【摘要】 以甘油/无水乙醇为沉析剂,通过沉析法制备聚对苯二甲酸乙二醇酯(PET)沉析纤维,采用纤维形态分析仪、扫描电镜、X射线衍射仪、接触角测定仪和差示扫描量热仪对1 000~7 000 r/min不同转速下PET沉析纤维的长度、表面形态、结晶特性等性能进行了研究。结果表明:随着转速的增大,PET沉析纤维粘结现象减少,固化形成的纤维主要呈飘带状,形态柔顺,当转速大于3 000 r/min,纤维直径为0.5~4.0μm;增大转速,纤维整体的长度减小,重均长度小于1.0 mm的沉析纤维所占比例为77.4%~98.9%;提高转速,沉析纤维的亲水性变好,其相应的结晶度和熔融温度增大;当转速为7 000 r/min时,PET沉析纤维的结晶度为39.9%,熔融温度为250.8℃,与水的接触角为61.7°。更多还原

【Abstract】 A polyethylene terephthalate( PET) fibrid was prepared by using glycerol/anhydrous alcohol as a precipitant through precipitation. The length,surface morphology and crystalline characteristics of PET fibrid were studied at the rotating speed of 1000-7 000 r/min with fiber quality analyzer,scanning electron microscope,X-ray diffractometer,static contact angle instrument,differential scanning calorimeter. The results showed that the adhesion of PET fibrid was decreased with the increase of the rotating speed,and the fibrid was ribbon-like in shape and soft in handle after solidification; the fibrid diameter was 0. 5-4. 0μm as the rotating speed was above 3 000 r/min; the total length of fibrid was decreased while raising the rotating speed,and the fibrid with the weight average length less than 1. 0 mm accounted for 77. 4%-98. 9%; the hydrophilicity of the fibrid was improved and the crystallinity and melting temperature were increased while elevating the rotating speed; and the crystallinity of the PET fibrid was 39. 9%,melting temperature 250. 8 ℃,and water contact angle 61. 7° as the rotating speed was 7 000 r/min.更多还原