摘要
以草酸为催化剂,通过硼酸苯酯法制备了具有优良热稳定性的硼酚醛树脂(BPF)。并通过原位聚合的方式,使甲醛与聚酰胺(PA)6反应生成羟甲基PA后,继续与芳基硼酸酯和剩余甲醛反应,制备出了PA6改性BPF (BPFPA6)。对不同PA6含量的BPF-PA6进行了傅里叶变换红外光谱(FTIR)表征、弯曲及冲击强度测试以及热稳定性分析。结果表明,FTIR谱图显示PA6被成功引入到BPF中,随着PA6含量的增加,BPF-PA6冲击强度呈现先升后降的趋势,且当PA6质量分数为2%时,弯曲强度基本不变,冲击强度达到2.26kJ/m2,相对于BPF提高了15.31%。同时,热重分析表明,当PA6质量分数为2%时,BPF-PA6具有优良的热稳定性,失重10%时的温度为525℃,1300℃时的残炭率达到了65.9%,比BPF树脂高2.7%。通过化学共聚引入PA6,在不影响BPF热稳定性的情况下成功改善了BPF的冲击韧性,达到了预期的效果。
Taking oxalate as catalyzer,boron phenolic resin(BPF)with excellent thermal stability was prepared by method of triphenyl borate.After hydroxymethylation polyamide(PA)was prepared by reaction of PA6 and formaldehyde,the hydroxymethylation PA continued reacting with aryl boronate ester and remaining formaldehyde,and PA modified BPF(BPF-PA6)was successfully prepared in situ polymerization.The structure and properties of BPF-PA6 with different contents of PA6 were studied by FTIR,flexural strength,impact strength and DSC-TG analysis.The results show that,FTIR images prove that PA6 is successfully introduced to BPF.With increasing the content of PA6,the impact strength of BPF-PA6 presents a tendency of increasing first and decreasing in the end.When the mass fraction of PA6 is 2%,the flexural strength has little change,the impact strength reaches 2.26 kJ/m2,increases by 15.31%compared with unmodified BPF.TG analysis shows that the BPF-PA6 with 2%PA6 behaves best thermal stability,and the temperature at 10%of weight loss is 525℃,the char yield reaches 65.9%at 1300℃,which is 2.7%higher than that of unmodified BPF.Through introducing PA6 with chemical copolymerization,the impact toughness of BPF is successfully enhanced without influencing thermal stability and achieves the desired result.
作者
王作堯
彭进
张琳琪
邹文俊
Wang Zuoyao;Peng Jin;Zhang Linqi;Zou Wenjun(School of Material and Engineering,Henan University of Technology,Zhengzhou 450000,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2018年第9期24-28,共5页
Engineering Plastics Application
关键词
硼酸苯酯法
硼酚醛树脂
聚酰胺6
热稳定性
冲击强度
残炭率
method of triphenyl borate
boron phenolic resin
polyamide 6
thermal stability
impact strength
char yield
