TY - JOUR
T1 - Effect of Blend Composition on Scratch Behavior of Polystyrene/Poly(2,6-dimethyl-1,4-phenyleneoxide) Blends
AU - Kojio, Ken
AU - Kiyoshima, Yudai
AU - Kajiwara, Tomoko
AU - Higaki, Yuji
AU - Sue, Hung Jue
AU - Takahara, Atsushi
N1 - Funding Information:
This work was supported by the Impulsing Paradigm Change through Disruptive Technology (ImPACT) Program and the Photon and Quantum Basic Research Coordinated Development Program from the Ministry of Education, Culture, Sports, Science and Technology, Japan, and Scratch Consortium, Japan. Wide-angle X-ray diffraction measurements were done at BL40XU and BL05XU, the SPring-8 facility with the approval of the Japan Synchrotron Radiation Research Institute (JASRI; Proposal No. 2015A1582, 2015A1514, 2015B1325, 2016A1012, 2016A1414, 2016B1032, 2016B1436).
Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/1
Y1 - 2019/1
N2 - The relationship between the scratch behavior and molecular aggregation states of polystyrene (PS), poly(2,6-dimethyl-1,4-phenyleneoxide) (PPO), and their blends, is investigated based on differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), polarized optical microscopy (POM), and indentation and scratch tests. DSC reveals that all the PS/PPO blends show the single glass transition temperature (Tg) and the Tg monotonically increase and Tg breadth exhibits a maximum, with an increase in PPO content. Furthermore, density and intermolecular chain distance obtained by WAXD exhibits maximum and minimum values at near 50 wt% of PPO, respectively. It is evident that densification occurs by blending PS and PPO. The scratch coefficient of friction (SCOF) value of PS is the largest and PS exhibits a fish-scale pattern after scratch testing, while the SCOF value of PPO is much smaller than PS and PPO exhibits smooth groove formation. The PS50/PPO50 and PS20/PPO80 blends exhibit superior scratch and indentation resistance than PS and PPO. Damage morphology observation by POM and indentation tests reveals that molecular orientation is more restricted, and resistance against indentation increases for blends. This is due mainly to densification of the blend system.
AB - The relationship between the scratch behavior and molecular aggregation states of polystyrene (PS), poly(2,6-dimethyl-1,4-phenyleneoxide) (PPO), and their blends, is investigated based on differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), polarized optical microscopy (POM), and indentation and scratch tests. DSC reveals that all the PS/PPO blends show the single glass transition temperature (Tg) and the Tg monotonically increase and Tg breadth exhibits a maximum, with an increase in PPO content. Furthermore, density and intermolecular chain distance obtained by WAXD exhibits maximum and minimum values at near 50 wt% of PPO, respectively. It is evident that densification occurs by blending PS and PPO. The scratch coefficient of friction (SCOF) value of PS is the largest and PS exhibits a fish-scale pattern after scratch testing, while the SCOF value of PPO is much smaller than PS and PPO exhibits smooth groove formation. The PS50/PPO50 and PS20/PPO80 blends exhibit superior scratch and indentation resistance than PS and PPO. Damage morphology observation by POM and indentation tests reveals that molecular orientation is more restricted, and resistance against indentation increases for blends. This is due mainly to densification of the blend system.
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U2 - 10.1002/macp.201800371
DO - 10.1002/macp.201800371
M3 - Article
AN - SCOPUS:85055955490
SN - 1022-1352
VL - 220
JO - Macromolecular Chemistry and Physics
JF - Macromolecular Chemistry and Physics
IS - 1
M1 - 1800371
ER -