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首页> 外文期刊>Journal of Applied Polymer Science >Solid-state 13C nuclear magnetic resonance study of cured, unsaturated polyester resins
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Solid-state 13C nuclear magnetic resonance study of cured, unsaturated polyester resins

机译：固化的不饱和聚酯树脂的固态13C核磁共振研究

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摘要

The styrene sequence distributions and amount of reacted fumarate units in cured, unsaturated polyester resins were studied by solid-state 13C nuclear magnetic resonance. Increasing the styrene content and molar ratio of styrene to the double bonds, in the polyester chain increased the amount of diad and n-ad sequences and decreased the amount of monad sequences. At the same time, the amount of reacted fumarate units increased. The glass transition temperature was almost constant for resins with the same composition but different styrene contents. Changing the composition affected the glass transition temperature, which could not be detected for highly crosslinked resins. The mechanical properties were improved with increasing styrene content.
机译：通过固态13 C核磁共振研究了固化的不饱和聚酯树脂中苯乙烯的序列分布和富马酸酯单元的反应量。在聚酯链中，增加苯乙烯含量和苯乙烯与双键的摩尔比，可增加二元和n-ad序列的数量，并减少二元序列的数量。同时，富马酸酯单元的反应量增加。对于组成相同但苯乙烯含量不同的树脂，玻璃化转变温度几乎恒定。改变组成会影响玻璃化转变温度，这对于高度交联的树脂是无法检测到的。随着苯乙烯含量的增加，机械性能得到改善。

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