超高分子量聚乙烯纤维的性能与应用

超高分子量聚乙烯纤维是世界三大高性能纤维之一,因为它的化学性能和物理机械性能极具优势,在很多领域广泛使用,比如:军事上、工业上、航海上、航空航天上等。同时超高分子量聚乙烯纤维是我国要重点发展的高科技项目,也是我国极力发展的特种纤维之一。本文综合阐述了什么是超高分子量聚乙烯纤维,超高分子量聚乙烯纤维的发展历程、性能和应用,并且对它的发展前景进行了预估。     

专利文摘

正一种改性超高分子量聚乙烯纤维混纺制备方法本发明公开了一种改性超高分子量聚乙烯纤维混纺制备方法。其制备步骤为:步骤一,改性超高分子量聚乙烯的制备;A.先将超高分子量聚乙烯研磨成粉加入到反应釜中,然后向反应釜中加入十氢萘溶剂并对其进行加热溶解,制得超高分子量聚乙烯溶液;B.然后向反应釜中加入PTFE乳液、硅烷偶联剂、石墨和助剂,制得改性超高分     

超高分子量聚乙烯纤维的技术与市场发展

本文简要介绍了世界高性能纤维主要品种——超高分子量聚乙烯纤维的基本性能和主要应用领域,重点归纳了十几年来国内外相关企业的生产、技术和行业发展状况,综合分析了国内外超高分子量聚乙烯纤维及其复合材料市场的供需趋势,指出了该种纤维行业具有良好的产业发展优势与前景。     

一种特高强超高分子量聚乙烯纤维的制备方法

正本发明提供一种特高强超高分子量聚乙烯纤维的制备方法,采用线性低密度聚乙烯与超高分子量聚乙烯和溶剂共混制备超高分子量聚乙烯纤维,并通超倍拉伸形成高强纤维。将500万～1 000万超高分子量聚乙烯的低溶度溶胀混合物与线性低密度聚乙烯按比例在纺丝溶剂中混合,通过提高超高分子量聚乙烯的分子链长度和添加线性低密度聚乙烯降低纺丝液的黏度,降低螺杆的温度减     

超高分子量聚乙烯纤维产业现状与市场前景

超高分子量聚乙烯纤维是支撑世界高新技术产业的重要新材料之一,也是我国"十五"规划重点发展的高科技项目和国家鼓励发展的特种纤维品种之一,因其分子量极高,主链结合好,取向度和结晶度高,强度为当今所有新型化纤材料之最,在高级轻质复合材料中显示出极大的优势,广泛应用于国防军工、安全防护、航空航天、航海、兵器、造船等诸多领域,成为目前发展最快的高性能纤维。本文介绍超高分子量聚乙烯纤维的物化性能、制造工艺、产业现状、应用领域、市场前景等方面的一些情况,并对今后国内超高分子量聚乙烯纤维产业的发展提出了建议。     

超高分子量聚乙烯纤维缆绳替代传统浮标锚链的初探

超高分子量聚乙烯纤维是一种新型高性能纤维,由其制作成的缆绳耐磨损、抗冲击、抗耐腐蚀、不易被海洋生物附着。本文将某品牌超高分子量聚乙烯纤维缆绳与传统锚链进行对比,得出其优势,论证超高分子量聚乙烯纤维缆绳在代替传统浮标锚链的可行性,指出了存在的问题,并提出了对未来的展望。     

改善超高分子量聚乙烯纤维粘合性能的研究

本文旨在分析、探讨超高分子量聚乙烯纤维表面处理的各种方法，如等离子体法、化学试剂氧化法等。通过其表面处理，纤维表面或粗糙度有了提高或携带了极性基团，从而使超高分子量聚乙烯纤维与基体粘合性能得以改善。尤为关注近几年来对超高分子量聚乙烯纤维的改性新动态.     

细旦高强聚乙烯纤维加工过程研究

通过对不同生产厂家的超高分子量聚乙烯(UHMWPE)树脂的黏均分子量、结晶度、溶胀后料液的流变特性等物化性质进行对比和分析,采用凝胶纺丝-超高倍拉伸技术对UHMWPE树脂进行纺丝,制备了细旦高强超高分子量聚乙烯纤维,对纤维的结晶度、纤度及力学特性进行了测试分析。结果表明,UHMWPE树脂的结晶度、颗粒大小等物理特性对制备的成品纤维的性能有较大的影响,树脂的黏均分子量与其结晶度不成正相关,而与其制备的成品聚乙烯纤维的结晶度成正相关,且结晶度越高制备的纤维性能更优异;黏均分子量大、原料液较优的流变特性均有利于双螺杆的加工,其成品纤维的强度、模量均较高,黏均分子量大、粒径分布窄,更有利于制备细旦高强超高分子量聚乙烯纤维,同时,超倍机械热牵伸是目前提高超高分子量聚乙烯纤维力学性能较有效的方法。     

