TY - JOUR
T1 - Fracture Mechanism Change at a Heterogeneous Polymer-Polymer Interface Reinforced with in Situ Graft Copolymers
AU - Kim, Hoyeon
AU - Kawaguchi, Daisuke
AU - Tanaka, Keiji
AU - Seo, Yongsok
N1 - Funding Information:
*E-mail: k-tanaka@cstf.kyushu-u.ac.jp (K.T.). *E-mail: ysseo@snu.ac.kr (Y.S.). ORCID Daisuke Kawaguchi: 0000-0001-8930-039X Keiji Tanaka: 0000-0003-0314-3843 Yongsok Seo: 0000-0001-9560-797X Author Contributions ∥H.K. and D.K. contributed equally. Author Contributions The manuscript was written through contributions of K.T. and Y.S. All authors have given approval to the final version of the manuscript. Funding This work was supported by the Korea National Research Foundation [BK21PLUS SNU Materials Division for Education Creative Global Leaders] and Korea Research Institute of Chemical Technology (Basic Project) (Y.S.). This work was partly supported by Nanotechnology Platform Program (Molecule and Material Synthesis) of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan (D.K. and K.T.). Notes The authors declare no competing financial interest.
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/9/18
Y1 - 2018/9/18
N2 - Dynamic secondary-ion mass spectroscopy (DSIMS) was used to investigate the change in the failure mechanism at a heterogeneous polymer-polymer interface (polystyrene (PS)/polyamide (nylon 6, Ny6)) reinforced with in situ graft copolymers produced by the reaction between Ny6 molecules and poly(styrene-co-maleic anhydride) at the interface. The variation in fracture toughness with bonding time and temperature has been explained by two different failure mechanisms: adhesive failure at the interface for short bonding times and when the bonding temperature is low and cohesive failure between chains at the interface and bulk PS for longer bonding times and when the bonding temperature is high. DSIMS results provide the direct experimental evidence that the nonreactive molecules (PS) diffuse away from the high-potential interface, which induces the cohesive failure in the bulk of the nonreactive molecules (PS) after long annealing times. The change in the adhesion strength with temperature could also cause a change in the failure mechanism. Common features of the fracture mechanisms at heterogeneous interfaces reinforced by the in situ graft copolymers are outlined, which are independent of the polymer crystallinity.
AB - Dynamic secondary-ion mass spectroscopy (DSIMS) was used to investigate the change in the failure mechanism at a heterogeneous polymer-polymer interface (polystyrene (PS)/polyamide (nylon 6, Ny6)) reinforced with in situ graft copolymers produced by the reaction between Ny6 molecules and poly(styrene-co-maleic anhydride) at the interface. The variation in fracture toughness with bonding time and temperature has been explained by two different failure mechanisms: adhesive failure at the interface for short bonding times and when the bonding temperature is low and cohesive failure between chains at the interface and bulk PS for longer bonding times and when the bonding temperature is high. DSIMS results provide the direct experimental evidence that the nonreactive molecules (PS) diffuse away from the high-potential interface, which induces the cohesive failure in the bulk of the nonreactive molecules (PS) after long annealing times. The change in the adhesion strength with temperature could also cause a change in the failure mechanism. Common features of the fracture mechanisms at heterogeneous interfaces reinforced by the in situ graft copolymers are outlined, which are independent of the polymer crystallinity.
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U2 - 10.1021/acs.langmuir.8b01860
DO - 10.1021/acs.langmuir.8b01860
M3 - Article
C2 - 30133287
AN - SCOPUS:85053344269
VL - 34
SP - 11027
EP - 11033
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 37
ER -