Journal
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
Volume 78, Issue 2, Pages 218-235Publisher
CHEMICAL SOC JAPAN
DOI: 10.1246/bcsj.78.218
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In 1,3:2,4-bis-O-(p-methylbenzylidene)-D-sorbitol (PDTS)/molten i-PP systems, the self-assembling ramified fibrils of PDTS are formed at T-fg,T-c higher than T-c during the cooling process. They function as the nucleators for the nucleation of molten i-PP. The ramified fibrils have the following characteristics: i) hexagonal crystal with the lattice cell a = b = 30.2, c = 4.4 Angstrom, and gamma = 120degrees, ii) mass fractal structure with large specific surface area, and iii) random orientation. Thus the following properties are induced for the i-PP: i) excellent transparency so that the lamellae build a sheaf-like crystalline superstructure with a small apex angle, ii) iso-directional and improved mechanical properties, and iii) shortened molding time.
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