摘要
采用不同共聚乙烯含量的聚丙烯(PP)为原料,以豆油/DBP(m(豆油)∶m(DBP)=1∶1)为稀释剂,通过热致相分离法制备PP分离膜。并研究了PP的结构类型对膜的微孔结构、孔径和孔径分布及力学性能的影响。研究结果表明:嵌段共聚PP膜表面和内部能形成大量圆形次级微孔,共聚单元含量越高时膜内部的大孔结构越明显;共聚乙烯含量增加时,PP分离膜的平均孔径和孔隙率提高,比面积减小;共聚PP分离膜弹性模量和最大拉伸强度明显低于均聚PP膜,自主合成的均聚Brici PP制备的膜的综合力学性能良好,最大拉伸强度可达到5.23MPa。
Microporous membrane was prepared by thermal induced phase separation method.Polypropylene（PP）with different ethylene content was used as membrane materials.Diluent was soybean oil（SO）/dibutyl phthalate（DBP）mixture（m（SO）∶m（DBP）=1∶1）.The effect of the structure of PP on the structure and performance of membrane including micro-pore structure,average pore size,pore size distribution and mechanical properties were studied.The membrane samples prepared by PP block polymer had a reasonable amount of micro-pores on the membrane surface and in the wall of inner micro-pores.The number of pores with large dimension increased with increasing the content of copolymer unit in PP.Thus the average pore size and the porosity of microporous membrane increased and the surface area decreased.Obviously,the elastic modules and tensile strength of PP membrane prepared with copolymer were smaller than that of homopolymerized sample.Meanwhile,the membrane made with homopolymer Brici PP had excellent mechanical properties,and the max tensile strength was 5.23 MPa.
出处
《化工新型材料》
CAS
CSCD
北大核心
2016年第9期202-204,共3页
New Chemical Materials
关键词
聚丙烯
分离膜
共聚物
结构
性能
polypropylene
separation membrane
copolymer
structure
property
