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聚合物共混改性是制备功能材料最常用的方法,而对于纤维纺丝成形而言,直接共混和母粒添加共混的差异性未见有报道。以尼龙6为原材料,聚酯类添加剂为功能性共混物,分别研究了直接共混和母粒添加共混对纤维成形,共混纤维的物性的比较,结果发现,共混母粒纺丝成形所得共混纤维的机械性能优于直接共混纺丝成形共混纤维,且后处理效果优于直接共混纺丝成形,在添加的改性剂质量分数达30%以上时,后处理共混纤维的表面存在一定微细纤维结构,共混母粒纺丝成形所得共混纤维处理后纤维表面的微细纤维结构更为细小和均匀。 相似文献
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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。 相似文献
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羊毛粉/PP共混纺丝和复合纺丝纤维的研究 总被引:1,自引:0,他引:1
采用高压空气粉碎羊毛制得的羊毛粉,与聚丙烯(PP)熔融共混纺丝和皮芯型复合纺丝,分别制得羊毛粉/PP共混纤维和复合纤维。对比分析了羊毛粉/PP共混纤维、复合纤维及纯PP纤维的结构和性能。结果表明:羊毛粉/PP共混纤维的断裂强度、初始模量高于复合纤维及纯PP纤维,其大小顺序依次为共混纤维、纯PP纤维、复合纤维;羊毛粉/PP共混纤维的表面染色深度(K/S值)高于复合纤维及PP纤维,其大小顺序依次为共混纤维、复合纤维、纯PP纤维;羊毛粉/PP共混纤维和复合纤维的回潮率均高于纯PP纤维,其大小顺序依次为复合纤维、共混纤维、纯PP纤维。 相似文献
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香味聚丙烯纤维的研制 总被引:2,自引:0,他引:2
研究了香味聚丙烯纤维的成形,并对添加香料的热性能,香料对聚丙烯流动性能的影响,以及香味聚丙烯纤维的纺丝进行了探讨。结果表明,复合香料加入聚丙烯后热分解速率降低,并增加了聚丙烯熔体的流动性能,在较低纺丝温度下具有较好的可纺性,纤维的力学性能比未加香料的聚丙烯纤维有所降低。 相似文献
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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。 相似文献
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The spinnability and mechanical properties of poly(propylene) (PP)/zeolite‐supported Ag+ (zeolite‐Ag)/ethylene vinyl acetate (EVA) ternary blend fibers were studied. It was found that the spinning temperature of the ternary blend fibers was decreased in the presence of EVA. The addition of 2 wt % EVA substantially improved the spinnability of the blend system by enhancing its flowability. It was also found that the ternary fiber with EVA28 (28 wt % vinyl acetate content) showed balanced improvement of mechanical properties by a concomitant increase in modulus and tensile strength. The improvements of spinnability and mechanical properties suggested that a core–shell structure of zeolite‐Ag/EVA28 particles, with zeolite‐Ag as the core and EVA28 as the shell, was formed and remained during the melt‐mixing process of the blended chips and during the course of fiber processing. EVA probably enhanced the binding between the zeolite‐Ag and the PP matrix, as made evident in SEM microphotographs. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 1460–1466, 2005 相似文献
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聚丙烯与聚酯类高聚物共混纤维碱处理前后结构与性能 总被引:3,自引:2,他引:1
研究了聚丙烯(PP)加入一定量的无机盐或与含无机盐的聚酯(PET),阳离子可染聚酯(CDP),水溶性聚酯(WSPET)共混纺丝的可纺性,讨论了不同碱处理时间及加入相容剂与否对纤维碱减率、形态结构及力学性能的影响。其结果表明:在PP中加入一定量的无机盐或与含无机盐的PET类高聚物共混纺丝,可纺性较好,经碱处理后,纤维中可形成微孔,随碱处理时间延长,碱减率增加,断裂强度下降;加入相容剂后,碱减率下降,微孔细密,力学性能提高。 相似文献
