Comparison of thermal insulation performance of foam extruded black EPS

IF 3.1 3区化学 Q2 POLYMER SCIENCE

Polymer Bulletin Pub Date : 2024-09-05 DOI:10.1007/s00289-024-05485-6

E. Erünal

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Abstract

Thermal resistance of expanded polystyrene (EPS) insulation boards are investigated in terms of foam extrusion process equipped with an underwater pelletizer. This method has been used by several companies as an alternative process to obtain EPS beads from suspension polymerization of styrene. In this process either polystyrene granules with no cellular microstructure (general purpose polystyrene) or polystyrene beads with closed cell structure or both together can be used. Therefore, in this study, commercial general purpose polystyrene and expandable polystyrene materials were blended with either carbon black or graphite powder through foam extrusion process to obtain effective thermal resistance values. In order to make a fair comparison, materials were prepared similar to commercial recipes which include flame retardant and nucleating agent. It was observed that the compatibility of graphite powder with general purpose polystyrene was better than expandable polystyrene in terms of glass transition temperatures and thermal insulation values. The density of the prepared materials increased with the addition of carbon black to all samples. The best glass transition temperature was measured as 107.5 °C while the best thermal conductivity value was recorded as 0.2997 W/m.K which is fairly good when compared to commercial polystyrene insulation boards.

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泡沫挤压黑色发泡聚苯乙烯的隔热性能比较

根据配备水下造粒机的泡沫挤压工艺，对发泡聚苯乙烯（EPS）绝缘板的热阻进行了研究。该方法已被多家公司用作从苯乙烯悬浮聚合中获得发泡聚苯乙烯颗粒的替代工艺。在这一工艺中，既可以使用没有微孔结构的聚苯乙烯颗粒（通用聚苯乙烯），也可以使用具有闭孔结构的聚苯乙烯珠子，还可以同时使用这两种材料。因此，在本研究中，商用通用聚苯乙烯和可发性聚苯乙烯材料通过泡沫挤出工艺与炭黑或石墨粉混合，以获得有效的热阻值。为了进行公平比较，材料的制备方法与商用配方相似，其中包括阻燃剂和成核剂。据观察，就玻璃化温度和隔热值而言，石墨粉与通用聚苯乙烯的相容性优于可膨胀聚苯乙烯。所有样品中添加炭黑后，制备材料的密度都有所增加。测得的最佳玻璃转化温度为 107.5 °C，最佳导热值为 0.2997 W/m.K，与商用聚苯乙烯隔热板相比相当不错。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polymer Bulletin 化学-高分子科学

CiteScore

6.00

自引率

6.20%

发文量

审稿时长

5.5 months

期刊介绍： "Polymer Bulletin" is a comprehensive academic journal on polymer science founded in 1988. It was founded under the initiative of the late Mr. Wang Baoren, a famous Chinese chemist and educator. This journal is co-sponsored by the Chinese Chemical Society, the Institute of Chemistry, and the Chinese Academy of Sciences and is supervised by the China Association for Science and Technology. It is a core journal and is publicly distributed at home and abroad. "Polymer Bulletin" is a monthly magazine with multiple columns, including a project application guide, outlook, review, research papers, highlight reviews, polymer education and teaching, information sharing, interviews, polymer science popularization, etc. The journal is included in the CSCD Chinese Science Citation Database. It serves as the source journal for Chinese scientific and technological paper statistics and the source journal of Peking University's "Overview of Chinese Core Journals."