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Thermal, mechanical, and rheological properties of polylactide/poly(1,2‐propylene glycol adipate)
Author(s) -
Zhang Huiliang,
Fang Jianyong,
Ge Huanhuan,
Han Lijing,
Wang Xuemei,
Hao Yanping,
Han Changyu,
Dong Lisong
Publication year - 2013
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.23238
Subject(s) - materials science , rheometry , differential scanning calorimetry , dynamic mechanical analysis , adipate , composite material , rheology , glass transition , ultimate tensile strength , plasticizer , dynamic modulus , izod impact strength test , polymer , physics , thermodynamics
Polylactide (PLA) was melt blended with poly(1,2‐propylene glycol adipate) (PPA) in a Thermo‐Haake mixer. Thermal, mechanical, and rheological properties of the blends were investigated by means of differential scanning calorimetry, dynamic mechanical analysis, tensile test, and small amplitude oscillatory shear rheometry. PPA lowered the glass transition temperature and increased the ability of PLA to cold crystallization. With the increase in PPA content (5–25 wt%), the blends showed decreased tensile strength and Young's modulus; however, impact strength and elongation‐at‐break along were dramatically increased due to the plastic deformation. Morphological results of PLA/PPA blends showed that PPA was good compatible with PLA. The plasticization effect of PPA was also manifested by the lowering of dynamic storage modulus and viscosity in the melt state of the blends compared with neat PLA. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers