No abstract

After the primary exploration of the preparation procedure of phenolic foam, we studied the modification of phenolic foam by graphene oxide. According to our researches we found that the influence of modifier to the percentage of close area was very little, but it can greatly decrease the thermal conductivity of phenolic foam. In this way, phenolic foam thermal conductivity can be reduced to 0.025 W/m.K.

Phenolic foam offer a multitude of advantage for energy saving and fire, however, they are brittleness and need to be improved. Nanostructured inorganic particles are good modifiers to enhance the toughness, but the problem is that inorganic particles have poor compatibility with polymer materials. To solve this problem, here SiO2and Poly acrylic acid (PAA) hybrid nanoparticles were used as a reinforcing agent, which were prepared by silica sol and polyacrylic acid. The analysis shows that the hybrid nanoparticles effectively improve the compressive strength, the compressive strength and cell structures.

In this paper, performance characteristics of and synthesis processes for monocomponent polyurethane waterproof coatings are introduced in detail. The effects of molar ratio of NCO/OH, mass ratio of N220/330N, and content of the NCO group, as well as the performance impact of dibutyl phthalate (DBP) are discussed. In addition, common defects in monocomponent polyurethane waterproof coatings and their prevention methods are also discussed. On the basis of the discussion presented, it can be concluded that great attention should be paid to common defects in paint production and paint application so that they can be prevented before their occurrence. Such prevention can guarantee the perfect facade of coating decoration.

This paper introduces the composition, function, system construction and construction technology of ACF Inorganic Fibers Wool Board External Thermal Insulation System (Abbreviation: ACF System), and also evaluated its properties. Results showed that all the performance indexes of this system meet the requirement of company standard. The good effect has been achieved in its application in energy-efficient retrofit in existing building of Xicheng District, Beijing. It demonstrates that the ACF System not only satisfies the building energy efficiency requirements but also owns a good fire resistance property as a new building fire-resistant insulation system. It possesses a prospect market and extending significance.