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wubinwei金虫 (正式写手)
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求助：论文摘要帮忙翻译，谢谢
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抗熔滴涤纶纤维的研究 摘要 涤纶纤维以其优异的性能，具有广泛的应用和产业基础。但涤纶纤维属于熔融性可燃纤维，在燃烧时容易形成熔滴，熔滴却能带来更严重的灾害，因此对其纤维进行改性，增加其抗熔滴性能，己成为了一个广受关注的研究方向。目前抗熔滴的研究大多都是采用添加抗熔滴添加物(如聚四氟乙烯、纳米颗粒或者合成的物质)与聚合物基体进行共混，或者利用共聚法，但是基本都存在纺丝难或者添加量少，效果不好的问题。 签于此，本文提出了一种在PET纤维中形成少量热固性树脂的抗熔滴改性思路，具体方法是在PET基体中添加一种可塑性物质-苯代三聚氰胺(BG)进行共混，制备PET/BG共混纤维，然后将纺出的共混纤维在甲醛溶液中进行处理，纤维中的BG会和甲醛反应生成三维网状的热固性树脂，燃烧时该树脂能起到保护作用和迅速炭化并增加成炭量，对熔滴起到吸附作用，以达到抗熔滴的目的。通过熔体流动速率仪和RH-7毛细管流变仪、EDS、滴定法、SEM、FTIR、XRD 、TG、DSC和氧指数(LOI)等手段研究了PET/BG共混物的流变性能和BG的迁移性、BG与甲醛的反应特性以及纤维的各种性能，主要研究内容及结论包括： (1)熔体流变速率仪和RH-7型毛细管流变仪对PET、PET/BG共混物熔体进行流变性能的测试，结果表明PET/BG共混物的熔融指数随着BG含量的增加而增大，其表观粘度随着温度的升高和剪切速率的增加逐渐减小，其熔体表现假塑性流体的特性，不同温度下非牛顿指数n都小于1，且随着温度的升高而逐渐增大；结构粘度指数随着温度的升高而逐渐降低；粘流活化能随剪切速率的增加而减小。在所研究的BG含量范围内，随着BG含量的增加，PET/BG共混物熔体的非牛顿指数越大，结构粘度指数和粘流活化能越小。 (2)X射线能谱仪和熔体流变速率仪的测试结果表明BG在PET/BG共混物的制备过程中发生了迁移。 (3)利用盐酸羟胺法和碘量法、红外光谱的内标法研究了BG和甲醛的反应特性，就单因素考虑可以得出：在羟甲基化阶段，最佳反应温度为80℃，反应时间为40min，反应pH值为8.5。在缩聚阶段，根据实验并结合实际，本文所采用的缩聚温度为80℃，反应时间为2h，反应pH值为4～5。 (4)通过SEM、FTIR、XRD和热分析等研究表明，与纯涤纶纤维相比，抗熔滴涤纶纤维的表面较粗糙，在抗熔滴涤纶纤维的制备过程中，PET/BG共混纤维中BG与甲醛发生了反应，并且纤维的结晶结构并没有随着BG的加入和反应的发生而发生变化。 (5)通过抗熔滴性能测试，TG、DSC和氧指数(LOI)等测试表明，抗熔滴涤纶纤维与纯涤纶纤维相比，单位时间(1min)内熔滴数量减少，同时在实验的BG范围内，随着BG含量的增加，其抗熔滴性逐渐增强，LOI逐渐增大，但是其热稳定性降低。 关键词：涤纶纤维 流变性能 苯代三聚氰胺(BG) 抗熔滴 热分析 |
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zcy86520
铁杆木虫 (著名写手)
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wubinwei(金币+5,VIP+0):怎么一样啊 11-24 21:32
zap65535(金币-5,VIP+0):机器翻译不能给分 12-22 00:28
zap65535(金币-5,VIP+0):机器翻译不能给分 12-22 00:28
| Polyester fiber for its excellent performance, with a wide range of applications and industrial base. However, polyester fibers are fused nature of flammable, easy to form in the combustion of droplets, droplet was able to bring about a more serious disaster, so its fibers modified to increase its anti-droplet properties, has become a widely concerned about the research direction. At present the study of anti-droplet mostly used to add anti-droplet additives (such as Teflon, nano-particles or synthetic material) and the polymer matrix to blend, or the use of copolymerization, but the basic difficulties exist spinning or add less, the effect bad problem. Sign of this, this paper presents a small amount of PET fibers to form droplets of thermosetting resin-modified anti-thinking, a specific method is to add a PET matrix plasticity of material - BENZOGUANAMINE (BG) for blending, preparation PET / BG blend fibers, and then spun out in the formaldehyde solution blend fiber processing, fiber and formaldehyde in the BG would be the reaction of three-dimensional network of thermosetting resin, burning the resin can play a protective effect and rapid carbonization and to increase as the amount of carbon on the adsorption of droplet play a role, in order to achieve the purpose of anti-droplet. Melt flow rate through the instrument and RH-7 Capillary Rheometer, EDS, titration, SEM, FTIR, XRD, TG, DSC and oxygen index (LOI) was studied by means of PET / BG rheological properties of blends and BG's mobility, BG and formaldehyde reaction characteristics, as well as the various properties of fibers, the main research findings and conclusions include: (1) melt rheological rate instrument and RH-7-type capillary rheometer PET, PET / BG of blend melt rheological properties of the test results show that PET / BG blends melt index increases with the BG content increased, the apparent viscosity with temperature and shear rate increased gradually decreases, the melt characteristics of the performance of pseudo-plastic fluid, different temperatures of non-Newtonian index n are less than 1, and as the temperature gradually increased; structural viscosity index as the temperature rises gradually to reduce ; viscous