更多“为什么用作合成纤维的高分子材料都是结晶聚合物,较少使用非晶聚…”相关的问题
第1题
高分子材料的聚集状态有下列三种形式:
A、晶态、部分晶态和非晶态
B、固态、晶态和非晶态
C、固态、非晶态和部分晶态
D、晶态、非晶态和半固态
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第2题
纤维通常是线性结晶聚合物,平均分子量较橡胶和塑料高,纤维不易形变。
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第3题
锦纶、涤纶、腈纶是三大合成高分子材料。
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第4题
Next shows Cu-Ni phase diagram. Describe the phenomena can be observed in the system along with the decrease in temperature from X to Y; Label the solidus line and liquidus line. How to calculate the contents ofliquid and solid phase at point 3? How to calculate the compositions ofliquid and solid phase at T3?
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第5题
Draw the tensile tress-strain diagrams for brittle and ductile materials, respectively. 1) Label plastic region & elastic region; 2) Discuss how to distinguish ductile materials from brittle materials according to three different mechanical properties obtained from tensile stress-strain diagrams? 3) Determine graphically 0.2 percent offset yield strength in the stress-strain diagram.
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第6题
Write out the Gibbs phase rule, and specify the meaning ofthe symbols in it.
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第7题
Write out the chemical reactions for the electrolysis ofwater.
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