Abstract
The scratch test was conducted for polycarbonate (PC) and poly(methyl methacrylate) (PMMA) with a load-progressive mode. Changes in the molecular aggregation structure of PC and PMMA induced by the scratch test were investigated based on polarized optical microscopic observation and small-angle X-ray scattering (SAXS) measurement. The scratching coefficient of friction (SCOF), the ratio of tangential load to normal load, of PC was much larger than that of PMMA. The width and depth of the damage on the scratch path was increased monotonically with the increase in the normal load. Hardness obtained by nanoindentation and microindentation tests were similar to those with SCOF, indicating that compression resistance mainly governs the scratch properties. The polarized optical microscopic images revealed that molecules were oriented from the edge to the center of the scratch path at a certain acute angle for both PC and PMMA. SAXS measurement revealed that microfibrils were formed along the direction of stress for PC.
| Original language | English |
|---|---|
| Article number | 121773 |
| Journal | polymer |
| Volume | 181 |
| DOIs | |
| Publication status | Published - Oct 24 2019 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry
Cite this
Direct visualization of the molecular orientation and microstructure of glassy transparent polymers after the scratch test based on optical microscopy and X-ray scattering. / Kojio, Ken; Kajiwara, Tomoko; Yamamoto, Saburo; Fujimoto, Aya; Fukada, Kento; Nagano, Chigusa; Masuda, Shiori; Cheng, Chao Hung; Nozaki, Shuhei; Kamitani, Kazutaka; Takahara, Atsushi.
In: polymer, Vol. 181, 121773, 24.10.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Direct visualization of the molecular orientation and microstructure of glassy transparent polymers after the scratch test based on optical microscopy and X-ray scattering
AU - Kojio, Ken
AU - Kajiwara, Tomoko
AU - Yamamoto, Saburo
AU - Fujimoto, Aya
AU - Fukada, Kento
AU - Nagano, Chigusa
AU - Masuda, Shiori
AU - Cheng, Chao Hung
AU - Nozaki, Shuhei
AU - Kamitani, Kazutaka
AU - Takahara, Atsushi
PY - 2019/10/24
Y1 - 2019/10/24
N2 - The scratch test was conducted for polycarbonate (PC) and poly(methyl methacrylate) (PMMA) with a load-progressive mode. Changes in the molecular aggregation structure of PC and PMMA induced by the scratch test were investigated based on polarized optical microscopic observation and small-angle X-ray scattering (SAXS) measurement. The scratching coefficient of friction (SCOF), the ratio of tangential load to normal load, of PC was much larger than that of PMMA. The width and depth of the damage on the scratch path was increased monotonically with the increase in the normal load. Hardness obtained by nanoindentation and microindentation tests were similar to those with SCOF, indicating that compression resistance mainly governs the scratch properties. The polarized optical microscopic images revealed that molecules were oriented from the edge to the center of the scratch path at a certain acute angle for both PC and PMMA. SAXS measurement revealed that microfibrils were formed along the direction of stress for PC.
AB - The scratch test was conducted for polycarbonate (PC) and poly(methyl methacrylate) (PMMA) with a load-progressive mode. Changes in the molecular aggregation structure of PC and PMMA induced by the scratch test were investigated based on polarized optical microscopic observation and small-angle X-ray scattering (SAXS) measurement. The scratching coefficient of friction (SCOF), the ratio of tangential load to normal load, of PC was much larger than that of PMMA. The width and depth of the damage on the scratch path was increased monotonically with the increase in the normal load. Hardness obtained by nanoindentation and microindentation tests were similar to those with SCOF, indicating that compression resistance mainly governs the scratch properties. The polarized optical microscopic images revealed that molecules were oriented from the edge to the center of the scratch path at a certain acute angle for both PC and PMMA. SAXS measurement revealed that microfibrils were formed along the direction of stress for PC.
UR - http://www.scopus.com/inward/record.url?scp=85072176905&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85072176905&partnerID=8YFLogxK
U2 - 10.1016/j.polymer.2019.121773
DO - 10.1016/j.polymer.2019.121773
M3 - Article
AN - SCOPUS:85072176905
VL - 181
JO - Polymer
JF - Polymer
SN - 0032-3861
M1 - 121773
ER -