当前位置: X-MOL 学术J. Vinyl Addit. Technol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The overall crystallization behavior of polyethylene/wax blends as phase change materials for thermal energy storage: A mini review
Journal of Vinyl and Additive Technology ( IF 2.7 ) Pub Date : 2021-06-02 , DOI: 10.1002/vnl.21836
Thandi Patricia Gumede 1
Affiliation  

This review paper deals with the overall crystallization behavior of polyethylene/wax blends as phase change materials (PCMs) for thermal energy storage with the determination of their thermal properties. The addition of molten wax to the polyethylenes decreases the crystallization and melting temperatures of the blends. However, incorporating fillers to the polyethylene/wax blends can either decrease or increase the crystallization and melting temperatures of the composites depending on the filler type. The normalized enthalpy values of linear low-density polyethylene showed no significant change when increasing the wax content. On the contrary, the normalized enthalpy values of the wax in the blends were lesser than that of pure wax and increased with increasing wax content. Since the wax in the blend had a lower crystallinity compared to pure wax, this influences its effectiveness as a PCM for thermal energy storage. The effect of different polyethylenes on the wax morphology gave rise to enhance phase separation when wax was blended to high-density polyethylene as compared to the other polyethylenes. On the contrary, the effect of various waxes on the morphology of polyethylene resulted in different morphologies due to the molecular weight of the wax used and the structure of the polyethylene chain. The addition of fillers to the polyethylene (PE)/wax samples resulted in enhanced phase separation. The overall isothermal crystallization rate and the equilibrium melting temperature of PEs in the PEs/wax blends were depressed by wax addition due to the wax dilution effect.

中文翻译:

聚乙烯/蜡共混物作为热能储存相变材料的整体结晶行为:简短回顾

这篇综述论文涉及聚乙烯/蜡共混物作为用于热能储存的相变材料 (PCM) 的整体结晶行为,并确定了它们的热性能。向聚乙烯中加入熔融蜡会降低共混物的结晶温度和熔融温度。然而,根据填料类型,在聚乙烯/蜡混合物中加入填料可以降低或提高复合材料的结晶和熔融温度。随着蜡含量的增加,线性低密度聚乙烯的归一化焓值没有显示出明显的变化。相反,共混物中蜡的归一化焓值低于纯蜡,并随着蜡含量的增加而增加。由于与纯蜡相比,混合物中的蜡的结晶度较低,这会影响其作为热能储存 PCM 的有效性。与其他聚乙烯相比,当将蜡混合到高密度聚乙烯中时,不同聚乙烯对蜡形态的影响会增强相分离。相反,由于所用蜡的分子量和聚乙烯链的结构,各种蜡对聚乙烯形态的影响导致不同的形态。向聚乙烯 (PE)/蜡样品中添加填料导致相分离增强。由于蜡稀释效应,加入蜡会降低 PE/蜡共混物中 PE 的整体等温结晶速率和平衡熔化温度。这会影响其作为热能存储 PCM 的有效性。与其他聚乙烯相比,当将蜡混合到高密度聚乙烯中时,不同聚乙烯对蜡形态的影响会增强相分离。相反,由于所用蜡的分子量和聚乙烯链的结构,各种蜡对聚乙烯形态的影响导致不同的形态。向聚乙烯 (PE)/蜡样品中添加填料导致相分离增强。由于蜡稀释效应,加入蜡会降低 PE/蜡共混物中 PE 的整体等温结晶速率和平衡熔化温度。这会影响其作为热能存储 PCM 的有效性。与其他聚乙烯相比,当将蜡混合到高密度聚乙烯中时,不同聚乙烯对蜡形态的影响会增强相分离。相反,由于所用蜡的分子量和聚乙烯链的结构,各种蜡对聚乙烯形态的影响导致不同的形态。向聚乙烯 (PE)/蜡样品中添加填料导致相分离增强。由于蜡稀释效应,加入蜡会降低 PE/蜡共混物中 PE 的整体等温结晶速率和平衡熔化温度。与其他聚乙烯相比,当将蜡混合到高密度聚乙烯中时,不同聚乙烯对蜡形态的影响会增强相分离。相反,由于所用蜡的分子量和聚乙烯链的结构,各种蜡对聚乙烯形态的影响导致不同的形态。向聚乙烯 (PE)/蜡样品中添加填料导致相分离增强。由于蜡稀释效应,加入蜡会降低 PE/蜡共混物中 PE 的整体等温结晶速率和平衡熔化温度。与其他聚乙烯相比,当将蜡混合到高密度聚乙烯中时,不同聚乙烯对蜡形态的影响会增强相分离。相反,由于所用蜡的分子量和聚乙烯链的结构,各种蜡对聚乙烯形态的影响导致不同的形态。向聚乙烯 (PE)/蜡样品中添加填料导致相分离增强。由于蜡稀释效应,加入蜡会降低 PE/蜡共混物中 PE 的整体等温结晶速率和平衡熔化温度。由于所用蜡的分子量和聚乙烯链的结构,各种蜡对聚乙烯形态的影响导致了不同的形态。向聚乙烯 (PE)/蜡样品中添加填料导致相分离增强。由于蜡稀释效应,加入蜡会降低 PE/蜡共混物中 PE 的整体等温结晶速率和平衡熔化温度。由于所用蜡的分子量和聚乙烯链的结构,各种蜡对聚乙烯形态的影响导致了不同的形态。向聚乙烯 (PE)/蜡样品中添加填料导致相分离增强。由于蜡稀释效应,加入蜡会降低 PE/蜡共混物中 PE 的整体等温结晶速率和平衡熔化温度。
更新日期:2021-08-05
down
wechat
bug