flow activation energy with the shear rate increases. BG levels in the studied context, with the increase in BG levels, PET / BG melt blend of non-Newtonian index the greater the structural viscosity index and the smaller activation energy of viscous flow. (2) X-ray spectrometer and the rate of melt rheology instrument test results show that BG in the PET / BG blends migration occurred during the preparation. (3) the use of hydroxylamine hydrochloride method and iodometric method, infrared spectra were studied within the standard response characteristics of BG and formaldehyde on the single factor to consider can be drawn: In the hydroxymethyl phase, the best reaction temperature is 80 ℃, reaction time was 40min, reaction pH value of 8.5. In the polycondensation stage, according to the experimental and the light of reality, in this paper used in condensation temperature of 80 ℃, reaction time 2h, reaction pH value of 4 ~ 5. (4) by SEM, FTIR, XRD and thermal analysis studies have shown that compared with pure polyester fiber, polyester fiber anti-droplet surface is rough, in the anti-droplet during the preparation of polyester fiber, PET / BG blend fiber BG and formaldehyde in the reaction occurred, and the crystal structure of fibers is not with the accession of BG and the occurrence of reactions to change. (5) by anti-droplet performance testing, TG, DSC and oxygen index (LOI) and other tests show that anti-droplet of pure polyester fiber and polyester fiber than the unit time (1min) decrease in the number within the droplet, while the experiment within the framework of BG, with BG content increased, its anti-droplet of a gradual increase, LOI increased gradually, but its thermal stability was reduced. |
4楼2009-11-24 18:47:48
wubinwei(金币+5,VIP+0):谢谢。可不可以不用googlea啊 11-24 21:31
zap65535(金币-5,VIP+0):机器翻译不能给分 12-22 00:28
zap65535(金币-5,VIP+0):机器翻译不能给分 12-22 00:28
|
Anti-Droplet Polyester Fiber Abstract Polyester fiber for its excellent performance, with a wide range of applications and industrial base. However, polyester fibers are fused nature of flammable, easy to form in the combustion of droplets, droplet was able to bring about a more serious disaster, so its fibers modified to increase its anti-droplet properties, has become a widely concerned about the research direction. At present the study of anti-droplet mostly used to add anti-droplet additives (such as Teflon, nano-particles or synthetic material) and the polymer matrix to blend, or the use of copolymerization, but the basic difficulties exist spinning or add less, the effect bad problem. Sign of this, this paper presents a small amount of PET fibers to form droplets of thermosetting resin-modified anti-thinking, a specific method is to add a PET matrix plasticity of material - BENZOGUANAMINE (BG) for blending, preparation PET / BG blend fibers, and then spun out in the formaldehyde solution blend fiber processing, fiber and formaldehyde in the BG would be the reaction of three-dimensional network of thermosetting resin, burning the resin can play a protective effect and rapid carbonization and to increase as the amount of carbon on the adsorption of droplet play a role, in order to achieve the purpose of anti-droplet. Melt flow rate through the instrument and RH-7 Capillary Rheometer, EDS, titration, SEM, FTIR, XRD, TG, DSC and oxygen index (LOI) was studied by means of PET / BG rheological properties of blends and BG's mobility, BG and formaldehyde reaction characteristics, as well as the various properties of fibers, the main research findings and conclusions include: (1) The rate of melt rheological instrument and RH-7-type capillary rheometer PET, PET / BG blend melt rheological properties of the test results show that PET / BG blend melt index as the BG increased with increasing content of its apparent viscosity with temperature and