聚乙烯蜡在塑料加工中的应用

聚乙烯蜡是低分子量的聚乙烯,因具有优良的性能而得到广泛的应用。本文简要介绍了聚乙烯蜡和改性聚乙烯蜡的分类、生产方法、性质,以及这些种类的聚乙烯蜡产品作为母粒分散剂、塑料加工润滑剂、木塑复合材料增容剂等在塑料加工过程中的应用。     

聚乙烯蜡的性能及应用

综述了聚乙烯蜡的种类、性能、发展前景及应用,重点介绍了制备色母粒所用聚乙烯蜡的关键指标,并报道了用聚乙烯蜡对蜡制品改性的初步结果     

聚乙烯蜡工艺技术进展和应用前景探讨

综述了国内外聚乙烯蜡的工艺技术进展情况,分析了聚乙烯蜡在涂料、油墨及色母粒等领域的应用情况,对今后我国聚乙烯蜡的应用前景进行了探讨。     

聚乙烯蜡、氧化聚乙烯蜡生产应用及其粘均分子量的测定

简要介绍了聚乙烯蜡、氧化聚乙烯蜡的应用、生产及粘均分子量的测定。     

聚乙烯蜡粉在磁条中的应用分析

介绍了磁条、磁卡、聚乙烯蜡粉的特性,通过实验对聚乙烯蜡粉在磁条保护层中的应用机理的分析、总结,探讨了在磁条保护层中较好地应用聚乙烯蜡粉的方法,从而使磁卡中的磁条适应磁卡制作工艺、存储读写应用性能大为提高,确保了信息安全。     

聚乙烯蜡,氧化聚乙烯蜡生产应用及其粘均分子量的测定

简要介绍了聚乙烯蜡、氧化聚乙烯蜡的应用、生产及粘均分子量的测定。     

聚乙烯微粉蜡在涂料工业中的应用

介绍了聚乙烯微粉蜡在涂料工业中的应用，阐述了微粉蜡的应用机理和在加工中所使用的工艺，指出聚乙烯微粉蜡在使用过程中应注意的问题及其行业发展前景。     

聚乙烯蜡的制备工艺、市场及应用

综述了聚乙烯蜡的制备工艺、市场及应用情况,并结合国内的研发和生产现状,提出了我国今后聚乙烯蜡的发展方向。     

聚乙烯蜡的合成及应用

聚乙烯蜡作为一种低分子量的产物,是化工生产中一种重要的加工助剂。因其与聚烯烃树脂和其它品种的蜡有良好的相容性,被广泛应用于塑料和特种蜡的改性。本文概述了聚乙烯蜡的生产方法和其在化工行业中的应用,并指出了聚乙烯蜡未来的发展前景和应用方向。     

聚乙烯蜡的生产及应用前景

概述了聚乙烯蜡的生产方法及其改性研究进展，介绍了聚乙烯蜡在涂料、色母粒、油墨以及塑料加工等领域的应用情况，指出了其今后的发展前景。     

Investigation of thickness and wax content of wax deposits in polyethylene pipe using a flow loop

In this study, the thickness and wax content of wax deposits were found to be thinner and lower in the polyethylene (PE) pipe than in the stainless steel (SS) pipe using a flow loop apparatus. The diffusivity of wax, radial thermal gradient, and wax precipitation rate in the PE and SS pipes were calculated and compared. It was found the diffusivity of wax in the PE pipe was higher and tended to enhance the wax deposition in the PE pipe, while the radial thermal gradient and wax precipitation rate were lower in the PE pipe and had the opposite effects. These factors are shown to be comparable with each other and the effect of the thermal gradient dominates the mass flux of wax from bulk to the oil-deposit interface and into the deposits finally, thus causing differences in thickness and wax content of deposits between the PE and SS pipes.     

硬脂酸钙对石蜡、硬脂酸润滑作用的影响及其理论分析

详细地论述了硬脂酸钙（CaSt2）对石蜡、聚乙烯蜡（PE蜡）、硬脂酸（HSt）润滑作用的影响,并进行了理论分析,提出了＂润滑膜强度＂及＂铆钉作用＂概念.只用非极性石蜡、PE蜡时,其润滑膜的抗撕裂强度及其黏附强度较低,强极性CaSt2与PVC树脂表面及金属表面形成化学吸附络合键,从而起到＂铆钉作用＂,增加了石蜡、PE蜡润滑膜的强度,提高了石蜡、PE蜡的润滑作用.通过对金属皂等极性润滑剂化学结构的理论分析,笔者认为：金属皂类等极性润滑剂可以视为油溶性表面活性剂（润湿剂）,并用表面活性剂能降低PVC树脂界面张力的规律解释了CaSt2对石蜡、PE蜡、HSt润滑作用的影响.     

