We have investigated polymerization-induced phase separation (PIPS) of epoxy solution in oligoethylene glycol (PEG200) using time resolved small-angle X-ray scattering (SAXS). To control the characteristic length or the pore size, especially to realize the nanometer characteristic length, we have investigated the structure formation process as a function of the fractions of crosslinking agent (curing agent) and oligoethylene glycol. It was found that the effects of the crosslinking agent fraction on the characteristic length was small, but those of the oligoethylene glycol fraction were so largetoreducethecharacteristic length down to 12.6 nm. The structural origin of the characteristic length was not assigned to structure due to the PIPS, but some structure originally existing in epoxy solution in PEG200 fixed by the crosslinking reaction.

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The ornamental gold silk is a special kind of costly silk fabrics, and it is considered to have a long history in ancient China. This study investigated the origin of the ornamental gold silks and the corresponding gold-decoration techniques, and offered an earlier time for the origin of the ornamental gold silk. Moreover,different gold-decoration techniques were summarized in three categories, i.e. the gold foil method, gold thread method and gold powder method, based on the shape of the processed gold materials. According to the analysis of the complexity of the three techniques, it confirmed that the gold powder method and the gold foil method predated the appearance of the gold thread method, and a query about the existing timeline of gold foil method and gold powder method was proposed.

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The sanded surfaces of rice straw particleboards were coated with shell-simulated coating, marbletexture-simulated coating at 25̊C and 75% relative humidity. The properties of gloss, hardness, adhesion,yellowing resistance, and hand-feel were examined. Although the crackle-simulated coating had relatively poor hardness, adhesion, and durability compared with the other special coatings, its decorative appearance was the best. On the other hand, flash and shell-simulated coatings showed better durability but relatively poor decorative qualities. Based on these results, rice straw particleboard coatings are discussed.

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