【摘要】：針對聚苯砜(PPSU)樹脂生產(chǎn)流程中純化困難的特點,設(shè)計出一種沉析純化方法,即PPSU在聚合完成后以粉末態(tài)析出,再經(jīng)過純化過程得到高純度的PPSU樹脂。對沉析純化法和傳統(tǒng)粉碎純化法制備的兩種PPSU樹脂進(jìn)行了灰分含量、特性黏度、粒徑、熱穩(wěn)定性等系列對比測試,同時比較了兩種PPSU薄膜的透光率、霧度和拉伸性能。結(jié)果表明,沉析法大幅提高了PPSU的純化效果,其制備的PPSU粉體粒徑更小,產(chǎn)物灰分含量更低;沉析法有利于保證PPSU樹脂分子量和分子鏈結(jié)構(gòu)的完整,其特性黏度比粉碎法PPSU提高了34.5%;由于PPSU樹脂分子結(jié)構(gòu)和組成未變,兩種方法制備的PPSU樹脂熱穩(wěn)定性基本一致;沉析法制備的PPSU薄膜的透光率更高、霧度更低,拉伸性能更好。
[Abstract]:In view of the difficulty in purification of polyphenylsulfone (PPSU) resin, a precipitation purification method was designed, in which PPSU was precipitated in powder state after polymerization and then purified to obtain high purity PPSU resin. The ash content, intrinsic viscosity, particle size and thermal stability of the two kinds of PPSU resins prepared by precipitation purification method and traditional comminution purification method were compared. The transmittance, haze and tensile properties of the two kinds of PPSU films were also compared. The results showed that the purification effect of PPSU was greatly improved by precipitation, and the particle size of PPSU powder was smaller and the ash content of the product was lower. Precipitation method is beneficial to ensure the integrity of molecular weight and molecular chain structure of PPSU resin, and its intrinsic viscosity is 34.555% higher than that of comminuted PPSU. Because the molecular structure and composition of PPSU resin have not changed, the thermal stability of PPSU resin prepared by the two methods is basically the same. The PPSU films prepared by precipitation method have higher transmittance, lower haze and better tensile properties.
【作者單位】： 中橡集團炭黑工業(yè)研究設(shè)計院;四川理工學(xué)院材料科學(xué)與工程學(xué)院;
【分類號】：TQ326.55

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