Physical wrapping of reduced graphene oxide sheets by polyethylene wax and its modification on the mechanical properties of polyethylene

A facile method to encapsulate the reduced graphene oxide (RGO) sheets physically with polyethylene (PE) wax was developed. The graphene oxide sheets were first wrapped with polyethylene wax, and reduced by hydrazine hydrate. The structure of the wrapped RGO was confirmed by means of Fourier transform infrared spectroscopy, X‐ray diffraction (XRD), and Raman spectroscopy. The PE wax‐wrapped RGO sheets were melt blended with PE to prepare PE/RGO nanocomposites. Transmission electron microscopy and XRD studies showed that this method could provide uniform dispersion of RGO sheets in the PE matrix. Scanning electron microscopy and Raman spectroscopy indicated that there was a strong interfacial interaction between the PE wax‐wrapped RGO sheets and PE matrix. Addition of 1 wt % RGO sheets in PE matrix led to a 48% increment in the yield stress and 118% increment in the Young's modulus, respectively. However, the elongation at break decreased with increasing RGO sheets loading content. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

不同润滑剂对HDPE流变性能的影响

利用RH2200恒速型毛细管流变仪考察了硬脂酸镧复合物（RC）分别和聚乙烯蜡共混前后对高密度聚乙烯（HDPE）挤出性能的影响。与纯HDPE5000S相比，加入1．5份RC和1．0份或3．0份聚乙烯蜡混合物以后，熔体的表观粘度降低，发生压力振荡时候的滑移长度减少以及信号强度明显消失。     

含氟弹性体/聚乙烯蜡复合润滑剂对HDPE流变性能的影响

为了改善高密度聚乙烯(HDPE)熔体的流动不稳定性,在HDPE中添加了不同份数的含氟弹性体/聚乙烯蜡复合润滑剂。试验结果表明:在HDPE5000S加入0.125份含氟弹性体/5份聚乙烯蜡复合润滑剂,熔体不稳定流动现象在低剪切速率下明显改善。     

耐溶剂橡胶配方的研究

研究了某种特种橡胶（R）与聚乙烯蜡（PE）及低密度聚乙烯（LDPE）共混硫化胶的耐天那水、甲苯体积变化率和某些物理性能。随着PE蜡或LDPE的用量增大,在相同浸泡时间下,共混硫化胶在天那水或甲苯中的体积变化率逐渐降低,且达到溶胀平衡的时间变长;共混比为80/20和70/30的R/PE蜡和R/LDPE硫化胶一般力学性能差别不大。     

PA/PE回收料的再生改性

通过添加扩链剂KL-E4370、氧化钙和氧化聚乙烯蜡对PA/PE回收料进行扩链、除水和原位生成相容剂的再生改性。结果显示,扩链剂KL-E4370用量为0.7%,氧化钙用量为2%,改性效果最好,添加1%的氧化聚乙烯蜡改善了PA和PE的相容性。     

Preparation of PLA-Coated Energy Storage Microcapsules and Its Application in Polyethylene Composites

With polylactic acid (PLA) resin as walls and paraffin wax as core substances, phase change microcapsules were prepared based on solvent evaporation method. The energy storage microcapsules (ESM) agents had a mean diameter of about 5 ～ 10 µm. Moreover, the thermal properties of the ESM agents were measured by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Different types of PE composites were prepared with different amounts of these additives. The energy storage properties of PE/ESM composites were improved compared with that of pure PE and PE/paraffin wax composites. However, the tensile properties of these composites showed remarkable decrease.     

辽化HDPE装置浆液外循环技术改造后釜内的聚合过程分析

通过对辽阳石油化纤公司高密度聚乙烯淤浆聚合装置外循环撤热技术改造前后生产GF7750M牌号产品时聚合过程的工程分析,发现了釜内聚合过程特征的变化,提出了聚乙烯蜡含量的明显上升是引起聚合物粘壁加剧的最直接原因,并通过分析得出了可能导致聚乙烯蜡含量上升的主要因素以及进一步提高装置生产能力的可能性和主要手段。