聚萘二甲酸乙二酯的性能与应用

聚萘二甲酸乙二酯(PEN)是聚酯类产品中的新品种。介绍了聚萘二甲酸乙二酯(PEN)的发展、性能及作为高性能的高分子材料在薄膜、纤维、特种包装材料和工程树脂方面的应用现状。     

PEN的合成、改性及应用研究进展

介绍了聚萘二甲酸乙二醇(酯PEN)的合成方法,包括直接酯化法和酯交换法;阐述了利用聚对苯二甲酸乙二醇酯(PET)、聚对苯二甲酸丁二醇酯(PBT)和聚对苯二甲酸丙二醇酯(PTT)共混改性PEN的方法;探讨了PEN在薄膜中、空制品纤、维等领域的应用;展望了PEN的发展方向。     

2,6-萘二甲酸二甲酯合成技术的研究进展与展望

2,6-萘二甲酸二甲酯(DM-2,6-NDC)是一种重要的中间体,是合成功能聚合物聚萘二甲酸乙二醇酯(PEN)的重要原料,对于其合成技术的研究一直是国内外的研究热点。本文综述了2,6-萘二甲酸(2,6-NDC)的合成方法及2,6-萘二甲酸酯化制备2,6-萘二甲酸二甲酯的研究现状及存在的问题,并对2,6-萘二甲酸二甲酯的发展前景进行了展望。笔者认为,以煤化工副产物煤焦油为原料合成2,6-萘二甲酸二甲酯以及新材料PEN,是国内煤化工企业的一条重要出路。     

PET/PEN/NCL纳米啤酒瓶的研制

用对苯二甲酸二甲酯、2,6-萘二甲酸二甲酯两种单体与乙二醇进行酯交换反应制备了(对苯二甲酸乙二N／2,6-萘二甲酸乙二酯)共聚物(PET／PEN),讨论了纳米累托石(NCL)和PEN不同含量对PET／PEN／NCL纳米复合材料性能的影响。结果表明,PET／PEN／NCL纳米复合材料的合成工艺与普通PET的合成工艺相近;当PEN质量分数为6％、NCL质量分数为3％时制得的PET／PEN／NCL纳米啤酒瓶可耐105℃高温,对O2、CO2的阻隔性比PET瓶提高5—6倍。     

聚萘二甲酸乙二醇酯的开发与应用

介绍了聚萘二甲酸乙二醇酯 (PEN)的性能、制造方法及其PEN制品的特性与用途 ,并与PET树脂进行了比较 ,展示了PEN良好的应用前景     

啤酒瓶用共缩聚PET/PEN的研究

采用对苯二甲酸二甲酯(DMT)与2，6-萘二甲酸二甲酯(DMN)合成了聚对苯二甲酸二乙酯(PET)和聚2，6-萘二甲酸二乙酯(PEN)共缩聚物，研究了PEN用量对共缩聚PET／PEN热性能的影响，并研究了采用PET／PEN制成的啤酒瓶的物理性能、气体阻隔性能和贮藏性。结果表明：PET／PEN的性能与普通聚酯切片的相近，PEN质量分数为30％的PET／PEN制成的啤酒瓶可耐95℃高温，对O2、CO2气体的阻隔性比普通PET瓶提高6倍。     

聚萘二甲酸乙二醇酯产业链发展现状及趋势

综述了聚萘二甲酸乙二醇酯(PEN)原料2,6-二甲基萘(2,6-DMN)、2,6-萘二甲酸(2,6-NDA)、2,6-萘二甲酸二甲酯(2,6-NDC)和PEN的合成技术,以及PEN应用现状。2,6-DMN的主要合成方法是化学合成法,但存在成本过高等问题。2,6-NDA的主要合成方法是2,6-DMN氧化法,但产品杂质较多,需通过复杂的工艺进行提纯。2,6-NDC的合成方法主要包括邻二甲苯法、β-甲基萘氧化法和2,6-二异丙基萘氧化法,目前均已实现工业化生产,但生产成本较高。PEN合成技术包括直接酯化法和酯交换法,酯交换法是目前PEN工业化生产的唯一方法。PEN主要应用在特种薄膜、高端中空容器、高性能纤维及共聚改性材料等领域。我国PEN产业链的发展亟待突破2,6-DMN单体分离和提纯的瓶颈,降低原料成本,实现产业化生产。     

