相转变温度（PIT），是指对于某一特定的表面活性剂（如含POE的非离子表面活性剂）-油-水体系，存在着一个较窄的温度范围。
研完了分子链的柔性、分子结构和共轭度对中介相转变温度的影响。
The results showed that the phase transition of model compounds and polymers depend upon molecular structure, conjugated chain and molecular flexibility.
结果表明：PBA替代部分TOBB后，降低聚氨酯相转变温度，中介相温度范围变窄。
The results show that the partial replacement of TOBB by PBA decreased the phase transition temperatures and narrowed the temperature range of mesophase formation.
贝壳中的文石相在结合水和有机质的“调和”作用下，其相转变温度与天然文石相比下降了很多。
With the help of hydration water and organic matrix, the transition temperature of the aragonite in the shell is lower than the natural aragonite.
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