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以聚乙酸乙烯酯(PVAc)为增容剂,采用熔融共混和熔融纺丝的方法制备了聚乳酸(PLA)/聚酰胺弹性体(PAE)/PVAc共混切片和共混纤维,研究了增容剂的加入对共混切片相容性的影响和共混纤维増韧改性效果的影响。结果表明,加入PVAc后,分散相粒子尺寸减小,两相界面模糊,相容性提高。随着PAE弹性体含量增加,初生纤维中PLA的结晶度提高;二级牵伸共混纤维在PAE含量为10%时,综合力学性能最优,断裂强度、模量、断裂伸长率和断裂功分别达412.7 MPa、6 345.4 MPa、22.3%和127.4 mJ,共混纤维的可纺性显著提高。 相似文献
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研究了聚丙烯/皂化乙烯-乙酸乙烯共聚物/马来酸酐接枝聚丙烯(PP/EVAL/PP-g-MAH)动态硫化体系的力学性能、相形态、结晶性能和动态机械性能。结果表明:PP-g-MAH能显著改善PP/EVAL动态硫化体系的力学性能和熔体流动速率(MFR)。当PP/EVAL/PP-g-MAH质量比为80/20/8时,材料的冲击强度较不加PP-g-MAH时提高了179.6%,达到74.1 kJ/m2,MFR为13.4 g/10min。PP-g-MAH能有效改善分散相的分散效果和两相相容性,并同时促进PP/EVAL动态硫化体系中PP的α晶和β晶的形成。PP-g-MAH的加入使PP/EVAL动态硫化体系中PP组分的Tg向低温方向移动。 相似文献
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Processing‐related properties of a polypropylene (PP)/silicone oil blend were investigated. It was found that an addition of a small amount (~2 wt%) of silicone oil, a low molecular weight linear poly(dimethyl siloxane) (PDMS), drastically changed the rheological properties of PP. The PDMS seemed to work both as an internal lubricant and an external lubricant in the blend system. In particular, the apparent viscosity of the blend in capillary rheometry was approximately 10 times lower than that of virgin PP. The local minima in the viscosity versus shear rate curve in capillary rheometry and the gap‐dependency of viscosity in parallel‐plate rheometry implied the existence of a slip wall condition, caused by the formation of a thin lubricant layer at die walls. Thermal analyses and mechanical tests showed that the thermal and mechanical properties of the blend were nearly unaffected by the minor addition of silicone oil. The blend was tested in a profile extrusion process, and a significant reduction in die swell and profile distortion was achieved. The jet stretchability or spinnability in fiber spinning was also greatly improved with the minor addition of silicone oil. POLYM. ENG. SCI., 2010. © 2010 Society of Plastics Engineers 相似文献
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优选出有机分子组装型(KJY-1)和无机银系(KJW-1)抗菌剂,与PP切片共混纺丝,在低速、大喷丝 板、一步法设备上生产抗菌丙纶。适当调整纺丝工艺,纺丝性能良好,抗菌丙纶的物理指标与常规丙纶无异。 KJY-1抗菌剂添加0.8%时,纤维抗菌率达99%,经50次洗涤抗菌率仍达90%以上。KJW-1型抗菌剂添加 1%时,纤维抗菌率达93%。 相似文献
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聚丙烯/分子筛共混纤维的结构与性能 总被引:1,自引:0,他引:1
用钛酸酯偶联剂对分子筛进行表面处理,按一定比例与聚丙烯(PP)切片共混纺丝,制得PP/分子筛共混纤维,研究PP/分子筛共混纤维的结构与性能。结果表明:当纤维中分子筛的质量分数为1%时,PP/分子筛共混纺丝纤维的可纺性好,断裂强度比纯PP纤维提高31.85%,上染率提高44.86%,初始模量、断裂功、回潮率均有所提高;与纯PP纤维相比,PP/分子筛共混纤维的结晶度略小、晶粒变大,取向度降低,纤维的染色性、吸湿性得到改善。分子筛与偶联剂发生化学反应,有利于分子筛和PP的结合,适当的分子筛含量时,纤维的力学性能有所提高。 相似文献