shear rate increased gradually decreases, the performance of its melt characteristics of pseudo-plastic fluid, different temperatures of non-Newtonian index n are less than 1, and as the temperature gradually increased; structural viscosity index as the temperature rises gradually reduced; viscous flow activation energy with the shear rate increases. BG levels in the studied context, with the increase in BG levels, PET / BG melt blend of non-Newtonian index the greater the structural viscosity index and the smaller activation energy of viscous flow. (2) X-ray spectrometer and the rate of melt rheology instrument test results show that BG in the PET / BG blends migration occurred during the preparation. (3) the use of hydroxylamine hydrochloride method and iodometric method, infrared spectra were studied within the standard response characteristics of BG and formaldehyde on the single factor to consider can be drawn: In the hydroxymethyl phase, the best reaction temperature is 80 ℃, reaction time was 40min, reaction pH value of 8.5. In the polycondensation stage, according to the experimental and the light of reality, in this paper used in condensation temperature of 80 ℃, reaction time 2h, reaction pH value of 4 ~ 5. (4) by SEM, FTIR, XRD and thermal analysis studies have shown that compared with pure polyester fiber, polyester fiber anti-droplet surface is rough, in the anti-droplet during the preparation of polyester fiber, PET / BG blend fiber BG and formaldehyde in the reaction occurred, and the crystal structure of fibers is not with the accession of BG and the occurrence of reactions to change. (5) by anti-droplet performance testing, TG, DSC and oxygen index (LOI) and other tests show that anti-droplet of pure polyester fiber and polyester fiber than the unit time (1min) decrease in the number within the droplet, while the experiment within the framework of BG, with BG content increased, its anti-droplet of a gradual increase, LOI increased gradually, but its thermal stability was reduced. Key words: rheological properties of polyester fiber benzoguanamine (BG) of anti-droplet thermal analysis |
3楼2009-11-24 17:33:15
wubinwei
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呵呵，我写好了！麻烦高手帮忙改一下！！谢谢
|
The Studies on Anti-Dropping Polyester Fiber Abstract For their excellent performance, polyester fibers have the widespread application and the industrial foundation. However, polyester fibers belong to the fused and flammable fibers, when burning they are easy to form drops, drops can bring including burns etc. secondary damage, so the modification of polyester fibers to improve the performance of anti-dropping has become a research hotspot. At present the study of anti-dropping mostly used to add anti-dropping additives (such as PTFE, nano-particles etc.) for blending with the polyester matrix, or use copolymerization, but these methods exist difficulty spinning or add less spinning ineffective problem. Thereupon, this paper proposes a way of forming a few thermosetting resin in the polyester fibers, the concrete method is to add hot plasticity material-- Benzoguanamine (BG) to PET, and prepare the PET/BG blending fibers, and then treat the fibers by using the formaldehyde solution, BG and formaldehyde would be the reaction of three-dimensional network of thermosetting resin, when burning the resin can play a protective effect and be rapidly burning into charcoal carbonization and to increase the amount of carbon on the adsorption of drops, in order to achieve the purpose of anti-dropping. Theological properties of PET/BG blends and BG’s mobility, the reaction characteristics of BG and formaldehyde, as well as the various properties of fibers was studied by means of melt flow rate measurer and RH-7 Capillary Rheometer, EDS, titration method, SEM, FTIR, XRD, TG, DSC and oxygen index (LOI). The