Mean-Square Optical Anisotropy of Isotactic Oligo- and Poly(methyl methacrylate)s in Dilute Solution

1995 ◽  
Vol 28 (12) ◽  
pp. 4167-4172 ◽  
Author(s):  
Yoshio Takaeda ◽  
Takenao Yoshizaki ◽  
Hiromi Yamakawa

1993 ◽  
Vol 26 (15) ◽  
pp. 3742-3749 ◽  
Author(s):  
Yoshio Takaeda ◽  
Takenao Yoshizaki ◽  
Hiromi Yamakawa


1994 ◽  
Vol 27 (20) ◽  
pp. 5697-5703 ◽  
Author(s):  
Masanao Kamijo ◽  
Nobuo Sawatari ◽  
Toshiki Konishi ◽  
Takenao Yoshizaki ◽  
Hiromi Yamakawa


1997 ◽  
Vol 30 (20) ◽  
pp. 6199-6207 ◽  
Author(s):  
Hitoshi Ando ◽  
Takenao Yoshizaki ◽  
Akihiro Aoki ◽  
Hiromi Yamakawa


1966 ◽  
Vol 44 (2) ◽  
pp. 153-156 ◽  
Author(s):  
S. Brownstein ◽  
D. M. Wiles

The high resolution proton magnetic resonance spectra of five samples of poly(methyl methacrylate) in chloroform solution have been measured with 100 Mc/s equipment. The widths of the absorption lines arising from the protons of the α-methyl and the methoxyl groups have been compared. The widths are greater when the polymer is predominantly syndiotactic than when it is predominantly isotactic. It is concluded that isotactic samples have the more extended conformation in chloroform solution. An analogy with dilute solution viscosity measurements is outlined in support of this conclusion. Differences between the widths of the lines of the methylene protons in a completely isotactic poly(methyl methacrylate) sample are attributed to long range spin coupling.



1994 ◽  
Vol 27 (15) ◽  
pp. 4259-4262 ◽  
Author(s):  
Takenao Yoshizaki ◽  
Hisao Hayashi ◽  
Hiromi Yamakawa


1971 ◽  
Vol 4 (2) ◽  
pp. 193-198 ◽  
Author(s):  
E. Hamori ◽  
W. C. Forsman ◽  
R. E. Hughes


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