The effects of thermal treatment on microstructure of the Polyesters were studied. Annealing below Tc-n, physical diffusion PrOCesses dominate to yield an increasing crystallinity along with increased molecular weight...The effects of thermal treatment on microstructure of the Polyesters were studied. Annealing below Tc-n, physical diffusion PrOCesses dominate to yield an increasing crystallinity along with increased molecular weight transesterification reactions are limited to the end groups and the microstructure had not changed Annealing near Tc-n, chemical processes dominate and simultaneously make the microdomains ordered more perfectly. Analysis by 13C NMR Proved that interchain transesterification had occurred.展开更多
SINCE the concept of random walks (RW) was propounded formally by Pearson in 1905, there has been extensive research in mathematics. Then it expanded to many areas such as physics, chemistry, biology, engineering, com...SINCE the concept of random walks (RW) was propounded formally by Pearson in 1905, there has been extensive research in mathematics. Then it expanded to many areas such as physics, chemistry, biology, engineering, commerce and social studies. The study of confined RW is interesting because of the practical applications. An RW terminally attached to an impene-展开更多
文摘The effects of thermal treatment on microstructure of the Polyesters were studied. Annealing below Tc-n, physical diffusion PrOCesses dominate to yield an increasing crystallinity along with increased molecular weight transesterification reactions are limited to the end groups and the microstructure had not changed Annealing near Tc-n, chemical processes dominate and simultaneously make the microdomains ordered more perfectly. Analysis by 13C NMR Proved that interchain transesterification had occurred.
文摘SINCE the concept of random walks (RW) was propounded formally by Pearson in 1905, there has been extensive research in mathematics. Then it expanded to many areas such as physics, chemistry, biology, engineering, commerce and social studies. The study of confined RW is interesting because of the practical applications. An RW terminally attached to an impene-
