method. The conjugate fibers are evaluated using tenacity, Young's modulus, wide-angle X-ray diffraction, differential scanning calorimetry (DSC), and scanning electron microscopy (SEM) tests. The results show that multistep drawing using a lower first-step draw ratio provides a higher tenacity and Young's modulus. Furthermore, when the blend ratio is 75/25 in a PET/PP conjugate fiber and 50/50 in a PET/PBT conjugate fiber, the polymer components undergo a phase inversion phenomenon. A PP sub-micron (10^?1 ～ 10⁰ micron) fiber of about 0.0001 ～ 0.00017 tex in fineness, or about 0.4 ～ 0.5 micron in diameter, can be obtained when PET/PP conjugate fiber is treated with a 25% NaOH aqueous solution by weight. However, A PBT sub-micron fiber cannot be achieved using a PET/PBT conjugate fiber.     

PBT(聚对苯二甲酸丁二酯)共混纤维的结构与性能(Ⅱ)染色性能的研究

本文应用酸性染料对PBT与PA6(聚已内酰胺)共混熔纺所得拉伸丝进行常压染色;应用分散染料对PBT与PET(聚对苯二甲酸乙二酯)共混熔纺所得拉伸丝进行高温高压染色;并与纯组分的染色行为分别进行了比较,发现PBT/PET共混纤维中一种组分的存在有利于另一组分的染色,且存在着以最终上染率为目标的组分、染色温度与升温速率最佳组合值。PBT/PA6中PBT组分的存在,影响了PA6的着色;当PBT含量较少时(10％以下),这种影响作用不大。     

PBT(聚对苯二甲酸丁二酯)共混纤维的结构与性能——(Ⅰ)微观结构及力学性能的研究

本文应用SEM、S—S曲线、DSC、WAXS以及密度梯度等测试技术,对PBT(聚对苯二甲酸丁二酯)、分别与PET(聚对苯二甲酸乙二酯)、PP(聚丙烯)和PA6(聚己内酰胺)共混熔纺成纤后的微观形态和力学性能进行了测试和分析。SEM研究表明,PBT/PET=50/50和PBT/PA6=10/90时,其各自的PET相和PBT相就已分别在PBT基体和PA6基体中形成了原纤结构。PBT/PET共混物在整个共混组分比例范围内具有好的相容性;PBT/PA6属部分相容体系;PBT/PP属不相容体系。对于获得综合物性指标均有所改善的PBT/PA6共混纤维,PBT/PA6=10/90是一比较合适的量。     

PBT/PET conjugated fibers: Melt spinning,fiber properties,and thermal bonding

This work examines the PBT/PET sheath/core conjugated fiber, with reference to melt spinning, fiber properties and thermal bonding. Regarding the rheological behaviors in the conjugated spinning, PET and PBT show the smallest difference between their melt‐viscosity at temperatures of 290°C and 260°C respectively, which has been thought to represent optimal spinning conditions. The effect of processing parameters on the crystallinity of core material‐PET was observed and listed. In order of importance, these factors are the draw ratio, the heat‐set temperature, and the drawing temperature. The crystallinity of sheath material‐PBT, however, can be considered to be constant, independent of any processing parameters. The bulk orientation, rather than the crystallinity of PET core, dominates the tenacity of PBT/PET sheath/core fiber. Moreover, heat‐set treatment after drawing is recommended to yield a highly oriented conjugated fiber. With respect to thermal bonding, PBT/PET conjugated fibers processed via high draw ratio but low‐temperature heat setting can form optimal thermal bonds at a constant bonding temperature of 10°C above the T_m of PBT.     

PET/PTT共混纤维的制备及结构性能研究

将聚对苯二甲酸乙二酯(PET)与聚对苯二甲酸丙二醇酯(PTT)共混纺丝制备PET/PTT共混纤维,研究了共混纤维的结构与性能。结果表明,随着PTT含量的增加,PET/PTT共混纤维的晶粒尺寸逐渐增大;PET/PTT共混纤维的断裂强度较PTT纤维大,回弹性较PET纤维好,沸水收缩率较PET纤维大;当PTT质量分数为50%时,共混纤维的结晶度出现最小值,沸水收缩率出现最大值。     

PBT/PEG/LA可降解聚醚酯的合成及纺丝研究

采用对苯二甲酸二甲酯(DNT)、1,4-丁二醇(BDO)、聚乙二醇(PEG)和乳酸(LA)合成了聚对苯二甲酸丁二醇酯(PBT)/PEG/LA可降解聚醚酯,通过纺丝制备了PBT/PEG/LA共聚物纤维。结果表明:红外光谱和核磁共振分析所得聚合物为PBT/PEG/LA。PBT/PEG/LA共聚物在50℃真空预干燥5 h,80℃干燥5 h,控制纺丝温度高于聚醚酯熔点15～30℃可顺利纺丝,纤维质量良好。随着拉伸倍数、热定型温度或时间的增加,纤维的断裂强度提高.断裂伸长率下降。LA摩尔分数高,有利于纤维降解,但纤维熔点和断裂强度相应下降。     

PET/EVA共混纤维的制备及其性能研究

将PET/EVA共混物切片在微型柱塞式纺丝机上进行熔融纺丝、拉伸等试验,对其纤维的结构和性能进行了分析。结果表明,随着EVA含量的增加,共混切片的纺丝性能下降;初生共混纤维的密度、机械性能、可拉伸性能下降;共混纤维的取向度、结晶度降低。