含氟苯并噁嗪-含硅芳炔改性树脂的制备与性能  

Preparation and Properties of Fluorinated Benzoxazine Modified Si-Containing Arylacetylene Resin

作　　者：张鸿翔 王帆[1] 朱亚平[1] 齐会民[1] ZHANG Hongxiang;WANG Fan;ZHU Yaping;QI Huimin(Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[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其相关技术教育部重点实验室,上海200237

出　　处：《功能高分子学报》2021年第3期284-292,共9页Journal of Functional Polymers

基　　金：中央高校基本科研业务费专项资金(50321041918013,5032104917001)。

摘　　要：采用溶剂法合成了一系列带有活性基团的含氟苯并噁嗪(烯丙基含氟苯并噁嗪(BOZF-1)、苯乙炔基含氟苯并噁嗪(BOZF-2)和炔丙基含氟苯并噁嗪(BOZF-3)),并将其与含硅芳炔树脂(PSA)进行共混改性,研究不同氟苯并噁嗪(BOZF)的结构与质量分数对改性树脂性能的影响。采用差示扫描量热法(DSC)研究BOZF/PSA的固化行为,采用扫描电子显微镜(SEM)观察BOZF/PSA浇铸体断面的微观形貌,采用热重分析(TGA)和动态热机械分析(DMA)研究BOZF/PSA浇铸体的耐热性能和热机械性能,同时还研究了介电性能。结果表明,BOZF的加入使浇铸体断面形貌由光滑平整转变为出现许多微裂纹和韧性断裂带,且能够提高PSA树脂的韧性,浇铸体弯曲强度随w(BOZF)的增加而提高,当w(BOZF-1)=30%时,改性树脂的弯曲强度达到28.1 MPa,比PSA的相应值提高了44.1%。随着BOZF的加入,BOZF/PSA的耐热性能略有下降,介电常数略有上升,介电性能良好。其中BOZF-1/PSA,BOZF-2/PSA,BOZF-3/PSA(w(BOZF)均为10%)在N_(2)气氛下,5%热失重温度(T_(d5))分别为544、604℃和584℃,1000℃下残留率分别为84.4%,89.0%和88.1%。Fluorinated benzoxazines with allyl(BOZF-1),phenyl acetylene(BOZF-2)and propargyl(BOZF-3)were synthesized and used to modify silicon-containing arylacetylene resin(PSA).The effects of the structure and the contents of BOZF on the properties of modified resin(BOZF/PSA)were investigated.The curing behavior of BOZF/PSA resins were studied by differential scanning calorimetry(DSC).The micro-morphology of the blend resin casting was analyzed by Scanning Electron Microscope(SEM).The thermal stability and thermal mechanical properties of the cured BOZF/PSA resin were analyzed by Thermogravimetric Analysis(TGA)and Dynamic Mechanical Analysis(DMA).The dielectric property was also studied.Results showed that the addition of BOZF resins could improve the toughness of PSA resin,and the bending properties of cured products improved with the increase of benzoxazine mass fraction.Among them,the bending strength of modified resin(w(BOZF-1)=30%)could reach 28.1 MPa,which was increased by 44.1%compared with PSA resin.The heat resistance of modified PSA resin decreased slightly with the addition of BOZF resin,the 5%mass loss temperature of the cured resin BOZF-1/PSA,BOZF-2/PSA and BOZF-3/PSA(w(BOZF)=10%)was 544,604℃and 584℃in nitrogen,and their residual rate at 1000℃was 84.4%,89.0%and 88.1%,respectively.With the addition of BOZF,dielectric constant of modified resin was slightly increased,but still maintained a good dielectric performance.SEM showed that the smooth and flat cross-sections turned into tough ones with many cracks and ductile fracture zones,which proved that the modified resin changed from typical brittle fracture to ductile fracture.

关 键 词：含硅芳炔树脂 含氟苯并噁嗪 增韧 力学性能 介电性能 

分 类 号：TB35[一般工业技术—材料科学与工程]