Permeation Characteristic and Mechanism of CO2 in High Density Polyethylene
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The effect of virgin, high-density polyethylene (HDPE)/recycled HDPE composition on the physical properties of the blends was investigated. The recycled HDPE was obtained from a postconsumer cycle of milk bottles. It was found that elongation at break was the mechanical property mostly affected by the content of recycled HDPE. Overall, however, the recycled HDPE from milk bottles was found to be a material with useful properties not largely different from those of virgin resin and thus could be used, at an appropriate concentration in virgin HDPE, for different applications.
High-density polyethylene
Elongation
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Hot Rolled Sheet (HRS) is a kind ofpavement mix design that consist of aggregate, asphalt, and filler. The materials were hotmixed and compacted in specific temperature. The use of additive material was expected to improve the characteristic of asphalt mix design that is shown by Marshall Test. High density polyethylene (HDPE) was polymer that has thermoplastic characteristic which is similar with the characteristic of asphalt. The purpose of this research is to know whenever HDPE can be added into, also it is expected that HDPE may improve the mixture. In this research the use of HDPE waste in the mixtures was 0%, 3%, 5%, 7% and 9%. Asphalt content was 5%, 5.5%, 6%, 6.5%, and 7%. Analysis is based on the references, especially regulation that published by BinaMarga (2010). The result of research, show HDPE content 3% and 5 two samples for each proportion of HDPE, therefore, there are 50 samples in total. The result of this research is that HDPE can be use as additive in HRS WC with content 3% and 5%. The optimum asphalt content is 6.8%. The additions of HDPE also increase several Marshall Parameters such as stability value, VITM value and MQ value. However, HDPE decrease flow, VFWA, and density value of the mixture
High-density polyethylene
Filler (materials)
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High Density Polyethylene (HDPE) polymer is widely being used nowadays. The advantages possessed by this polymer make it more preferable than metals. Lightweight, ease of manufacture, stronger and tough are HDPE specialties that make it as the top choice by manufacturers. However, the main disadvantages about this material is that their decaying consumes much time and this effects the environment as this material will dispose as wastes if they could not longer being used. Also, cause loss to certain companies. Therefore, ways to overcome this problem must be found, which is by recycling process. In recycling HDPE polymer, there is one method that mostly been used which is by mixing the recycled HDPE with pure HDPE with certain percentage of both materials. In this project, the pure HDPE were mixed with recycled HDPE according to determined percentages. The samples produced then will undergo tensile test in order to determine the percentage which posses the optimum tensile strength. In the end of experiment, it showed that the mixture with 90% of pure HDPE with 10% recycled HDPE is the best percentage compared to others. This experiment was conducted by following ASTM D638.
High-density polyethylene
Dispose pattern
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디스플레이 제조 공정에서는 초순수 증류수 (DIW: Deionized Water)에 산화력이 강한 오존 가스를 강제로 용해 시켜 오존 수를 만들어 웨이퍼 위에 있는 금속성 이온을 용해한다. 이 과정을 거친 오존 수는 고밀도 폴리에틸렌 (HDPE: High Density Polyethylene, 이하 HDPE) 재질의 배관을 통해 폐수 처리 탱크로 이송된다. 그러나 최근 디스플레이 산업현장에서 HDPE 재질의 오존 폐수 배관에서 2년간 35회가 넘는 배관 균열 사고가 발생하였다. 또한 OLED 패널의 생산량 증가로 오존 폐수 배관의 충수 비율이 약 20%에서 약 90%로 높아지면서, 배관 내의 기층부 오존 농도는 약 14배로 증가하였다. 오존 가스는 인체에 대한 유독성이 매우 크다. 또한, 폐수 배관을 시공할 때 우회 배관을 따로 시공하지 않기 때문에 배관에 문제가 발생할 경우 배관 보수가 완료되는 시점까지 생산을 중단해야 하는 문제가 있다. 본 논문에서는 사용 전후 HDPE 소재 배관의 기계적 물성을 비교하여 보았다. 그 결과 5년간 오존 가스에 노출된 HDPE 배관은 미사용 배관에 비교하여 인장 강도, 연신율, 내압 파열강도, 충격에너지, 경도 등의 저하가 발생 되었으며, 배관 표면에 산화와 미세 균열이 발생하여 사용 안전성이 매우 저하되었음을 확인하였다. HDPE 배관에서 환경에 의한 균열이 발생하기 전에 주기적인 점검이 중요함을 확인할 수 있었다.
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影响丙烯共聚物(欧洲电脑生产厂商) 和 isotactic 聚丙烯(iPP ) 独立被选择准备由热出版社与高密度聚乙烯(HDPE ) 把压成薄片。皮 IPC/HDPE 强迫， iPP/HDPE 把压成薄片被检验，并且在 IPC/HDPE 的焊接联合力量把压成薄片，这被发现比 iPP/HDPE 的戏剧性地高把压成薄片。根据欧洲电脑生产厂商的特殊微观结构，乙烯的共结晶在乙烯丙烯分割块在 HDPE 的欧洲电脑生产厂商和 PE 链的共聚物(EbP ) 部件被建议解释焊接的 highstrength。DSC 结果显示那确实在那里存在在欧洲电脑生产厂商和 HDPE 之间的某相互作用，和在欧洲电脑生产厂商的可结晶的 PE 部件能影响 HDPE 的结晶化。IPC/HDPE 混合的扫描电子显微镜(SEM ) 观察证明 HDPE 趋于与 PE 富有的 EbP 链呆在一起形成驱散的阶段，显示在欧洲电脑生产厂商的 HDPE 和 EbP 部件之间的好可混和性。根据上述结果， IPC/HDPE 的高焊接力量上的 IPC 和 HDPE 的部件把压成薄片的 PE 的共结晶的效果被证实。
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The present study explores the possibilities of reinforcing High-Density Poly Ethylene (HDPE) + Nano-Clay (NC) composite with locally available inexpensive plane woven bi-directional Silk Fibre (SF) fabric for developing a new tribo material. HDPE, NC & SF were incorporated into produce hybrid laminated composites using a hot compression technique. Further, the additions of NC to bi-directional SF-based HDPE composites at five levels in the range 0.1–1.0 wt-% have improved the tribological characteristics greatly compared to HDPE + SF samples as well as pure HDPE. The experimental results indicate that SF and NC improved the wear behaviour of neat polymer. The CoF of HDPE + SF + 0.1NC over HDPE + SF & pure HDPE decreased by 15% and 30%, respectively. The results reveal that the wear loss of HDPE + SF + 0.1NC is very much lower over HDPE + SF & pure HDPE and they are about 24% and 30%, respectively.
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The nationally-recognized Susquehanna
Chorale will delight audiences of all
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to be moved, to be part of the
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working at an extremely high
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singing that will take you to new
heights!
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Nano composites, a high performance material exhibit unusual property combinations and unique design possibilities. With an estimated annual growth rate of about 25% and fastest demand to be in engineering plastics and elastomers, their potential is so striking that they are useful in several areas ranging from packaging to biomedical applications. In this unified overview the three types of matrix Nano composites are presented underlining the need for these materials, their processing methods and some recent results on structure, properties and potential applications, perspectives including need for such materials in future space mission and other interesting applications together with market and safety aspects. Possible uses of natural materials such as clay based minerals; chrysotile and lignocellulose fibers are highlighted.
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