Example, the value of the birefringence of triacetate fiber is -0.005. In triacetate and acrylic fibers, the side groups have a greater effect than the main chain, and the birefringence is negative. This will increase the value of n ⊥ and reduce the birefringence. (c), and these will have the effect of providing atomic bonds at right angles to the main axis. ⦿ Secondly, there will be side groups attached to the main chain, as in Fig. Example, the value of the birefringence of polyester fiber is 0.188. (b) provided that the bonds diverge from the main axis by less than about 55°, this still gives a positive birefringence. ⦿ Firstly, most main chains have a zigzag form Fig.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |