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SYNTHESIS AND CHARACTERIZATION OF NANOSTRUCTURED-SEGMENTED BLOCK COPOLYETHERAMIDE BASED ON nylon6 AND POLY(ETHYLENE OXIDE)

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Chinese Journal of Polymer Science 2010年第4期28卷 597-605页

作者： Majid Peyravi Masoomeh Akhfash Ardestani Ali Akbar Babaluo Mir Karim Razavi Aghjeh Seyed Roohollah Pishghadam Elham Jannatdoust Nanostructure Materials Research Center(NMRC) Sahand University of TechnologyP.O.Box 51335/1996TabrizI.R.Iran Chemical Engineering Department Sahand University of TechnologyP.O.Box 51335/1996TabrizI.R.Iran Institute of Polymeric Materials Sahand University of TechnologyP.O.Box 51335/1996TabrizI.R.Iran Polymer Engineering Department Sahand University of TechnologyP.O.Box 51335/1996TabrizI.R.Iran

Segmented block copolymer based on nylon6 （N6） and polyethylene oxide （PEO） with stochiometric ratio was synthesized via a two-step process. The first step represents end capping of N6 in the presence of adipic acid leading to carboxy terminated N6, and the second one is polycondensation of the latter product with PEO in the presence of catalyst and thermostabilizer to form a high molecular weight multi-block copolymer. Several methods were applied to characterize the synthesized copolyrner such as Fourier transform infrared spectroscopy, proton nuclear magnetic resonance spectroscopy, differential thermal analysis, differential scanning calorimetry, X-ray diffraction and atomic force microscopy. The obtained results confirmed the multi-block structure for copolymer with a very high degree of micro-phase separation. Atomic force microscopy micrographs indicated that the morphology was the dispersion of high stiffness nanostructured polyamide （PA） domains in the amorphous region of PEO matrix, which can be very important in their performance for membrane processes.

关键词： Copolyetheramide Segmented block nylon6 Poly(ethylene oxide) Nanomaterial

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Tribological Behavior of MC nylon6 Composites Filled with Glass Fiber and Flyash

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Journal of Wuhan University of Technology(Materials Science) 2012年第2期27卷 290-295页

作者：张士华 School of Materials Science and Engineering Nanjing University of Science and Technology

To improve tribological property of MC nylon6, the glass fiber and fly ash reinforced monomer casting nylon compogites （GFFAPA） were prepared by anionic polymerization of e-caprolactam. The friction and wear behaviors of composites under dry condition, water lubrication and oil lubrication were investigated through a ring-black wear tester. Worn surfaces were analyzed using a scanning electron microscope. The experimental results show that the tensile strength and hardness of nylon composites are obviously improved with reinforcement increasing. Compared to MC nylon, the lowest friction coefficient and wear rate of glass fiber reinforced nylon composites （GFPA） with GF30% respectively decrease by 33.1% and 65.3%, of fly ash reinforced nylon composites （FAPA） with FA20% decrease by 5.2% and 68.9% and of GFFAPA composites with GF30% and FA10% decrease by 57.8% and 89.9%. The main wear mechanisms of FAPA composites are adhesive and abrasive wear and of GFPA composites with high proportion are abrasive and fatigue wear. The wom surfaces of GFFAPA composites are much multiplex and the optional distributing glass fiber and fly ash have a synergetic effect on the wear resistance for GFFAPA composites. Compared with dry friction, the friction coefficient and wear rate under oil lubricated conditions decrease sharply while the latter reversely increase under water lubricated conditions. The wear mechanisms under water lubricated condition are principally chemical corrosion wear and abrasive wear and they become boundary friction under oil lubricated condition.

关键词： nylon6 composite tribology friction wear

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nylon6复合材料的阻燃性能研究

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中北大学学报（自然科学版） 2015年第3期36卷 393-398页

作者：王超李迎春胡国胜中北大学材料科学与工程学院山西太原030051

针对目前无机阻燃剂对nylon6阻燃效果差的研究现状,考察了滑石粉、MCA、有机蒙脱土含量对nylon6复合材料力学性能和阻燃性能的影响.研究结果表明:随着三种阻燃剂用量的增加,nylon6拉伸强度都有不同程度的增加,其中添加MCA的拉伸强度增... 详细信息

针对目前无机阻燃剂对nylon6阻燃效果差的研究现状,考察了滑石粉、MCA、有机蒙脱土含量对nylon6复合材料力学性能和阻燃性能的影响.研究结果表明:随着三种阻燃剂用量的增加,nylon6拉伸强度都有不同程度的增加,其中添加MCA的拉伸强度增加最明显,从纯nylon6的78.13 MPa增加到90.65 MPa,增加了16%;随着阻燃剂用量的增加,nylon6冲击强度和熔融指数都有下降;当有机蒙脱土含量为10%时,nylon6复合材料的氧指数由20.71升高到27.89,增加了35%,继续增加有机蒙脱土用量,氧指数增加不明显.

关键词： nylon6 滑石粉 MCA 有机蒙脱土

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Production of Bone-like 40%nylon6,6-Nano Hydroxyapatite Scaffold via Salt-Leaching/Solvent Casting Technique

Production of Bone-like 40%nylon6,6-Nano Hydroxyapatite Scaf...

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International Conference on Chemistry and Chemical Engineering （ICCCE 2011）

作者： Mojtaba Nasr-Esfahani Mehran Mehrabanian Department of Materials Science Najafabad Branch Islamic Azad University Esfahan IRAN Member of Young Researchers Club Najafabad Branch Islamic Azad University Esfahan IRAN

As in situ synthesized N-HA/nylon6,6 powder is used for production of three-dimensional porous scaffolds which play an important role in tissue engineering. A new method of preparing porous scaffolds using nanocomposite powder was developed by salt leaching/solvent Casting Technique using NaCl crystals as the porogen material. The pore structures of the nanocomposite scaffold could be manipulated by controlling processing variables such as the size and weight fraction of the NaCl crystals and the nylon6,6 concentration. The morphologies, mechanical properties and in vitro bioactivity of the composite scaffolds were investigated. It was noted that the pore architectures could be manipulated by salt leaching parameters. The n-HA particles were dispersed in the pore walls of the scaffolds and were well bonded to nylon6,6. The introduction of HA greatly increased the stiffness and strength, and improved the in vitro bioactivity of the scaffolds. The results suggest these newly developed nano-HA/nylon6,6 composite scaffolds may serve as an effective three-dimensional substrate in bone tissue engineering.

关键词： scaffold nano hydroxyapatite nylon6 6 salt-leaching/solvent casting bioactivity.

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nylon6/ABS合金的制备及结构与性能研究

Nylon6/ABS合金的制备及结构与性能研究

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作者：王超中北大学

学位级别：硕士

聚合物共混材料的制备是实现高性能聚合物材料的重要途径之一，本论文将nylon6与ABS共混，采用ABS-g-MAH和SMA为相容剂对nylon6/ABS合金进行改性，并系统的研究了合金的形态结构和性能的关系。围绕高性能和理论研究做了较为深入的探索... 详细信息

聚合物共混材料的制备是实现高性能聚合物材料的重要途径之一，本论文将nylon6与ABS共混，采用ABS-g-MAH和SMA为相容剂对nylon6/ABS合金进行改性，并系统的研究了合金的形态结构和性能的关系。围绕高性能和理论研究做了较为深入的探索和分析，为高性能尼龙合金材料的开发和应用做了理论铺垫，除了对其结构和力学性能进行研究外，还对其流变行为、熔融和结晶行为进行了研究。主要研究内容如下： nylon6及合金力学性能的研究：研究发现随着相容剂的加入，合金的冲击强度先增大后减小，当相容剂ABS-g-MAH含量为20%与相容剂SMA含量为1.5%时，合金的冲击强度出现极大值;合金的拉伸强度和断裂伸长率均先增大后降低，在相容剂ABS-g-MAH含量为5%与相容剂SMA含量为1.5%时，合金的拉伸强度出现极大值。 nylon6及合金流变行为的研究：研究发现nylon6及合金均为假塑性流体，表现为切力变稀现象，且非牛顿指数随相容剂量的增加而减小。在同一剪切速率下，随相容剂含量的增加，合金的表观粘度依次增加，但当相容剂ABS-g-MAH含量超过30%时与相容剂SMA含量超过3%，合金表观粘度却大幅度降低。随相容剂含量增加，合金粘流活化能先增大后减小，其值不大，对温度变化不太敏感。对nylon6及合金的熔融和结晶行为的研究：研究表明，由于相容剂的加入产生了新的晶型，合金的晶型由γ晶型向α晶转变，ABS的加入对nylon6晶型没有太大影响。而且，由于相容剂的异相成核作用，以及nylon6与相容剂之间强烈的相互作用，破坏了nylon6的球晶结构，使nylon6的结晶形态发生了变化。而且nylon6及合金的熔融峰均出现了双重熔融峰现象。采用经典结晶动力学理论对nylon6及合金的结晶动力学进行了研究，结果表明：Avrami方程能很好的描述nylon6及合金的等温结晶动力学过程。Ozawa方程以及经过Jeziorny修正过的Avrami方程并不适合研究nylon6及合金的非等温结晶动力学，而适用于Mo法研究。在实验的基础上，拟合得到了nylon6及合金的各项结晶动力学参数。

