20994

EPDM-HDPE Blends with Different Cure Systems/Mechanical and Infra-Red Spectrometric Properties

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The physico-mechanical properties and the Iufra-red (IR) spectra (obtained by applying the Attenuated Total Reflectance (ATR) techuique) of high density polyethylene (RDPE)/ethylene propylene diene terpolymer (EPDM) blends were investigated using a Zwick Tensile Testing machine and a Fourier Transform Iufra-red (FTIR) spectrometer Three kinds of cure systems were used: sulfur, tetramethylthiuram disulfide (TR) and 2-mercaptobenzothiazole (M); sulfur, tetramethylthiuram disulfide (TR) and zinc-diethyldithiocarbamate (ZDEC); sulfur, tetramethylthiuram disulfide (TR) and diphenylguanidine (D). The composition ofHDPE and EPDM was fixed at 50/50 by weight and the ratio cure accelerators/sulfur was varied from 0.4 to 6.34 by weight. Results indicated that polymer alloys EPD1v1IHDPE containing as cure agents Sulfur, TH and M, in a ratio cure accelerators/sulfur = 6.34 and 1.85, respectively, showed improved physico-mechanical properties as compared to the other polymer blends. This behavior was confirmed by the recorded ATR-FTIR spectra of the studied samples.

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