“…[1][2][3] These excellent properties make iPB-1 suitable for manufacturing pressurized tanks, pipes, films, and thin plates, especially hot water pipes, [1][2][3][4][5][6] and make it very competitive relative to polypropylene or polyethylene. 7,8 It should be noted that iPB-1 is polymorphic and its mechanical properties are heavily dependent on the crystal forms, 9 including forms I, II and III, 10,11 consisting of 3/1, 11/3, and 4/1 helices 12,13 in trigonal, 10 tetragonal, [14][15][16][17] and orthorhombic 18 crystal cells. Among the crystal forms, form I has the highest melting temperature T m of around 130 °C and is the most stable.…”