无锡大力发展特种纤维产业

北京同益中特种纤维技术开发有限公司是以超高分子量的聚乙烯为原料,生产超高分子量聚乙烯纤维的专业厂家。为满足市场对高强聚乙烯纤维的需求,北京同益中特种纤维技术开发有限公司无锡分公司抓住机遇,大力发展特种纤维产业,同时藉此     

超高分子量聚乙烯的特性及应用进展

超高分子量聚乙烯性能卓越、加工困难,是一种正在迅速崛起的工程性热塑性塑料。由于加工困难．国内外超高分子量聚乙烯的应用多集中在压制产品上,但是材料学家们从来没有停止过对超高分子量聚乙烯挤出制品的探讨。超高分子量聚乙烯的卓越性能源自于它具有极高的分子量,因此对超高分子量聚乙烯改性成功与否的判定在很大程度上取决于其制品的分子量保留的程度和在低温下的冲击韧性。作者利用新的挤出理念,精确的配方和精湛的工艺成功的挤出了分子量在250万以上的超高分子量聚乙烯管材制品,并对超高分子量聚乙烯的纤维、膜制品的应用进行了概要的介绍。     

UHMW PE/PP共混改性体系研究(Ⅱ)

制备了UHMW PE/PP合金材料,研究了UHMW PE/PP共混体系的流动性和力学性能及相容剂对共混体系的增容作用,研究表明:PP能有效地改善UHMW PE流动性,但与UHMW PE为不相容体系,相容剂D能够有效提高UHMW PE/PP体系的相容性,提高了材料的拉伸强度和冲击强度,达到一定的增强和增韧效果。     

超高分子量聚乙烯耐热性改性研究进展

综述了近年来对超高分子量聚乙烯(PE–UHMW)的耐热性改性研究进展,介绍了物理改性(与无机物、有机物、纳米材料共混)、化学改性(过氧化物、偶联剂、辐射交联改性)和聚合填充复合改性在PE–UHMW的耐热性改性方面的应用,讨论了不同PE–UHMW的耐热性改性方法的改性效果及改性机理,并对PE–UHMW的耐热性改性的发展趋势做了展望。     

Mechanical properties of polyethylene mixtures crystallized under high pressure

The mechanical properties of a medium molecular weight polyethylene (MMW‐PE) and an ultrahigh molecular weight PE (UHMW‐PE) binary mixture with different weight fractions crystallized from the melt at 0.1 and 450 MPa were studied. The tensile modulus, yield stress, and strain were obtained as a function of the weight fractions in the PE mixtures at 25 and 85°C. The tensile modulus in the sample crystallized at 0.1 MPa decreased from 1.5 GPa of pure MMW‐PE to about 0.4 GPa of pure UHMW‐PE with the UHMW‐PE content but it did not decrease with the UHMW‐PE in the sample crystallized at 450 MPa in testing at 25°C. A decreasing rate of the storage modulus E′ of UHMW‐PE in a dynamic measurement for the sample crystallized at 0.1 MPa with the temperature is larger than that of the sample crystallized at 450 MPa. These experimental facts are interpreted in relation to the molecular motion and crystallinity of the sample. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 87: 1962–1968, 2003     

Effect of high-energy radiation on the uniaxial tensile creep behaviour of ultra-high molecular weight linear polyethylene

The tensile creep (and other tensile) properties of ultra-high molecular weight polyethylene (UHMW PE) have been determined before and after electron beam irradiation and compared with similar results on normal molecular weight high-density polyethylene (NMW PE). In both polymers, irradiation increases the tensile modulus and the yield stress whilst reducing creep. The major effects occur over the first 20 MRad irradiation dose, though creep strain continues to diminish with dose in UHMW PE up to 64 MRad. Most of the effects can be attributed to crosslinking in the amorphous phase, though the rise in yield stress seems to require crosslinking in the crystalline phase, and the initial rise in modulus in UHMW PE seems to reflect a rise in crystallinity. Comparison with other polymers shows that the creep behaviour of UHMW PE remains relatively poor, even after irradiation. The improvements obtained may, however, be significant in applications where creep resistance is of secondary importance compared with, say, impact and wear resistance, in which UHMW PE excels.     

