A plasticizer index to universally correlate the normalized work of fracture and elastic modulus of plasticized cellulose triacetates. (5th October 2015)

• Record Type: Journal Article
• Authors: Azadimanesh, Farzaneh; Mohammadi, Naser
• Is Part Of: Carbohydrate polymers. Volume 130(2015)
• Page Start: 316
• Page End: 324
• Publication Date: 2015-10-05
• Subjects: Plasticizer index -- Cellulose triacetate -- Work of fracture -- Elastic modulus -- Universal correlation; Cellulose triacetate (PubChem CID: 44263853) -- Glycerin (PubChem CID: 753) -- Dioctyl phthalate (PubChem CID: 8346) -- Triethyl citrate (PubChem CID: 6506) -- Poly(ethylene glycol) (PubChem CID: 174); Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2015.05.013
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: A correlation was found between plasticizer index and mechanical properties of CTA. ν was found effective in polymer chain dynamic and plasticization efficiency. Film precursor solution concentration effects crystal structure and film morphology. Solvent evaporation rate plays a key role in ultimate properties of CTA. Abstract: Cellulose triacetate (CTA) plasticization with 25 wt% glycerin (GLY), triethyl citrate (TEC) or dioctyl phthalate (DOP) enhanced its crystalline content as much as 55%, while only 10% crystalline content increase noticed using poly (ethylene glycol) (PEG). In addition, GLY and PEG did not cause any sensible T g depression regarding CTA, whereas DOP and TEC decreased it as much as 46 °C and 16 °C, respectively. Furthermore, the work of fracture (WoF) of CTA was deteriorated by PEG, did not change using GLY and magnified as much as 6.5 and 15 times by TEC and DOP, respectively. The elastic modulus (EM) of the plasticized CTAs, however, were 1.07, 1.06, 0.42 and 0.3 GPa using GLY, PEG, TEC and DOP, respectively. Finally, the normalized WoF and EM of the plasticized CTAs by their T g depression (Δ T g ) and crystalline content ( X c ) showed a universal correlation with a plasticizer index containing its molar volume, concentration and polymer/plasticizer Painter–Coleman interaction parameter.