On transformations in isotactic polybutene‐1

Direct crystal growth of isotactic polybutene-1 trigonal phase in the melt: In-situ observation

“…When stored at room temperature, the tetragonal phase undergoes a solid-solid transformation into the trigonal phase with 3 1 helical chains. The orthorhombic phase has 4 1 helices and is obtained from solution [6][7][8]. Solution crystallization also yields the trigonal phase.…”

“…Three different polymorphs, designated trigonal, tetragonal and orthorhombic phases, have been reported in the literature [1][2][3][4][5][6][7][8][9][10][11][12][13]. Crystallization in the bulk under atmospheric pressure yields the tetragonal phase with 11 3 helical chains [1][2][3].…”

Surface tension, (solid+liquid) equilibria and (liquid+liquid) equilibria for (iPBu-1+hydrocarbon, or alcohol) systems

“…The applications in many industrial fields arise from its excellent thermal, mechanical and chemical properties [1,2]. The polymorphic transformations [3][4][5][6][7][8][9][10][11][12][13][14] of iPBu-1 increase its possible applications (iPBu-1 is used in the manufacture of pipes, tubes, pressure sensitive tapes, heavy duty bags, Abbreviations: EOS, PC-SAFT, equation of state; FH, Flory-Huggins; FV, free volume; GCFLORY, group-contribution Flory; GCLF, groupcontribution lattice fluid; iPBu-1, isotactic poly(1-butene); LLE, (liquid + liquid) phase equilibria; PE, polyethylene; PIB, polyisobutylene; PP, polypropylene; SLE, (solid + liquid) phase equilibra; UCTS, upper critical solution temperature; UNIFAC, universal functional activity coefficient; I, crystalline modification of iPBu-1 (Form I); II, crystalline modification of iPBu-1 (Form II) agricultural films, gaskets, diaphragms and in the production of house furnishing, electrical apparatus or automotive parts where high impact resistance is needed [1,2]). …”

Supercritical CO2 induced phase transition of Form III in isotactic poly‐1‐butene

“…• C. [9] Densities, crystal structure, helix conformation, and melting points of four iPB-1 crystal forms are listed in Table 1.…”