增塑聚乳酸的熱-機(jī)械性能表征(編輯修改稿)
2025-06-18 12:02 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 e to slow crystallization of PEG. ? Others: fatty acid ester is a good plasticizer with a strong hindrance of the crystalline phase development. 2. Materials and methods Materials ? PLA 4042D: ? PBOH: ? DBS: ? PEGs: ? AGM: Blending conditions ? Machine: An opened mixer (Brabender, 50 EHT) controlled by a labStation driven by the BRABENDER Software Winmix. ? Conditions: Blending temperature was 180℃ and blending time 15 min and blade rotation speed was 30 rpm. ? Sample: 20*20* cm3 . Differential scanning calorimeter ? Machine: Perkin–Elmer Pyris DSC。 Pyris V software under Windows NT for data collection. ? Calibration: Indium and Tin。 temperature range [+15 to +350℃ ]. ? Pretreatment: Heated to 200℃ for 5 min. ? Precision: 177。 ℃ . . Mechanical measurements ? Machine: MTS Synergie RT1000 ? Loading speed: 1 mm/min for pure PLA and 10 mm/min for plasticized PLA. 3. Results and discussion 馬悅欣 08S007033 ? Solubility parameter calculation 溶度參數(shù)的計(jì)算 ? Thermal analysis of miscibility 熱分析 ? Mechanical properties 機(jī)械性能 Solubility parameter calculation 溶解度參數(shù)的計(jì)算 為了估計(jì)兩種分子的兼容性 ， 有幾種方法可以用于計(jì)算溶度參數(shù) ， 本文采用 Hoy法 計(jì)算參數(shù) δ。 溶度參數(shù)的確定基于平均分子量 。 Interaction parameter (相互作用參數(shù) ) χ由等式 （ 1）計(jì)算得到： BRTV ??? 2211 )( ???(1) B是一個(gè) ~，符合 entropic ponent ，通常非極性體系采用 熵 ？ Table 2 Solubility parameter δ and interaction pa
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