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Direct Compounding Injection Molding and Resulting Properties of Ternary Blends of Polylactide, Polybutylene Succinate and Hydrogenated Styrene Farnesene Block Copolymers
Author(s) -
Hirsch Patrick,
Menzel Matthias,
Klehm Jessica,
Putsch Peter
Publication year - 2019
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201800167
Subject(s) - materials science , polybutylene terephthalate , ternary operation , composite material , rheometry , izod impact strength test , copolymer , polymer blend , ultimate tensile strength , compounding , scanning electron microscope , dynamic mechanical analysis , charpy impact test , molding (decorative) , rheology , polymer , polyester , computer science , programming language
Direct compounding injection molding of ternary blends of polylactide (PLA), polybutylene succinate (PBS) and a hydrogenated styrene farnesene block copolymer (HSFC) was investigated for different blend compositions. Morphological analysis by atomic force microscopy and scanning electron microscopy showed a heterogeneous morphology of the ternary blends, with coexisting droplets of HSFC and PLA respectively PBS. Particle sizes analysis of the minor phases in the ternary blends showed mean values in the range of ∼1 μm, which is discussed in correlation to the rheological properties of the blend components as obtained by high pressure capillary rheometry. In result, with increasing HSFC content, the ternary blends showed a significant increase in notched Charpy impact strength (a cN ). In concrete, for the ternary blends with 15 wt% of HSFC a maximum a cN of 15.8 kJ/m 2 was found. At the same time, incorporation of the HSFC resulted only in a moderate reduction in elastic modulus and tensile strength.