Enthalpy relaxation in phosphorus-containing dendrimers
Enthalpy relaxation in phosphorus-containing dendrimers
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DOI：
10.1021/ma011228p
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发表时间：
2002-03-12
期刊：
影响因子：
5.5
通讯作者：
Majoral, JP
中科院分区：
文献类型：
--
作者：
Dantras, E;Dandurand, J;Majoral, JP
一组含磷树枝状大分子涉及五代（g = 1-5）已被研究使用温度调制量热法和标准差示扫描量热技术。树枝状聚合物显示出复杂的玻璃化转变温度与代依赖性。在这种复杂结构的大分子中，已经指出了焓弛豫。研究了物理衰老表现与复杂性增长以及各种冷却的关系。物理老化的热表现强度随世代而降低。
A set of phosphorus-containing dendrimers involving five generations (g = 1-5) has been investigated using temperature-modulated calorimetry and standard differential scanning calorimetric techniques. The dendrimers show a complex glass transition temperature with a generation dependence. Enthalpy relaxations have been pointed out in this complex architecture macromolecule. Physical aging manifestations are studied vs complexity growth, with various cooling. The thermal manifestation intensity of physical aging decreases with generation.