CAJ | 학술논문

以带双硫酯取代基聚醚醚酮为大分子链转移剂,采用可逆加成-断裂链转移自由基聚合( RAFT)法合成不同接枝率的磺化聚醚醚酮( g-SPEEK),并对其结构进行表征.在单体/链转移剂/引发剂的投料比(摩尔比)为50：4：1,温度为70℃,反应24 h,得到聚合物膜的离子交换容量和吸水率分别为1.312 mmol/g和43.51%,其溶胀率为5.05%,低于Nafion膜的11.50%.热重分析( TGA)结果表明该梳型g-SPEEK具有较好的热力学稳定性,且该聚合物膜具有与 Nafion 膜相当的抗氧化性.在相同的离子交换容量下,梳型g-SPEEK比主链型SPEEK具有更好的H+离子透过性能.
이대쌍류지취대기취미미동위대분자련전이제,채용가역가성-단렬련전이자유기취합( RAFT)법합성불동접지솔적광화취미미동( g-SPEEK),병대기결구진행표정.재단체/련전이제/인발제적투료비(마이비)위50：4：1,온도위70℃,반응24 h,득도취합물막적리자교환용량화흡수솔분별위1.312 mmol/g화43.51%,기용창솔위5.05%,저우Nafion막적11.50%.열중분석( TGA)결과표명해소형g-SPEEK구유교호적열역학은정성,차해취합물막구유여 Nafion 막상당적항양화성.재상동적리자교환용량하,소형g-SPEEK비주련형SPEEK구유경호적H+리자투과성능.
A series of comb-like sulfonated poly( ether ether ketone) ( g-SPEEK) with well-defined structures was prepared via reversible addition-fragmentation chain transfer( RAFT) polymerization using PEEK contai-ning dithiobenzoate as macro RAFT agent and sulfonated styrene(SST) as monomer. The graft rate, chain length and molecular structure were tailored by the molar ratio of SST to RAFT agent and the reaction time of RAFT. The membranes of g-SPEEK were prepared by solution cast. The mixture solvent of water and NMP was used to adjust the membrane morphology. The structure and morphology of g-SPEEK membrane were cha-racterized by Fourier transform infrared spectroscopy( FTIR) , 1 H NMR, TGA and scanning electron microsco-py( SEM) . The synthesized g-SPEEK have high hydrophilic/hydrophobic phase separation. With the increase in grafting degree of StSO3 Na, the ion exchange capacity ( IEC ) and water content increase from 0.638 mmol/g to 1.312 mmol/g and 20.19% to 43.51%, respectively. However, its swelling ratio is 5.05% which is lower than that of Nafion membrane(11.50%) . Otherwise, comb-shaped SPEEK has a better H+ permea-bility than main-chain SPEEK membrane with the same IEC value.