Wang Y.,Northwestern University |
Zhu G.,Northwestern University |
Xie J.,Hebei United University |
Men Q.,No. 5 Gold Geological Party of CAPF |
And 2 more authors.
Journal of Polymer Research | Year: 2014
The poly (styrene-b-butadiene-b-styrene) triblock copolymer (SBS) and linear low density polyethylene (LDPE) were blended to prepare shape memory polymer (SMP), various amounts of short glass fiber (SGF) were filled into SMP to form a novel shape memory SGF/SBS/LDPE composite. The shape memory composites were fully characterized using gel content, mechanical test, dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC) and shape memory behavior. Thermo mechanical experiments resulted that the melting temperature of the developed composites is about 110 °C and SGF has almost no effect on the shape memory transition temperature of the composite. The incorporation of SGF leads to the best overall reinforcing effect in tensile modulus, tensile strength and elongation at break. Full recovery can be observed after only several minutes at different temperatures when SGF content is less than 2.0 wt.%. However, when the SGF content rises to 2.5 wt.%, composites could not full recovery to initial shape. © 2014 Springer Science+Business Media Dordrecht.
Zheng W.-J.,No. 5 Gold Geological Party of CAPF |
Liu X.-H.,No. 5 Gold Geological Party of CAPF |
Chen C.-H.,No. 5 Gold Geological Party of CAPF |
Zhang Y.-X.,No. 5 Gold Geological Party of CAPF
Northwestern Geology | Year: 2010
The Zhaishang deposit is a large gold deposit associated with a small tungsten deposit. Among the 15 tungsten mineralized bodies that have been discovered, six of them are located in the gold ore bodies. There are seven same anomaly areas of gold and tungsten in nine places. The tungsten mineral is mainly scheelite with a small amount of wolframite. The scheelite is also the important gold-bearing mineral and gold is closely related to tungsten. The ore-vein is dominated by the interlayer fractured belts. Ore bodies appear at lithology-flaccid strata just as carbonaceous slate, shale slate, and calcic slate etc. Types of alteration are mainly silicification, pyritization, and then carbonatization, sericitization. Low resistance with high polarization anomalies belt can indicate the mineralization and ore-vein spreading positions. The anomalies of tungsten in water system sediments and soil are all low values along a belt that uniform with the ore-vein as we know at present. The research results and exploration practices have proved that looking for tungsten in gold mineralizing bodies is the simplest way.