PEN聚酯工艺的研究进展

介绍了聚萘二甲酸乙二醇酯(PEN)聚酯的性能和用途，详细概括了合成PEN聚酯的各种工艺路线研究进展情况。     

新型聚酯PEN的开发概况及发展前景

简述了聚萘二甲酸乙二醇酯(PEN)的性能及其工艺原理,综述了国内外有关新型聚酯材料PEN的研究概况和开发现状,并指出其应用领域及其发展前景。     

聚萘二甲酸乙二醇酯(PEN)特性粘数的测定

研究了聚萘二甲酸乙二醇酯(PEN)的特性粘数测定方法,并提出了计算公式。不仅适用于PEN特性粘数的测定,而且适合于PEN/PET共聚物的特性粘数测定。     

Morphology and barrier mechanism of biaxially oriented poly(ethylene terephthalate)/poly(ethylene 2,6‐naphthalate) blends

To improve the barrier properties of poly(ethylene terephthalate) (PET), PET/poly(ethylene 2,6‐naphthalate) (PEN) blends with different concentrations of PEN were prepared and were then processed into biaxially oriented PET/PEN films. The air permeability of bioriented films of pure PET, pure PEN, and PET/PEN blends were tested by the differential pressure method. The morphology of the blends was studied by scanning electron microscopy (SEM) observation of the impact fracture surfaces of extruded PET/PEN samples, and the morphology of the films was also investigated by SEM. The results of the study indicated that PEN could effectively improve the barrier properties of PET, and the barrier properties of the PET/PEN blends improved with increasing PEN concentration. When the PEN concentration was equal to or less than 30%, as in this study, the PET/PEN blends were phase‐separated; that is, PET formed the continuous phase, whereas PEN formed a dispersed phase of particles, and the interface was firmly integrated because of transesterification. After the PET/PEN blends were bioriented, the PET matrix contained a PEN microstructure consisting of parallel and extended, separate layers. This multilayer microstructure was characterized by microcontinuity, which resulted in improved barrier properties because air permeation was delayed as the air had to detour around the PEN layer structure. At a constant PEN concentration, the more extended the PEN layers were, the better the barrier properties were of the PET/PEN blends. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 1309–1316, 2006     

Synthesis of phenolphthalein/bisphenol A-based poly(arylene ether nitrile) copolymers: Preparation and properties of films

Poly(arylene ether nitrile) (PEN) is a class of high-performance engineering plastics of poly(arylene ether) with cyano groups as side groups, which can get improved thermal, mechanical, and electrical properties through simple molecular structure design. In this work, a series of PEN (BPA/PP based PEN) copolymers were synthesized with varying amounts of phenolphthalein and bisphenol A. The influence of the copolymer molecular structure variations on the thermal, mechanical, and dielectric properties of PEN copolymer films was investigated. The results demonstrated that the BPA/PP based PEN copolymer films have great mechanical properties and low dielectric constant, as well as enhanced thermal properties. The highest 5% weight loss temperature of 494.9°C was obtained by PEN-B7P3, while the highest glass transition temperature of 238.6°C was obtained by PEN-B3P7. Porous BPA/PP based PEN films prepared by non-solvent induced phase separation (NIPS) exhibited satisfactory mechanical properties and the highest tensile strength of 9.4 MPa was achieved. Moreover, the introduction of the phenolphthalein structure into the PEN molecular chain can improve the heat resistance of the PEN copolymers without deteriorating the dielectric properties, which gives the copolymers great potential as candidates for applications in flexible electronics and wireless communication.     

聚芳醚腈合金的制备及性能研究

将2类聚芳醚腈（PEN）共聚物PEN（HQ／RS）和PEN（HQ／PP）,按不同质量比通过熔融共混制备PEN合金材料,测试其相容性、力学性能和热性能,发现聚合物合金在PEN（HQ／RS）质量分数分别为20％和80％时相容性良好,PEN（HQ／RS）的加入改善了PEN（HQ／PP）的加工性能,实验中不同质量比的合金均具有优良的力学性能和热性能。     

聚苯硫醚对聚芳醚腈的增塑、增韧作用与性能研究

选用聚苯硫醚(PPS)作为聚芳醚腈(PEN)的增塑剂,通过熔融共混的方法制备了PEN/PPS合金,并研究了PPS对PEN的增塑、增韧作用及性能的影响.结果表明,PPS对PEN具有很好的增塑和增韧效果,当PPS质量分数为15%时,大幅提高了PEN的加工流动性和韧性;PEN/PPS合金的其它力学性能和耐热性能与PEN相当.     

