Microstructural Orientation Distributions Injection Molded Polyethylene Articles
A number of theories and related techniques have been developed in recent years for investigating the microstructure of partially crystalline polymers.Many of these techniques have been employedto study the anisotropy of molded articles (1–6). In the present work, a multiplicity of techniques is employed to give a detailed characterization of the microstructure (crystallinity and orienta-tion distributions) of injection molded polyethylene parts. Fur- thermore, these results are employed in conjunction with an existing mechanical model to calculate the distribution of tensilemoduli in the moldings.Comparison between experimental and cal- culated results shows good agreement.
KeywordsOrientation Function Tensile Modulus Crystalline Volume Fraction Total Orientation Form Birefringence
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