阳离子易染型再生聚酯流变性能研究

Study of Rheological Property of Cationic Easily Dyed Regenerated Polyester

以废旧聚酯纺织品为原料,乙二醇为醇解剂,间苯二甲酸双羟乙酯-5-磺酸钠(SIPE)和聚乙二醇(PEG-1500)为改性单体,经液相聚合得到了阳离子染料易染型再生聚酯(即r-ECDP);对其熔融流变性能进行了测试研究。由样品的红外谱图可知,改性单体SIPE与PEG-1500均已成功引入到共聚酯中并生成了r-ECDP;r-ECDP熔体呈现较明显的假塑性,随着温度和剪切速率(γ)的增加,其表观黏度(η_(a))降低;随着改性单体PEG-1500添加量的增加,r-ECDP熔体的η_(a)也逐渐减小;r-ECDP的非牛顿指数(n)随测试温度升高而逐渐增大;其粘流活化能E_(η)则随剪切速率和PEG-1500添加量的增加而减小;其结构黏度指数(Δη)则随PEG-1500添加量的增加及温度升高,呈减小趋势。

The study prepared used cationic easily dyed regenerated polyester(r-ECDP)by liquid-phase polymerization by taking the post-consumer polyester textile as raw material,ethylene glycolas alcoholysis agent,dihydroxyethyl isophthalate-5-sodium sulfonate(SIPE)and polyethylene glycol(PEG-1500)as modified monomers.And the melt rheological properties of the r-ECDP were studied.The results show that PEG-1500 and SIPE have been successfully incorporated into the polyester in the infrared spectrum and r-ECDP is generated;r-ECDP melt exhibits obvious pseudo-plasticity,and it’s apparent viscosity(η_(a))decreases with the increase of temperature and shear rate(γ).The η_(a) of r-ECDP melt gradually decreases with the increase of the addition of PEG-1500.The non-Newtonian index(n)of the regenerated ECDP gradually increases as the test temperature rise.The viscous flow activation energy(E_(η))of r-ECDP reduces with the increase of shear rate and the addition of PEG-1500.The structural viscosity index(Δη)basically shows a decreasing trend with the increase of PEG-1500 addition and the increase of temperature.