Premium
Structure and properties of melt‐stretching polypropylene/silicon dioxide compound microporous membrane
Author(s) -
Cai Qi,
Xu Ruijie,
Chen Xiande,
Chen Changbin,
Mo Haibin,
Lei Caihong
Publication year - 2016
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.23462
Subject(s) - microporous material , materials science , ultimate tensile strength , polypropylene , composite material , membrane , elastic modulus , young's modulus , chemical engineering , chemistry , biochemistry , engineering
To improve the strength and modulus of polypropylene (PP) microporous membrane, the nano‐silicon dioxide (SiO 2 ) was introduced and the influence of SiO 2 content on the structure and properties of initial precursor film and stretched microporous membrane was investigated. It was found that with increasing SiO 2 content to 2%, the crystalline orientation degree of precursor film was decreased from 0.41 to 0.32, but the elastic recovery value did not change much. The mean pore diameter of the stretched microporous membrane was increased from 28.3 to 32.5 nm. The Gurley value (characterizing the air permeability) only decreased from 200 to 194 s. The tensile strength and elastic modulus were increased by 33.3 and 72.0 MPa, respectively. But when the SiO 2 content was 10%, the air permeability of stretched microporous membrane was apparently decreased by 21.5%. Compared with that of microporous membrane without SiO 2 , the tensile strength was increased by only 1.6 MPa. It was concluded that the introduction of 2% content of SiO 2 resulted in the improvement of mechanical properties, at the same time did not deteriorate the pore structure and properties of PP microporous membrane. POLYM. COMPOS., 37:2684–2691, 2016. © 2015 Society of Plastics Engineers