Determination of crystallinity ratio and some physicochemical properties of poly(4-methyl-1-pentene)

• Published in: Journal of applied polymer science 2009-07, Vol.113 (2), p.901-906
• Main Authors: Yazici, O, Cakar, F, Cankurtaran, O, Karaman, F
• Format: Article
• Language: English
• Subjects: Acetates; Activity coefficients; Applied sciences; Crystallinity; Differential scanning calorimetry; Exact sciences and technology; Interaction parameters; Inverse gas chromatography; Melting points; Organic polymers; percent crystallinity; Physicochemistry of polymers; poly(4-methyl-1-pentene); Properties and characterization; Thermal and thermodynamic properties; thermodynamics; Thermogravimetric analysis
• ISSN: 0021-8995; 1097-4628; 1097-4628
• DOI: 10.1002/app.29985

It was determined that the thermal stability of poly(4-methyl-1-pentene) (P4MP) was maintained up to 424°C in an inert atmosphere by thermogravimetric analysis. The retention diagrams of ethyl acetate, tert-butyl acetate, and benzene on P4MP were plotted at temperatures between 30 and 280°C by inverse gas chromatography (IGC) technique. Melting temperature of the polymer was determined as 230 and 239.5°C by IGC and differential scanning calorimetry (DSC), respectively. The percent crystallinity of P4MP was obtained from the retention diagrams at temperatures below melting point. The percent crystallinity obtained by IGC is in good agreement with the ones obtained by DSC. Then, specific retention volume, Vg ⁰, weight fraction activity coefficient, Ω₁ [infinity], Flory-Huggins polymer-solvent interaction parameter, χ₁₂ [infinity], equation-of-state polymer-solvent interaction parameter, χ₁₂ *, and effective exchange energy parameter, Xeff of octane, nonane, decane, undecane, dodecane, tridecane, n-butyl acetate, isobutyl acetate, isoamyl acetate with P4MP, were determined between 240 and 280°C by IGC.