INTRODUCTION Epoxy resin contains two or more epoxy polymers composed mainly of aliphatic, alicyclic or aromatic chain segment. Epoxy resin is a useful thermosetting product for polymer oligomer formation by the reaction of epoxy groups with liquid and exclusion of thick and solid-state varieties, among other forms. Although most of types of epoxy resins are utilized at room temperature, the liquid itself is a thermoplastic linear polymer. It almost did not separate the use of value at room temperature or heated conditions, the epoxy oligomers and curing agent reactions cross-linked into three-dimensional network structure of insoluble and infusible polymer. its inherent excellent performance. Epoxy resin is most commonly used in the aerospace, aviation and defense sectors as a thermosetting polymer due to its strong bonding ability, excellent electrical insulating, processing and chemical properties and good stability. It is widely used in coatings, adhesives, electrical and electronic devices, wood construction, composite materials and many other fields 1-3. Cured pure epoxy resin has high crosslinking density thus, it is brittle, fatigue-resistant, heat-resistant and has impact toughness. However, it also presents several disadvantages, including failure to meet requirements and the fact that epoxy application is subject to certain restrictions. As such, many studies hava sought to determin methods by which modification of the toughness epoxy resin could be achieved 4-7. EXPERIMENTAL The materials used in the experiment are presented in Table-1.
Kashgar, located in China’s far west, has a typical hot-arid climate. There are a large number of low-rise high-density Islamic housing in Kashgar old City. The thermal comfort in these buildings has not yet been adequately researched. In order to obtain a comprehensive understanding about the real indoor thermal environment and the residents’ summer thermal comfort in Kashgar old City, a field investigation of 138 residential buildings was conducted in the summer time, including onsite environmental parameter measurements and simultaneous surveys using subjective thermal comfort questionnaires. Based on a statistical regression analysis of 182 valid questionnaires, a summer thermal comfort model was established. The results show that the measured summer neutral temperature of the local people is 23.4°C, and the upper limit of acceptable summer temperature for 80% of the residents is 26.9°C. The summer thermal tolerance of the residents in the Kashgar old City is lower than expected and also lower than that of the residents in rural Turpan with the same climate features. The survey also shows that the residents in the Kashgar old City have a habit of transfering living spaces over time, and the frequency of passive behaviours is higher than those of active behaviours. The above results are believed to be potentially valuable for the revision of energy conservation policies and the design practice of residential buildings in the hot-arid climate region of China, and also for areas under similar climate conditions in the world.
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