Synergetic effect of cyanogen functionalized carbon nanotube and graphene on the mechanical and thermal properties of poly (arylene ether nitrile)

Cyanogen functionalized carbon nanotube and graphene/poly (arylene ether nitrile) (CNT-CN/GN-CN/PEN) nanocomposite films were prepared by a facile solution casting method. The weight ratio of CNT-CN/GN-CN was varied from CNT-dominated to GN-dominated for the purpose of investigating their synergetic effects on the mechanical and thermal properties of PEN nanocomposites. Consequently, GN-CN/PEN composites demonstrated better mechanical and thermal properties than CNT-CN/PEN composites due to larger contact area between GN-CN and PEN matrix. Nevertheless, all CNT-CN/GN-CN/PEN composites exhibit enhanced mechanical properties than those of GN-only nanocomposites. With the increasing of CNT-CN/GN-CN weight ratio, the mechanical properties of CNT-CN/GN-CN/PEN composites increase, then decrease, and reach their maximums when CNT-CN/GN-CN weight ratio is around 4/4. From scanning electron microscope images, it is found that around that point GN-CN is flatly dispersed and CNT-CN is penetrated into GN-CN, capable of transferring stress load and thus decreasing interface loss. Thermal properties of CNT-CN/GN-CN/PEN composites once again confirmed the joint effect of CNT-CN and GN-CN, leading to improved thermal properties. In short, a synergistic effect between one-dimensional (1-D) CNT and two-dimensional (2-D) GN on the mechanical and thermal properties of nanocomposites have been demonstrated in these systems.     

PEN及其中间体2,6-萘二甲酸简介

叙述了PEN及其中间体2,6-萘二甲酸的发展情况。介绍了PEN的一般特性,如具有较高的气体阻隔性,较好的耐热性,优良的力学性能,良好的光学性能,稳定的化学性能及其在瓶、薄膜方面的应用。指出制约PEN发展的关键因素是其中间体2,6-萘二甲酸的生产。并介绍了2,6-萘二甲酸的制备方法。     

成核剂对PET/PEN共混物性能影响及其机理研究

利用差示扫描量热法、X射线衍射和转矩流变测试等手段,研究了成核剂碳酸氢钠、苯甲酸钠和乙烯-甲基丙烯酸离子键聚合物(Surlyn)对聚对苯二甲酸乙二醇酯/聚萘二甲酸乙二醇酯（PET/PEN）共混物结晶性能和力学性能的影响。结果表明,3种成核剂均能显著提高共混物的成核作用,其中,Surlyn和苯甲酸钠能明显提高共混物结晶性能,结晶峰温度提高约20 ℃,结晶速度提升近1倍;3种成核剂中,只有Surlyn在提高结晶性能的同时,还能提高共混物的力学性能;Surlyn是PET/PEN共混物理想的成核剂。     

高速纺丝聚萘二甲酸乙二醇酯纤维的结构与性能

回顾了关于新型聚酯材料聚萘二甲酸乙二醇酯（ＰＥＮ）的研究成果,着重比较了不同制备条件下所得ＰＥＮ 纤维的结构与性能,并介绍了ＰＥＮ 与ＰＥＴ 熔融共混纤维的研究结果。     

PET-PEN共聚酯对PET/PEN共混物的增容作用及其机理

使用聚对苯二甲酸乙二酯(PET)-聚萘二甲酸乙二酯(PEN)无规共聚酯作增容剂,通过双螺杆挤出机熔融共混,制备了不同PET-PEN共聚酯用量的PET/PEN共混物,采用差示扫描量热分析、热重分析、热变形温度测试以及力学实验等方法,研究了该共混物的相容性及其它性能。结果表明,PET-PEN共聚酯对PET/PEN共混物具有明显的增容作用,能有效提高PET/PEN共混物的热稳定性,其用量越高,热稳定性提高越明显,当PET-PEN共聚酯用量为15质量份时,起始失重温度提高了20.3℃。PET-PEN共聚酯增容剂能提高PET/PEN共混物的维卡软化温度、拉伸和弯曲性能以及冲击性能,当PET-PEN共聚酯用量为5质量份时,增容改性的综合效果最好。     

Morphology,thermal and mechanical properties of glass fiber‐reinforced crosslinkable poly(arylene ether nitrile)

Crosslinkable poly(arylene ether nitrile)/glass fiber (PEN/GF) composites with high thermal stabilities and mechanical properties were prepared by a economically and environmentally viable method of melt extrusion and injection molding. The feasibility of using PEN/GF composites was investigated by evaluating its morphological, rheological, thermal, and mechanical properties. The morphology shows a good dispersion and strong interfacial interaction between PEN and GF. Thermal studies reveal that the thermal stabilities of PEN/GF are improved significantly with increase of GF content. Mechanical investigation manifested that GFs have strengthening effect (increase in flexural, tensile, and impact strength) on the mechanical performance of PEN composites. Most importantly, crosslinking reaction of PEN/GF composites can further improve their mechanical performances, because a couple of GFs are agglomerated by thermal motion and strong interfacial adhesion and the local agglomeration does not break the global uniform distribution. This work shows that both the enhancement of GF content and the crosslinking reaction of PEN/GF composites are two key factors influencing the thermal and mechanical properties. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013