The Synthesis Study Of An Antistatic Agent For High-speed Spinning Finish And Research On The Relationship Between Its Structure And Performance

The antistatic agent for high-speed spinning finish is an important and necessary part in nowadays fiber spinning industry. The new high-speed-high-temperature spinning technics and strict environmental protection policies require a new kind of antistatic agent applied in spinning finish, which may not only have excellent antistatic ability, but also be well heat-resistant, acid-and-alkali-resistant and innoxious. That is also a new tendency in spinning finish research field in the near future.A kind of potassium propylene oxide (PO) - ethylene oxide (EO) block polyether phosphate was synthesized by phosphating reaction with P₂O₅ as phosphorylating reagent, making use of the perfect penetrability and consistent property of block polyether segment to achieve its outstanding applied performance.The synthesis reaction of phosphate was done in this thesis, where the influence of different synthesizing factors such as input material ratio, reaction temperature and time on the composition and properties of outputs was discussed. Thus, the optimum synthesizing condition was found here, namely input material ratio 3 to 1, reaction temperature 67°C, and reaction time 3 hours.The hydrolysis process of the pyrophosphate byproduct, which is brought by phosphating reaction, is also discussed well in this paper and the full hydrolysis condition of pyrophosphate is obtained finally. In addition, the hydrolysis condition of block polyether di-phosphate is discussed and finally it is found that block polyether di-phosphate may not hydrolyze under the hydrolysis condition of pyrophosphate.The influence of the structure of potassium phosphate on the application properties is discussed and the relationship between structure and properties is summarized as follows : Permeability of potassium phosphate formed by isomeric polyether initiatives is prior to that by straight chain polyether initiatives and short chain alcohol formed potassium phosphate displays better than the long chain one. The influence ofPO and EO chain link number of block polyether on permeability of potassium phosphate is minor to initiative structure. In some degree, the more PO chain link the better permeability while the more EO chain link the poorer. As for antistatic ability, the larger potassium phosphate molecular weight the smaller its specific conductance and the poorer its antistatic ability .The structure of poly potassium phosphate plays an important part on it. The lower the ratio of mono- and di- phosphate the better permeability of potassium phosphate and poorer antistatic ability and the higher ratio of mono- and di- phosphate results in better antistatic ability but poorer permeability.