This work deals with the development and validation of an on-line infrared spectroscopic set-up for the real time quantification of the melt extrudate during reactive extrusion based processes. The arrangement consists of an infrared spectrophotometer operating in attenuated total reflectance ATR-FTIR, fitted on-line, along the extruder barrel. The setting helps understand the effects of extrusion process parameters and the reaction conversion during development of polymer blends and compound in-processing. The ATR-FTIR spectroscopic probe has been coupled along with an extruder to analyze/understand the process during operation in the MID region of the infrared spectrum. The ATR-FTIR prototype probe was calibrated and validated using off-line measurements. The probe is interfaced to the extruder through to a probe holder unit (PHU), also described herein. The on-line ATR-FTIR measurements were conducted at various locations (L/D) along the length of the extruder. Polymer blends of PP/PA6 in various compositions were investigated and reactive blend of PP-g-AA/PA6 were used to validate the on-line measurements compared to the standard off-line ATR-FTIR analysis.

这项工作涉及在线红外光谱装置的开发和验证，用于在基于反应挤出的过程中实时量化熔体挤出物。该装置包括一个在衰减全反射 ATR-FTIR 下运行的红外分光光度计，在线安装，沿着挤出机机筒。该设置有助于了解挤出工艺参数和聚合物共混物开发过程中反应转化率的影响和加工中的化合物。ATR-FTIR 光谱探头与挤出机结合使用，可在红外光谱的 MID 区域分析/了解操作过程中的过程。ATR-FTIR 原型探头使用离线测量进行校准和验证。探针通过探针支架单元 (PHU) 连接到挤出机，这里也有描述。在线 ATR-FTIR 测量是在沿挤出机长度的不同位置 (L/D) 进行的。研究了各种组成的 PP/PA6 聚合物共混物，并使用 PP-g-AA/PA6 的反应性共混物来验证与标准离线 ATR-FTIR 分析相比的在线测量结果。