文献类型：期刊文献

中文题名：芳基二炔丙基醚改性含硅芳炔树脂的性能

英文题名：Properties of Aryl Dipropargyl Ether Modified Silicon-Containing Arylacetylene Resin

作者：董斯堃[1];袁荞龙[1];黄发荣[1]

机构：[1]华东理工大学材料科学与工程学院特种功能高分子材料及相关技术教育部重点实验室

年份：2019

卷号：45

期号：3

起止页码：411

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：中央高校基本科研业务费专项资金(222201817001)

语种：中文

中文关键词：芳基二炔丙基醚;含硅芳炔树脂;改性;热性能;力学性能

外文关键词：aryl dipropargyl ether;silicon-containing arylacetylene resin;modification;thermal property;mechanical property

摘要：合成了4,4'-双酚芴二炔丙基醚(DPO-BPF)和4,4'-二苯醚二炔丙基醚(DPO-BPE),将两种芳基二炔丙基醚与含硅芳炔(PSA)树脂通过溶液和熔融法制得改性的 PSA。对改性 PSA 树脂的固化反应、树脂浇铸体的热稳定性和力学性能进行了研究。结果表明:相比于 PSA 树脂,加入两种芳基二炔丙基醚改性的 PSA树脂的固化反应起始温度变化小,固化反应峰值温度升高。改性 PSA树脂在氮气中的热稳定性随加入芳基二炔丙基醚质量分数的增加而下降,30%(质量分数)的DPO-BPF改性PSA树脂固化物在氮气中5%热失重温度(Td5)为559 ℃,800 ℃残留率为87%。DPO-BPE和DPO-BPF改性PSA树脂浇铸体的力学性能高于纯PSA树脂浇铸体的力学性能,20%(质量分数)DPO-BPE改性PSA树脂浇铸体的弯曲强度和冲击强度可达51.6 MPa和5.2 kJ/m2,分别比纯PSA树脂浇铸体的相应值增加了137%和136%;动态热力学分析可知改性后PSA树脂浇铸体在500 ℃内未发现玻璃化转变。改性PSA树脂力学性能显著提高,耐热性能优异,可用作耐热、结构一体化轻质材料。
Light integrated materials bearing heat-resistant structures can be used in the field of aerospace crafts and high-speed transport vehicles, leading to low weight and high transportation efficiency. To achieve this goal, light and highly heat-resistant resin matrices have been required to be designed and prepared. Poly(siliconcontaining arylacetylene)(PSA) is a kind of novel thermosetting resins with many fascinating characteristics such as high thermal stability and ablative resistance. Nevertheless, the mechanical properties of the typical PSA resin are poor. To improve the mechanical properties of the light and highly heat-resistant PSA, two aryl dipropargyl ethers, 4,4 ’-diproparyloxy bisphenol fluorene (DPO-BPF) and 4,4 ’-diproparyloxy biphenyl ether (DPO-BPE) were synthesized and used to modify PSA through solution and melting processes. The curing reaction, thermal property and mechanical property of the two aryl dipropargyl ethers modified silicon-containing arylacetylene resin were studied. The results indicated that the peak temperatures of the modified PSA resins were increased, and the initial temperatures of the modified PSA resins were slightly changed compared with pristine PSA resin during curing. The thermal stability in nitrogen of the cured modified PSA resins was reduced with addition of the two aryl dipropargyl ethers. For the PSA resin containing 30% mass fraction of DPO-BPF, the temperature for 5% weight loss and the residual yield at 800 ℃ were 559 ℃ and 87%, respectively. The mechanical properties of the PSA resins modified with DPO-BPE and DPO-BPF were enhanced obviously. As a comparison with PSA, the flexural strength and impact strength the PSA modified with 20% mass fraction of DPO-BPE could reach 51.6 MPa and 5.2 kJ/m2, increased by 137% and 136%, respectively. The dynamic thermal mechanical analysis showed that no glass transition temperature was observed for the cured PSA and modified PSA resins before 500 ℃. The PSA resin modified by 4,4 ’-diproparyloxy biphenyl ether is a promising matrix that can be used as a kind of light, heatresistant and structural material.