ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The effect of a fine powder of Y2O3, Nd2O2, and Ho2O3, on the crystal structure of isotactic polypropylene (iPP) was studied with WAXD and DSC techniques. The results showed that the addition of the three rare earth oxides (REOs) can increase the crystallite size of the α-form crystal and the degree of crystallinity of iPP at an annealing temperature of 120°C and that both Y2O3 and Nd2O3 are the β-nucleator of iPP. REOs enhance the overall growth rate of the spherulites of iPP. All the iPP samples filled with REOs which were crystallized isothermally at 132°C from the melt exhibited their melting peaks of the β-form on the DSC heating traces, indicating that the REOs are the nucleating agents for both the α- and β-forms of iPP under isothermal conditions. © 1996 John Wiley & Sons, Inc.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
