CAJ | 학술논문

研究了在聚丙烯(PP)隔膜表面接枝二乙烯基苯(DVB)/丙烯酸甲酯(MA)交联聚合物网络,提高隔膜高温条件下尺寸稳定性的改性方法。全反射傅立叶红外光谱(ATR-FT-IR)证明 DVB 和 MA 在 PP 隔膜表面发生了聚合反应。考察了接枝共聚合体系中反应时间、反应温度、引发剂浓度等对 PP 隔膜接枝率和耐热性能的影响。在隔膜表面成功接枝 P (DVB-co-MA)的基础上,探索了通过聚合物中 DVB 结构单元上未反应的双键与KH570发生共聚合反应,在隔膜表面引入SiO2粒子的改性方法。用SEM观察膜表面形貌,结果表明Si O 2粒子确实结合到了隔膜中,且该改性方法对隔膜表面孔结构影响不大。热收缩率测试结果表明,改性后膜的尺寸稳定性明显提高,130℃下4 h热收缩率从12%可降低到4%。
연구료재취병희(PP)격막표면접지이을희기분(DVB)/병희산갑지(MA)교련취합물망락,제고격막고온조건하척촌은정성적개성방법。전반사부립협홍외광보(ATR-FT-IR)증명 DVB 화 MA 재 PP 격막표면발생료취합반응。고찰료접지공취합체계중반응시간、반응온도、인발제농도등대 PP 격막접지솔화내열성능적영향。재격막표면성공접지 P (DVB-co-MA)적기출상,탐색료통과취합물중 DVB 결구단원상미반응적쌍건여KH570발생공취합반응,재격막표면인입SiO2입자적개성방법。용SEM관찰막표면형모,결과표명Si O 2입자학실결합도료격막중,차해개성방법대격막표면공결구영향불대。열수축솔측시결과표명,개성후막적척촌은정성명현제고,130℃하4 h열수축솔종12%가강저도4%。
This study was about the surface modification of PP separator by introducing crosslinked divinyl-benzene(DVB)/methyl acrylate(MA)to increase its thermal dimensional stability.The total reflection Fourier transform infrared spectroscopy (ATR-FT-IR)was used to prove that the copolymerization of DVB and MA did occur on the surface.The influences of reaction time,reaction temperature,concentration of initiator on the grafting ratio and thermal properties of PP separator were explored.Furthermore,KH570 was introduced onto the surface by the copolymerization of DVB and KH570 double bonds,by which the SiO2 particles were also in-troduced.The pore structure was observed by SEM.The thermal shrinkage of modified separator reduced a lot than before.The shrinkage at 130 ℃ reduced from 12% to 4% in 4 h.