Study on Cellulose Acetate Butyrate/Plasticizer Systems South Africa

  • Study on Cellulose Acetate Butyrate/Plasticizer Systems South Africa
  • Study on Cellulose Acetate Butyrate/Plasticizer Systems South Africa
  • Study on Cellulose Acetate Butyrate/Plasticizer Systems South Africa
  • What is cellulose acetate butyrate (CAB)?
  • Introduction Cellulose acetate butyrate (CAB), with the molecular formula of [C 6 H 7 O 2 - (OCOCH 3) X - (OCOC 3 H 7) Y - (OH) 3-X-Y] n, is the most commonly used binder in polymer bonded explosives (PBXs). In the structure of cellulose ester, hydroxyl groups are co-esterified with acetic acid and butyric acid [ 1 ].
  • Can cellulose acetate be used as a plasticizer?
  • Due to their high glass transition temperature, cellulose acetate-based systems are processed when blended with plasticizers. It is thus of utmost importance to study the miscibility and plasticizing effects of various molecules. We prepared CDA films via solvent casting method with diethyl phthalate as the plasticizer.
  • Is secondary cellulose acetate plasticized by diethyl phthalate miscible?
  • We study the miscibility and dynamical properties of secondary cellulose acetate plasticized by diethyl phthalate (DEP). Partial miscibility (characterized by differential scanning calorimetry) is observed above 25 wt% of DEP content. The α-relaxation of the system and its VFT/WLF behavior are studied over a broad frequency range.
  • Do plasticizers migrate out of cellulose acetate?
  • Moreover, plasticizers that migrate out of the material could harm human health and contaminate the environment , . In this regard, understanding the mechanisms of CA plasticization is crucial to find room for improvement in tailoring cellulose acetate properties with a well-designed plasticizer molecule.
  • What causes -relaxation of plasticized cellulose acetate polymers?
  • (Bao, 2015) have assumed that the β-relaxation of plasticized cellulose acetate polymers results from two different contributions: βrelaxation of cellulose acetate rich phase (which correspond to the secondary relaxation of unplasticized CDA) and α'-relaxation of plasticizer rich phase of plasticized CDA (specific to the CDA/plasticizer systems).
  • Are plasticized cellulose acetate systems dielectric?
  • Most of these dielectric studies, however, have been focused on cellulose and its derivatives, and only few results have been reported about dielectric properties of plasticized cellulose acetate systems. Seymour et al., 1979 focused on phthalate plasticizers such as dioctyl phthalate and diphenyl phthalate.

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