摘要
通过改变含磷单体4,4＇-二氟二苯苯磷氧（BFPPO）与4,4＇-二氟二苯甲酮（DFK）的摩尔比,在碱催化条件下与酚酞缩聚成功合成了一系列不同磷含量的聚芳醚/聚芳醚酮共聚物.含磷共聚物分子主链存在大分子侧基及扭曲的非平面结构使其可以很好的溶解于DMF、DMSO等多种有机溶剂.通过FTIR,31P-NMR,1HNMR及13C-NMR测试表征了共聚物的分子结构,GPC测定共聚物的分子量及其分布.DSC测试表明,随着BFPPO含量的增大,共聚物的玻璃化转变温度呈线性增加,最高为270℃.含磷共聚物具有良好的热稳定性和机械性能：空气氛围下5%热失重温度为494~498℃,薄膜拉伸强度高达95 MPa,断裂伸长率为6.1%~9.0%.共聚物薄膜的垂直燃烧测试为UL94 VTM-0级,极限氧指数（LOI）最高能达到50%,具有优异的阻燃性能.
A series of phosphorus-containing poly （arylene ether）/poly （arylene ether ketone） copolymers were synthesized by the nucleophilic substitution through changing the molar ratio of bis （4-chlorophenyl） phenyl phosphine oxide （BFPPO） and 4,4＇-difluoro diphenylmethanone （DFK）. The copolymers with large side groups,twisted and noncoplanar conformation were readily soluble in a variety of organic solvents,such as DMF,DMSO and so on. The structure of the copolymers was confirmed by FTIR,3~P-NMR,1H-NMR and ~3C- NMR. The molecular weight and its distribution of copolymers were also investigated by GPC. Furthermore,the DSC test revealed that the glass transition temperature of the copolymers increased linearly with the BFPPO content increasing and the maximum can reach 270 ~C. Experimental results indicated that the polymers had good thermal stability,with the temperature at 5% weight loss of 494 ~ 498 ℃ and CRs00 of 5.3% ~ 11.8% at air atmosphere. Moreover,the copolymer films showed good mechanical properties with tensile strength of 74 95 MPa, tensile modulus of 2.3 -2.6 GPa and elongation at break of 6.1% ~ 9.0%. It was concluded that the polymers which kept good thermodynamic properties exhibited outstanding flame retardance due to the existence of triphenylphosphine-oxide moieties in the main chain. The UL94 of the copolymer films reached VTM-0 grade and the LOI values were up to 50% significantly.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2016年第4期449-456,共8页
Acta Polymerica Sinica
关键词
聚芳醚酮
苯膦氧
阻燃
含磷聚合物
PolymersPolyetherketoneketone, Phenylphosphine oxide, Flame-retardant, Phosphorus-containing
