Papers by Author: Bing Du

Abstract: Phthalazinone structure contained phthalaazione ether sulfone ketone (PPESK) is a kind of excellent engineering plastic with high temperature resistance and resolvability. In this paper, SC-CO₂ was used as foaming agent to prepare PPESK foams by temperature rising method. The influence of technological conditions like foaming time, foaming temperature and saturation pressure on cell density and cell morphology was discussed and analyzed.

Abstract: Aiming at influencing factors in the abominable natural environment in permafrost district of Qinghai-Tibet railway, according to different requirements on concrete’s durability performance which exerted by different climatic conditions and different environment of Qinghai-Tibet railway, the design and the construction on site of durable concrete was investigated.