Local motion of crosslinks for poly (methyl methacrylate) gels by the fluorescence depolarization method

1997 ◽  
Vol 39 (1) ◽  
pp. 109-116 ◽  
Author(s):  
Hiroyuki Aoki ◽  
Jun-ichi Horinaka ◽  
Shinzaburo Ito ◽  
Masahide Yamamoto
Keyword(s):  
Methyl Methacrylate ◽  
Local Motion ◽  
Fluorescence Depolarization ◽  
Poly Methyl Methacrylate

Local Chain Motion of Isotactic and Syndiotactic Poly(methyl methacrylate)s Studied by the Fluorescence Depolarization Method

1995 ◽  
Vol 28 (14) ◽  
pp. 5012-5016 ◽  
Author(s):  
Keiko Ono ◽  
Tsuyoshi Sasaki ◽  
Masahide Yamamoto ◽  
Yumi Yamasaki ◽  
Koichi Ute ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Fluorescence Depolarization ◽  
Poly Methyl Methacrylate

scholarly journals Local Dynamics of the Hydration Water and Poly(Methyl Methacrylate) Chains in PMMA Networks

2021 ◽  
Vol 9 ◽  
Author(s):  
Yoshihisa Fujii ◽  
Taiki Tominaga ◽  
Daiki Murakami ◽  
Masaru Tanaka ◽  
Hideki Seto
Keyword(s):  
Methyl Methacrylate ◽  
Bulk Water ◽  
Polymer Chains ◽  
Water Molecules ◽  
Hydration Water ◽  
Segmental Motion ◽  
Local Motion ◽  
Deuterium Labeling ◽  
Elastic Neutron ◽  
Poly Methyl Methacrylate

The dynamic behavior of water molecules and polymer chains in a hydrated poly(methyl methacrylate) (PMMA) matrix containing a small amount of water molecules was investigated. Water molecules have been widely recognized as plasticizers for activating the segmental motion of polymer chains owing to their ability to reduce the glass transition temperature. In this study, combined with judicious hydrogen/deuterium labeling, we conducted quasi-elastic neutron scattering (QENS) experiments on PMMA for its dry and hydrated states. Our results clearly indicate that the dynamics of hydrated polymer chains are accelerated, and that individual water molecules are slower than bulk water. It is therefore suggested that the hydration water affects the local motion of PMMA and activates the local relaxation process known as restricted rotation, which is widely accepted to be generally insensitive to changes in the microenvironment.

Sign in / Sign up

Export Citation Format

Share Document