摘要
氰酸酯存在加工性较差以及质脆等问题,不利于载体胶膜的制备且影响最终的黏结性能。为此,采用苯氧基树脂与蒙脱土增韧改性双酚A型氰酸酯树脂,并将其与玄武岩纤维复合,制备改性氰酸酯树脂载体胶膜。对改性树脂的工艺性和固化行为进行测试分析,苯氧基树脂改性后的氰酸酯具备良好的成膜性以及低的固化温度,适用于载体胶膜的制备。纯氰酸酯树脂载体胶膜的黏结强度为11.1 MPa,单独使用蒙脱土与苯氧基树脂增韧的氰酸酯载体胶膜的黏结强度分别为12.7 MPa和13.0 MPa,分别提升14.4%和17.1%。质量分数10%的苯氧基树脂和质量分数2%的蒙脱土协同增韧的树脂载体胶膜黏结效果最佳,黏结强度达到13.7 MPa,提升23.4%。此外,热性能与介电性能表征显示,复合材料的热失重5%温度为396.0℃,玻璃化转变温度为240.7℃,介电常数和介电损耗分别为3.2和0.04。制备的载体胶膜具有优异的黏结强度、热稳定性和介电性能,可作为雷达罩的耐高温透波黏接材料。
Cyanate esters suffer from poor processability and brittleness,which are detrimental to the preparation of carrier adhesive films and affect the final bonding performance.To address these issues,bisphenol A cyanate ester resin was toughened and modified with phenoxy resin and montmorillonite,and then combined with basalt fiber to fabricate the modified cyanate ester resin carrier adhesive film.The processability and curing behavior of the modified resin were tested and analyzed.The cyanate ester modified with phenoxy resin exhibited good film-forming properties and a low curing temperature,making it suitable for the preparation of carrier adhesive films.The bonding strength of the pure cyanate ester resin carrier adhesive film was 11.1 MPa.The bonding strengths of the cyanate ester carrier adhesive films toughened solely with montmorillonite and phenoxy resin were 12.7 MPa and 13.0 MPa,respectively,representing an increase of 14.4%and 17.1%.The resin carrier adhesive film toughened with a combination of 10%mass fraction of phenoxy resin and 2%mass fraction of montmorillonite achieved the best bonding effect,with a bonding strength of 13.7 MPa,an increase of 23.4%.Additionally,the thermal and dielectric properties characterization showed that the composite material had a 5%weight loss temperature of 396.0℃,a glass transition temperature of 240.7℃,and a dielectric constant and dielectric loss of 3.2 and 0.04,respectively.The prepared carrier adhesive film has excellent bonding strength,thermal stability,and dielectric properties,making it suitable as a high-temperature-resistant and transparent bonding material for radomes.
作者
张甜甜
尹启晨
强军锋
ZHANG Tiantian;YIN Qichen;QIANG Junfeng(College of Materials Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China;School of Chemical Engineering and Technology,Xi'an Jiaotong University,Xi'an 710049,China)
出处
《塑料科技》
北大核心
2025年第9期8-14,共7页
Plastics Science and Technology
基金
国家自然科学基金(51873171)。
关键词
载体胶膜
氰酸酯树脂
苯氧基树脂
增韧
黏结强度
Carrier adhesive film
Cyanate ester resin
Phenoxy resin
Toughening
Bond strength