压力速度对PE-UHMW摩擦学性能影响的试验研究

通过对同一压力速度(PV)值下超高相对分子质量聚乙烯(PE UHMW)的摩擦学性能研究,探讨PE UHMW应用于电梯靴衬的影响因素。以PE UHMW和45#钢为摩擦副,在MMW 1A摩擦磨损试验机上测量摩擦副在微量油工况和同一PV值下的摩擦因数和工作温度,并计算PE UHMW磨损量。结果表明,在微量油润滑下,随着试验时间的延长,PE UHMW的摩擦因数和工作温度分别经历了先降低后平缓和先急剧上升后平缓增加的变化,但在整个过程中PE UHMW没有磨损;在同一PV值下,摩擦因数和工作温度均经历了波动式变化;随压力的增加,摩擦因数和工作温度的波动程度依次经历了较小、剧烈和平缓的变化。     

Effect of zone drawing accompanied with crosslinking on the structure and properties of ultrahigh molecular weight polyethylene gel film

To enhance the thermal properties of ultrahigh molecular weight (UHMW) (viscosity-average molecular weight of 6 × 10⁶) polyethylene (PE) gel film, this was crosslinked by dicumyl peroxide (DCP) during a high-temperature zone drawing, which is effective to orient film. Through a series of experiments, it turned out that crosslinking actualized by an optimum amount of DCP and high-temperature zone drawing technique caused significant changes in the structure and properties of UHMW PE gel film. That is, crosslinking increased storage modulus of UHMW PE gel film at 25°C, resulting in improving thermal properties of the film. On the contrary, the crosslinking effect played a hindering role in raising the draw ratio of UHMW PE gel film. Maximum storage modulus of 165 GPa at 25°C could be obtained at the draw ratio of 324 of uncrosslinked homo-PE gel film. In the case of crosslinked PE gel film, the highest storage modulus at 25°C reached 65 GPa at maximum draw ratio of 150. Crosslinked film exhibited high modulus, even at 190°C, to some extent, while uncrosslinked homo-PE gel film was molten completely at 150°C. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 1583–1590, 1997     

Nano⁃SiO2及PA6复合改性PE⁃UHMW的摩擦磨损性能研究

采用电子万能试验机、M-2000型摩擦试验机、电子和光学显微镜等测试分析方法,重点考察了纳米二氧化硅(nano-SiO2)及其与聚酰胺6(PA6)复合对超高分子量聚乙烯(PE-UHMW)摩擦磨损性能的影响.结果表明,随着nano-SiO2用量的增加,PE-UHMW复合材料的摩擦因数和磨损率均呈现出先降低后升高的趋势;当...     

干法工艺制备PE–UHMW纤维

采用干法纺丝工艺,以超高分子量聚乙烯(PE–UHMW)纤维专用树脂为原料,制备高性能PE–UHMW纤维,通过电子拉力机、扫描电子显微镜、差示扫描量热仪对不同后拉伸倍率的纤维进行力学性能和微观结构分析。结果表明,随着拉伸倍率的增加,纤维初生丝结晶度由49.57%逐渐提高至72.17%,拉伸倍率50倍以后,结晶度逐渐趋于平稳;随着拉伸倍率的增加,纤维的力学性能逐渐增强,在拉伸倍率达到83.3倍时,纤维的力学性能达到最佳,纤维断裂强度为31.53 c N/dtex,断裂伸长率为2.69%,断裂模量为1 054.78 c N/dtex;纤维微观表面结构也发生有规律的变化。     

Improvement of the mechanical properties of an ultrahigh molecular weight polyethylene fiber/epoxy composite by corona‐discharge treatment

The interfacial shear strength of an ultrahigh molecular weight (UHMW) polyethylene (PE) fiber/epoxy‐resin system was greatly improved by the corona‐discharge treatment of the fiber. The UHMW PE‐fiber/epoxy‐resin composite was prepared with corona‐discharge‐treated UHMW PE fiber. The mechanical properties of the composite sheet were determined by tensile testing. The tensile strength of the composite was also very much improved. However, the tensile strength of the composite was about one‐half of the theoretical strength. This result was due to the molecular degradation of the PE‐fiber surface caused by surface modification. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 79: 1162–1168, 2001     

结晶条件对超高分子量聚乙烯熔融再结晶行为的影响

应用常压差示扫描量热(DSC)仪和高压DSC仪研究了熔融温度、熔融时间、冷却速率以及压力对不同分子量的超高分子量聚乙烯(PE–UHMW)熔融再结晶行为的影响。常压DSC的研究表明,随着熔融温度、熔融时间以及冷却速率的增加,PE–UHMW的结晶峰值温度(Tc)逐渐下降。在相同的熔融温度和熔融时间下,PE–UHMW的Tc随分子量的增加而逐渐增加,但在所研究的冷却速率范围内(2.5～40℃／min),在相同的冷却速率下,Tc随分子量的增加变化不大。高压DSC的研究结果表明,结晶过程中增加压力导致PE–UHMW的Tc有所下降,并且结晶峰半峰宽变大。