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首页> 外文期刊>Journal of Applied Polymer Science >The preparation and thermomechanical properties of high-temperature foams based on thermoplastic poly(phthalazinone ether ketone)
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The preparation and thermomechanical properties of high-temperature foams based on thermoplastic poly(phthalazinone ether ketone)

机译：基于热塑性聚（酞菁醚酮）的高温泡沫的制备及热机械性能

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摘要

Poly(phthalazinone ether ketone) (PPEK) is an amorphous thermoplastic polymer with a high glass transition temperature(T-g)exceeding 250 degrees C. We describe the preparation of foams from PPEK and characterize their properties. PPEK foams were prepared using dichloromethane as a foaming agent. The foaming agent was swollen into discs of the PPEK, which were then foamed by heating. Foams could be prepared at temperatures far below theT(g)of the PPEK due to plasticization of the polymer by the foaming agent. Foams with densities ranging from 0.1 to 0.65 g/cm(3)were prepared. Their thermal conductivity and modulus (measured approximately by indentation tests) were found to decrease with density, and the trends were similar to those expected from existing models. The foams could be annealed at 200 degrees C without collapse suggesting that they may be useful in structural or insulation applications where stability at high temperature is essential.
机译：聚邻苯二甲嗪酮醚酮（PPEK）是一种无定形热塑性聚合物，其玻璃化转变温度（T-g）超过250摄氏度。我们描述了从PPEK制备泡沫并对其性能进行了表征。以二氯甲烷为发泡剂制备了PPEK泡沫。发泡剂膨胀成PPEK的圆盘，然后加热发泡。由于发泡剂对聚合物的塑化作用，可以在远低于PPEK的温度下制备泡沫。制备了密度在0.1到0.65g/cm（3）之间的泡沫。发现它们的热导率和模量（通过压痕试验近似测量）随着密度的增加而降低，其趋势与现有模型的预期趋势相似。泡沫可以在200摄氏度下退火而不会坍塌，这表明它们在高温稳定性至关重要的结构或绝缘应用中可能有用。

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