Baozhu An. Varied Regularities of Space Group of Crystal Structure of Helix Type Polymer Chains[J]. Polymer Bulletin, 1995,8(2):73-78. DOI: 10.14028/j.cnki.1003-3726.1995.02.002.
The present paper investigated the varied regularities of space group of crystal structure of helix type polymer chains in terms of coloured symmetry theory. The results indicate: (1) For the same polymer
the ordered arrangement of chains must have a space group that is the coloured space group of the discordered arrangement. (2) For the different helix-type polymers
the lower symmetry crystal form must have a space group that is the coloured space group of the higher symmetry form. (3) The direction
path and result of a change from the space group to its coloured space group are given.