The results show that the crystallinity of the HPC1 films was higher than the HPC2 films (a mixture of phosphate salts). This might be because the bulky monostarch phosphate (STPP) in the HPC2 films prevents amylose aggregation and this decreases the crystallinity. Basically, chemical reactions generally occur randomly with the primary hydroxyls (C-6), the secondary hydroxyls (C-2, C-3, and C-4), the aldehydic reducing end groups, and the glycol groups (the cleavage of C-2single bondC-3 bonds). The properties of starches may be mainly affected by modifications at the C-2, C-3, and C-6 positions because of the large number of hydroxyls at these positions (Fig. 7) [49] and [71].