介绍了传统的PET SSP生产技术,包括间歇法和连续法SSP的生产工艺,对不同垂直式连续SSP进行了比较。对杜邦NG3的缩聚SSP生产技术的生产流程、工艺和应用情况进行了说明。重点介绍了M&G公司的SSP最新技术——Easy UP,窑式SSP。介绍了...介绍了传统的PET SSP生产技术,包括间歇法和连续法SSP的生产工艺,对不同垂直式连续SSP进行了比较。对杜邦NG3的缩聚SSP生产技术的生产流程、工艺和应用情况进行了说明。重点介绍了M&G公司的SSP最新技术——Easy UP,窑式SSP。介绍了该技术的工艺流程、工艺原理和特点,与其他反应器比较的优势。指出Easy UP PET SSP生产技术是PET固相增黏技术的新进展。展开更多
Dual endotherms during differenUal scanning calorimetric (DSC) measurement occur when dried PET pellets are pretreated with solld state polyeondensation (SSP) at 215-230℃ for appropriate holding, times. The two endot...Dual endotherms during differenUal scanning calorimetric (DSC) measurement occur when dried PET pellets are pretreated with solld state polyeondensation (SSP) at 215-230℃ for appropriate holding, times. The two endothermic fusion peaks arise from melting and recrystallization, taking place during scanning in the calorimeter,of imperfect crystals initial present in sample. The lower temperature peak appears higher than the SSP reaction temperature for 5-20℃ accordingly and linear relaflonship with SSP reaction temperature, logarithmic linear relationship vs. SSP reaction time, while the position of higher temperature peak nearly does not change. The higher the SSP reaction temperature, the larger the total area of the endotherms, namely, the higher crystallinity. For 4 reaction temperatures the crystallinity show logarithmic linear relationship vs, SSP reaction time.展开更多
文摘介绍了传统的PET SSP生产技术,包括间歇法和连续法SSP的生产工艺,对不同垂直式连续SSP进行了比较。对杜邦NG3的缩聚SSP生产技术的生产流程、工艺和应用情况进行了说明。重点介绍了M&G公司的SSP最新技术——Easy UP,窑式SSP。介绍了该技术的工艺流程、工艺原理和特点,与其他反应器比较的优势。指出Easy UP PET SSP生产技术是PET固相增黏技术的新进展。
文摘Dual endotherms during differenUal scanning calorimetric (DSC) measurement occur when dried PET pellets are pretreated with solld state polyeondensation (SSP) at 215-230℃ for appropriate holding, times. The two endothermic fusion peaks arise from melting and recrystallization, taking place during scanning in the calorimeter,of imperfect crystals initial present in sample. The lower temperature peak appears higher than the SSP reaction temperature for 5-20℃ accordingly and linear relaflonship with SSP reaction temperature, logarithmic linear relationship vs. SSP reaction time, while the position of higher temperature peak nearly does not change. The higher the SSP reaction temperature, the larger the total area of the endotherms, namely, the higher crystallinity. For 4 reaction temperatures the crystallinity show logarithmic linear relationship vs, SSP reaction time.