main research contents and conclusions include: (1)The rheological properties of PET, PET/BG blends were investigated by melt flow rate measurer and RH-7 Capillary Rheometer It is indicated that the PET/BG blends melt index increased along with increasing of the BG content; the apparent viscosity gradually decreases with temperature and shear rate increased, their melts belonged to non-Newtonian pseudo-plastic fluid; under the different temperature non-Newton index(n）and the structural viscosity index gradually increased along with raising the temperature. The activation energy of viscosity flow increased along with enhancing the shear rate. Within the framework of the study, with the BG content increasing, PET/BG blends melt's non-Newton index increased, the structural viscosity index and the activation energy of viscosity flow reduced. That indicated there were little influence on the spinning properties which add BG into the PET. (2) Melt flow rate measurer and the X-ray EDS results showed that BG had the migration in the preparation process of PET/BG blends. (3)Using the oxammonlum hydrochloride and the iodimetric method, infrared spectrum's internal standard method had studied BG and the formaldehyde reaction characteristics, on the single factor considered that obtained: In the hydroxymethylation phase, the best reaction temperature was 80℃, time was 40min, pH was 8.5; In the condensation stage, the condensation temperature was 80℃, time was 2h, pH was 4~5. In these conditions, it was easy to form a multi-cross-linking thermosetting resin with network structure. (4)SEM, FTIR, XRD characterizations showed that: compared with the polyester fiber, the anti-dropping polyester fibers' surface was rough, BG in the PET/BG blending fibers and the formaldehyde had the reaction in the anti-dropping polyester fiber's preparation process, and the crystal structure of fibers was not changed with the accession of BG and the occurrence of reactions. (5)The anti-dropping performance test, TG, DSC and oxygen index (LOI) indicated that: compared with the polyester fiber, the number of the drops of the anti-dropping polyester fiber in unit time(1min) decreased, along with BG content's increasing, char residue were raised, their anti-dropping performance strengthened and LOI increased gradually, but their thermo stability reduced. Key words: polyester fiber; rheological properties; benzoguanamine(BG); anti-dropping; thermal analysis |
5楼2009-11-26 20:00:30
cam967
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★ ★ ★ ★ ★ ★ ★ ★ ★ ★
zap65535(金币+10,VIP+0):补发 12-22 00:29
zap65535(金币+10,VIP+0):补发 12-22 00:29
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抗熔滴涤纶纤维的研究 摘要 涤纶纤维以其优异的性能，具有广泛的应用和产业基础。但涤纶纤维属于熔融性可燃纤维，在燃烧时容易形成熔滴，熔滴却能带来更严重的灾害，因此对其纤维进行改性，增加其抗熔滴性能，己成为了一个广受关注的研究方向。目前抗熔滴的研究大多都是采用添加抗熔滴添加物(如聚四氟乙烯、纳米颗粒或者合成的物质)与聚合物基体进行共混，或者利用共聚法，但是基本都存在纺丝难或者添加量少，效果不好的问题。 The Studies on Anti-Dropping Polyester Fiber （A simple and effective method to improve Anti-Dropping property of Polyester Fiber） Abstract For(Because of) their excellent performance(s), polyester fibers have (gained) widespread application and (possessed) industrial foundation. However, belonging to the fused and flammable fibers, polyester fibers are easy to form drops when burning, which can bring about secondary damage. So it has become a research hotspot to modify the polyester fibers so as to improve the performance of anti-dropping. At present the study of anti-dropping mostly used to add anti-dropping additives (such as PTFE, nano-particles etc.) for blending with the polyester matrix, or use copolymerization, but these methods exist difficulty spinning or add less spinning ineffective problem. Published papers/ There have been several methods to ….firstly, secondly. But all of these methods have their drawbacks, such as …………….. |
6楼2009-11-26 22:43:36