关键词： nylon6 ABS ABS-g-MAH SMA 流变行为结晶行为

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尼龙6/蒙脱土纳米复合材料的结晶行为的研究

尼龙6/蒙脱土纳米复合材料的结晶行为的研究

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2004年全国高分子材料科学与工程研讨会

作者：王玉花邓飞蒋涛湖北大学化学与材料科学学院湖北大学化学与材料科学学院湖北大学化学与材料科学学院

＜正＞在尼龙6/蒙脱土纳米复合材料中,无论是用十二烷基胺或者是十八烷基胺处理过的蒙脱土（OMMT）与尼龙6（PA6）进行原位聚合还是熔融插层反应制备的尼龙/蒙脱土纳米复合材料,其中的蒙脱土都能促进尼龙的γ晶型的形成。[1,2]众所周知... 详细信息

＜正＞在尼龙6/蒙脱土纳米复合材料中,无论是用十二烷基胺或者是十八烷基胺处理过的蒙脱土（OMMT）与尼龙6（PA6）进行原位聚合还是熔融插层反应制备的尼龙/蒙脱土纳米复合材料,其中的蒙脱土都能促进尼龙的γ晶型的形成。[1,2]众所周知,结晶聚合物的物理、化学和机械性质极大的依赖其晶体的形态、结构和结晶度,研究表明在尼龙/蒙脱土纳米复合材料中尼龙的模量和热变形温度的改善归因于蒙脱土的添加以及因此而引起的尼龙

关键词： nylon6 montmorrillonite nanocomposite non-isothermal crystallization

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REINFORCEMENT EFFECT OF RESIN MATERIAL BY A SMALL AMOUNT OF CARBON NANO FIBER（VGCF）ADDTIVE

REINFORCEMENT EFFECT OF RESIN MATERIAL BY A SMALL AMOUNT OF ...

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作者： Yoshihiro Yamashita Toshimitsu Takahasi Akira Tanaka Materials Science The University of Shiga Prefecture2500 HassakaHikone 522-8533Japan Materials Science The University of Shiga Prefecture2500 HassakaHikone 522-8533Japan Materials Science The University of Shiga Prefecture2500 HassakaHikone 522-8533Japan

＜正＞The reinforcement effect for various resins blended with vapor-phase method carbon nano fiber（ VGCF） was examined. Modulus of elasticity and the yield stress of the nylon 6 of crystalline polymer became 1. 5 times and 1. 6 times in amount only 0. 1 wt% that VGCF had added. Moreover, the reinforcement effect of VGCF was observed also by the polypropylene. On the other hand, the reinforcement effect by the additive of VGCF was not observed as for the polystyrene and the polycarbonate of non-crystalline polymer. An optimal mixing rule to explain the reinforcement mechanism of VGCF was examined. A parallel model that consisted of fiber/matrix series and a single matrix was the most corresponding to the experimental result well. This result is very important in the design of the VGCF reinforced composite in the future. The method of combining the ultrasonic wave with a mechanical mixture was the best to improve the dispersibility of VGCF.

关键词： VGCF Nano Composites nylon6

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