| abstract |
The invention discloses a siloxane-containing vinyl chloride copolymer and its preparation, a storage battery separator and a manufacturing method thereof. The siloxane-containing vinyl chloride copolymer has a molecular weight of 20,000 to 50,000 and a structure such as Formula (1) shown. The battery separator includes a porous non-woven fabric, the surface of both sides of the non-woven fabric is covered with a layer of copolymer film, the surface of the copolymer film is evenly and densely covered with small holes, and the average diameter of the small holes is 0.1-10 μm; The composition of the copolymer film is siloxane-containing vinyl chloride copolymer or mainly siloxane-containing vinyl chloride copolymer. The siloxane-containing vinyl chloride copolymer is used to prepare battery separators, so that the battery separators have good strength and hydrophilicity. The battery separator prepared by the invention has the characteristics of good wettability, high acid absorption capacity, good flexibility, easy folding, high mechanical strength and good penetration resistance, is suitable for tight assembly, and can effectively improve the service performance of the battery. |