The ageing of rigid polyvinyl chloride (R-PVC) aggravated by nitric and sulfuric acids was studied by IR, UV Spectroscopy, thermo-analysis and molecular weight determination.
用红外与紫外光谱法、热分析和分子量测定研究了硬聚氯乙烯在硝酸和硫酸中的老化。
SGK Double-over full automatic belling machine is specially used for belling of PVC pipes. belling type have straight type and R type.
SGK全自动扩口机是处理PVC塑料硬管扩口的设备，扩口方式为直扩口和r扩口两种形式。
TPB with f &r , bone- like belt , is filled with cotton and other textile and has been sucked in PVC liquid , then molded with high temperature .
本厂生产的全塑整芯阻燃输送带是以绵、涤和棉线纺织而成的整体带芯的骨架，浸渍PVC糊体，经高温塑化而成。
The rheological behaviour of the R-PVC can be improved by modification with ROF, which is different from the traditional elastomer-toughening of plastics inregularity and feature.
刚性有机粒子使共混 物流变行为变佳， 挤出 物外观改善，显示出与传统的弹性体增韧改性不同的规律及特色。
The rheological behaviour of the R-PVC can be improved by modification with ROF, which is different from the traditional elastomer-toughening of plastics inregularity and feature.
刚性有机粒子使共混 物流变行为变佳， 挤出 物外观改善，显示出与传统的弹性体增韧改性不同的规律及特色。
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