由DSC 的熔融焓中發現PTFE 在1×10^7 以下的分子量其結晶度隨分子量上升而提高,1×10^7 以上的分子量結晶度卻是隨分子量上升而逐漸遞減,並由DMA 的分析結果推論PTFE 間有Branch的存在,故推測在1×10^7 以上的分子量的PTFE 聚合過程中,產生較多支鏈的行為,造成DSC檢測時其結晶度有隨分子量的提升而下降的現象,在流變儀觀測中發現,PTFE 的黏度介於1000~1400Pa‧s,PTFE 黏度隨溫度的升高而緩慢升高,呈現熱穩定的狀況,且從DSC 與DMA的結果中觀測到約在350℃有熔融峰,但在流變過程中其儲存模數仍大於損耗模數,故推估在巨觀表現上PTFE 有很高的熔融黏度。
According melting enthalpy found the when PTFE molecular weight less than 10^7 its degree of crystallinity increase with the molecular weight rises, when PTFE molecular weight more than 10^7 its degree of crystallinity decrease with the molecular weight rises. From the result of DMA analysis, we infer the existence of the branch between PTFE. It is presumed that the PTFE molecular weight more than 10^7 in the polymerization process to produce more branched, resulting in the degree of crystallinity decrease with the molecular weight rises. Rheological analysis found that the viscosity of PTFE is between 1000 ~ 1400Pa.s, PTFE viscosity with increasing temperature slowly rises, showing a thermally stable condition. But in the course of its rheological storage modulus is still greater than the loss modulus, it is reckoning on a macroscopic performance PTFE has a high melt viscosity.