Abstract
We proposed the "birefringent crystal dopant method" in order to compensate the birefringence of polymers. In this method, the birefringence was compensated by homogeneous doping with a needlelike crystal which has the opposite birefringence to that of the polymers. Strontium carbonate (SrCO 3) was selected for this purpose because it has a large birefringence and a needlelike shape. SrCO3 was synthesized, with a length of about 200 nm and a width of about 20 nm, and doped into a poly-(MMA/BzMA=78/ 22(w/w)) film. The film was drawn at 130°C and 4 mm/min. The orientational birefringence of the drawn polymer film at a wavelength of 633 nm was compensated by doping with 0.3 wt % SrCO3 without losing its transparency and thermostability. The analysis of infrared dichroism of the films showed that the birefringence of the films was compensated at a low concentration of SrCO3 because of its orientation-inhibition effect and its high orientation degree as compared with that of the polymer main chains.
| Original language | English |
|---|---|
| Pages (from-to) | 8342-8348 |
| Number of pages | 7 |
| Journal | Macromolecules |
| Volume | 37 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 2004 Nov 2 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Materials Chemistry
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Preparation of a zero-birefringence polymer doped with a birefringent crystal and analysis of its characteristics. / Ohkita, Hisanori; Tagaya, Akihiro; Koike, Yasuhiro.
In: Macromolecules, Vol. 37, No. 22, 02.11.2004, p. 8342-8348.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Preparation of a zero-birefringence polymer doped with a birefringent crystal and analysis of its characteristics
AU - Ohkita, Hisanori
AU - Tagaya, Akihiro
AU - Koike, Yasuhiro
PY - 2004/11/2
Y1 - 2004/11/2
N2 - We proposed the "birefringent crystal dopant method" in order to compensate the birefringence of polymers. In this method, the birefringence was compensated by homogeneous doping with a needlelike crystal which has the opposite birefringence to that of the polymers. Strontium carbonate (SrCO 3) was selected for this purpose because it has a large birefringence and a needlelike shape. SrCO3 was synthesized, with a length of about 200 nm and a width of about 20 nm, and doped into a poly-(MMA/BzMA=78/ 22(w/w)) film. The film was drawn at 130°C and 4 mm/min. The orientational birefringence of the drawn polymer film at a wavelength of 633 nm was compensated by doping with 0.3 wt % SrCO3 without losing its transparency and thermostability. The analysis of infrared dichroism of the films showed that the birefringence of the films was compensated at a low concentration of SrCO3 because of its orientation-inhibition effect and its high orientation degree as compared with that of the polymer main chains.
AB - We proposed the "birefringent crystal dopant method" in order to compensate the birefringence of polymers. In this method, the birefringence was compensated by homogeneous doping with a needlelike crystal which has the opposite birefringence to that of the polymers. Strontium carbonate (SrCO 3) was selected for this purpose because it has a large birefringence and a needlelike shape. SrCO3 was synthesized, with a length of about 200 nm and a width of about 20 nm, and doped into a poly-(MMA/BzMA=78/ 22(w/w)) film. The film was drawn at 130°C and 4 mm/min. The orientational birefringence of the drawn polymer film at a wavelength of 633 nm was compensated by doping with 0.3 wt % SrCO3 without losing its transparency and thermostability. The analysis of infrared dichroism of the films showed that the birefringence of the films was compensated at a low concentration of SrCO3 because of its orientation-inhibition effect and its high orientation degree as compared with that of the polymer main chains.
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UR - http://www.scopus.com/inward/citedby.url?scp=18744386995&partnerID=8YFLogxK
U2 - 10.1021/ma049296+
DO - 10.1021/ma049296+
M3 - Article
AN - SCOPUS:18744386995
VL - 37
SP - 8342
EP - 8348
JO - Macromolecules
JF - Macromolecules
SN - 0024-9297
IS - 22
ER -