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Preparation and characterization of poly(2‐methyl‐1,5‐pentamethylene oxamide) (PM52) polymer
Author(s) -
Mutua Fredrick Nzioka,
Gao Yuanbo,
Yang Tingting,
Zhu Bo,
He Yong
Publication year - 2018
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.4266
Subject(s) - crystallization , materials science , crystallinity , thermal stability , polymer chemistry , thermogravimetric analysis , fourier transform infrared spectroscopy , chemical engineering , enthalpy of fusion , polymer , absorption of water , condensation polymer , nuclear chemistry , melting point , composite material , chemistry , engineering
Poly(2‐methyl‐1,5‐pentaneoxamide) ( PM52) with relative viscosity up to 3.3 were synthesized using 2‐methyl‐1,5‐pentanediamine (M52) and dibutyl oxalate via spray/melt polycondensation. The obtained polyoxamide was characterized by FTIR, 1 H‐NMR, WAXD, DSC, and TGA. The T m of PM52 was 200°C with a heat of fusion (ΔH f ) of 59.7 J·g− 1 , crystallization temperature of 125°C, and a crystallization enthalpy (ΔH c ) of 42.6 J·g −1 . Isothermal crystallization studies revealed a 2‐dimensional crystallization phenomenon which didn't vary with change in crystallization temperature. TGA analysis revealed that the thermal stability of PM52 compared well with commercial PA6, and XRD studies revealed an α form of crystal structure and that the polymers possessed good crystallinity. Saturated water absorption of 4.6 wt% was recorded for the new polyoxamide synthesized as compared with 10.6 wt% for commercial PA6; such properties are good for applications in the food industry, plastics, and electronics industry where dimensional stability is a key requirement.