共查询到20条相似文献,搜索用时 93 毫秒
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《精细化工原料及中间体》2005,(2):16-16,15
[英文名称]Polybutylene terephthalate[化学名称] 聚对苯二甲酸丁二醇酯[分子式、相对分子质量]平均相对分子质量:23000-30000[别名] 聚酯,PBT[物化性能]乳白色、无味无毒塑料颗粒,是一种结晶性、热塑性饱和聚酯树脂,密度1.31g/cm^3,熔点222-226℃,耐化学腐蚀,不溶于一般有机溶剂,在二氯乙烷、芳烃、醋酸、醋酸乙酯中可溶胀,在浓HNO3中可分解,纯PBT树脂机械性能一般,可用玻纤增强提高其性能和使用寿命。[毒性与保护] 无毒。 相似文献
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讨论了聚碳酸酯(PC)、聚对苯二甲酸乙二醇酯(PET)以及聚苯二甲酸三甲酯(PTT)共混改性聚对苯二甲酸丁二醇酯(PBT)的研究进展。聚酯之间具有较好的相容性。通过添加其它聚酯弥补了PBT的一些缺点,从而拓宽了PBT的应用领域。 相似文献
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1 引言 用环状的聚对苯二甲酸丁二醇酯(PBT)齐聚物C—PBT已成功地合成了高分子量的PBT.此合成方法的优越性体现在c.PBT粘度很低(17厘泊).聚合过程中无化学物排放。本文主要研究利用C—PBT制备高性能的PBT/有机改性的粘土纳米复合物。从结构上讲.理想的聚合物/粘土纳米复合物有两种:嵌 相似文献
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综述了聚对苯二甲酸丁二醇酯/黏土纳米复合材料研究的最新进展;从黏土表面改性剂的种类、黏土含量及其近、远程结构等方面总结了影响复合体系形态、黏弹特性、结晶行为的控制因素;探讨并评述了复合体系内部基体与黏土的多层次结构与其结晶、流变行为间的关系。 相似文献
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电子束辐照技术在聚乙烯材料加工改性中的应用 总被引:5,自引:0,他引:5
综述了电子束辐照技术用于聚乙烯材料交联和接枝改性的研究情况。通过交联可提高聚乙烯的耐热性和强度;通过接枝可在聚乙烯分子链上引入极性基团,提高表面张力,改进粘合性能等。还介绍了各类电子加速器设备,以及影响辐照反应的因素。 相似文献
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Mrinal Kanti Kundu Goutam Hatui Vineeta Nigam Arvind Kumar Saxena 《Polymer-Plastics Technology and Engineering》2015,54(7):691-702
A tubelike, naturally occurring halloysite clay mineral (HNTs) incorporated polyphosphazene (PPZ) elastomeric nanocomposites had been electron beam radiated and thermally treated for certain applications. To improve the dispersion of raw HNTs (H), an organosilane modifier had been exploited. Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) technique were utilized for plausible interaction and intercalation. The efficiency of electron beam radiation over chemical initiation for intra and inter chain network formation within the resin was substantiated through oil and solvent resistance studies. Effective delay in mass transport as compared to the virgin elastomer was observed through thermal analysis. 相似文献
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The efficacy of electron beam (EB), ozone (O3) and the combined EB/O3 treatment on the removal of phenol, as a prototype for aromatic pollutants in water, is compared on the base of degradation, chemical oxygen demand (COD), total organic carbon (TOC) and toxicity. Complete decomposition of phenol (47?mg/L, 500?µM) was obtained with 14?kGy. Applying simultaneously 27?mg O3/L a dose of 10.5?kGy was sufficient. By the same amount of only ozone a phenol concentration of 45% remained. A TOC reduction of more than 70% was attained with EB/O3 (21?kGy/54?mg O3/L), whereas the identical, separate conditions solely led to 24% (EB) and 14% (O3). The EB/O3 treatment showed also the best results in COD decrease (79%, 21?kGy/54?mg O3/L) and detoxification (7?kGy/18?mg O3/L). 相似文献
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In this study, the effects of ozone and electron beam radiation on color removal of dyes mixture were studied. According to the obtained results, the COD data denote that a first-irradiation process is a better one and the absorbency data denote that ozonation after irradiation will result in higher values of decolorization. Therefore, it can be said that a process that first applies an electron beam and then uses ozonation is better than the reverse process. Using a new approach for interpretation of the experimental decolorization results, it has been shown that the calculated dye removal percentages based on ozone consumption are near to experimental decolorization results. 相似文献
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从PBT生产的实际使用情况,探讨了原料PTA各项指标对产品色相的影响。其中PTA的4-CBA对产品b值有较大影响,PT酸对产品L值有较大影响,重金属含量对切片a值有较大影响,PTA的色相对产品色相有直接的正比关系影响,因此PBT生产过程中需根据各项指标挑选合适的PTA作为生产原料。 相似文献
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聚乙烯的增感辐射交联 总被引:3,自引:0,他引:3
详细考察了不同聚乙烯的辐射和增感辐射行为,以及多官能团单体的增感辐射效果,虽然不同聚乙烯的辐射交联机理是相似的,但它们在辐射过程中的行为有所不同。聚乙烯分子的线性程度越高,则凝胶形成速率越快,多官能团单体的存在,使聚乙烯的辐致凝胶形成速率被大大加快了,从而在一定范围内,相同辐射剂量下,含多官能团单体体系的聚乙烯凝胶含量高于无单体体系。交联度的提高,使含多官能团单体体系聚乙烯的拉伸性能、冲击性能、耐温性和耐环境应力开裂性能更为优异。 相似文献
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离聚物Surlyn对PBT及PBT/PP共混体系热稳定性的影响及其动力学研究 总被引:2,自引:1,他引:2
制备了PBT/PP/Surlyn的共混样品,用热重分析(TGA)、差示热重分析(DTG)等方法研究了离聚体Surlyn对PBT及PBT/PP共混体系热稳定性的影响,并进行了动力学处理。结果表明,在所研究的含量范围内(<10PHR),Surlyn可提高PBT的热稳定性,二者在热降解反应过程中不是彼此独立进行的,而是存在一定的相互作用;PBT/PP共混物呈现一个较简单的热降解过程,Surlyn的加入可使PBT/PP共混体系热稳定性有所提高,在Surlyn含量为4~6PHR时达到最佳。PBT/PP/Surlyn三元共混物的动力学参数是:在空气和N2中的热降解反应级数为1;频律因子为1021~1023数量级;表观活化能约为290kJ/mol。 相似文献