Study on a novel respirable polymer material

制备了一种新型可呼吸高分子材料，该材料在干燥状态下具有高透气性，而在潮湿状态下具有低透气性。1)在过硫酸钾或硝酸铈铵的存在下，将丙烯酸、丙烯酸甲酯和丙烯腈分别聚合在棉织物和铜织物上，得到接枝共聚物，该接枝共聚物将聚丙烯酸衍生物附着在纤维素上，形成纤维素的主链和聚丙烯酸衍生物的分支。2)研究了接枝共聚物的热湿性能。3)在硝酸铈铵存在下，铜织物与丙烯酸甲酯接枝共聚物的水解产物所吸收的水量是其自重的20 ~ 60倍。4)显微观察表明，铜织物接枝共聚物的水解产物因吸水而膨胀，从而封闭织物结构的开口。5)棉、毛、涤纶织物在干、湿状态下的透气量与透气性阻力均呈线性关系。利用这一关系，我们可以评价材料的呼吸性。

A novel respirable polymer material was prepared, which has high air permeability in the dry state and low permeability in the wet state.1) Acrylic acid, methyl acrylate, and acrylonitrile, respectively were polymerized on cotton and cupra fabric in the presence of potassium persulfate or cerium ammonium nitrate to yield a graft copolymer that polyacrylic derivatives were attached to cellulose to give a backbone of cellulose with branches of polyacrylic derivatives.2) Thermal and moisture properties of the graft copolymers were investigated.3) The hydrolysis product of the graft copolymer of cupra fabric with methyl acrylate in the presence of cerium ammonium nitrate uptook from 20 to 60 times as much quantity of water as its own weight.4) The microscopic examination showed that the hydrolysis product of the graft copolymer of cupra fabric swelled out by the uptake of water to close openings of the fabric structure.5) There was a linear relationship between the quantity of air flow permeated and the resistance of air permeability of cotton, wool, and polyester fabric in both dry and wet state. Using the relationship, we can evaluate the respirability of the material.