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摘要
以邻苯二甲酸和二乙二醇为原料,苯磺酸为催化剂,制备了含有酯骨架和羟基结构的聚邻苯二甲酸一缩二乙二醇酯二醇(DPAP),通过傅里叶变换红外光谱仪、核磁共振氢谱仪对其分子结构进行表征,结果表明DPAP达到预期分子结构并成功合成。以DPAP、苯酚、多聚甲醛为原料,氢氧化钠为催化剂,制备改性酚醛树脂,通过傅里叶变换红外光谱仪对改性酚醛树脂进行表征,结果表明DPAP引入了酚醛树脂分子结构。对酚醛树脂进行发泡、固化得到改性酚醛泡沫,对改性酚醛泡沫的韧性、导热系数、泡孔结构和机械强度进行了测试。结果表明,改性酚醛泡沫韧性明显提高,弯曲位移提高了115%,同时导热系数和压缩强度都得到改善,导热系数降低了34.6%,压缩强度提高了102%。
Abstract
Poly (phthalate diethylene glycol ester glycol) (DPAP) with the structure of ester skeleton and hydroxyl group was prepared by using phthalic acid and diethylene glycol as raw materials and benzene sulfonic acid as catalyst.The molecular structure of the DPAP was characterized by FT-IR and 1H-NMR.The results showed that the DPAP reached the expected molecular structure and was successfully synthesized.The modified phenolic resin was prepared by using the DPAP,phenol and paraformaldehyde as raw materials and sodium hydroxide as catalyst.The modified phenolic resin was characterized by infrared spectrum.The results showed that the DPAP was successfully introduced in the molecular structure of phenolic resin.The modified phenolic foam(PF) was prepared by foaming and curing.The toughness,heat resistance,pore structure and mechanical strength of the modified PF were tested.The results showed that the toughness of the PF increased significantly,the bending displacement increased by 115%,the thermal conductivity and compressive strength were improved,the thermal conductivity decreased by 34.6%,and the compressive strength increased by 102%.
关键词
聚邻苯二甲酸一缩二乙二醇酯二醇
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酚醛泡沫
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增韧
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导热系数
Key words
poly (phthalate diethylene glycol ester glycol)
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phenolic foam
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toughening
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thermal conductivity
DPAP改性酚醛泡沫性能研究[J].
化工新型材料, 2022, 50(8): 130-134 DOI:10.19817/j.cnki.issn1006-3536.2022.08.025
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基金资助
辽宁省重点研发计划指导计划(2017304004)
