The Effect of Blending Acrylic Grafted PVC and PVC K–66 with ABS on Impact and Flexural Properties

Abstract

Adunan antara ABS dan PVC telah dikaji. Adunan yang mempunyai pelbagai nisbah ini disediakan dengan teknik pengadunan leburan. ABS yang mempunyai ketegaran tinggi, hentaman yang sederhana dan hentaman paling tinggi digunakan sebagai polimer dasar. Manakala, PVC bercangkuk akrilik dan PVC K–66 ditambah ke dalam ABS. Ujian hentaman Izod dititik–beratkan. Kekuatan hentaman adunan meningkat berikutan dengan peningkatan berat molekul PVC. Yang menariknya, kekuatan hentaman yang paling tinggi wujud apabila PVC bercangkuk akrilik diadunkan bersama ABS berhentaman paling tinggi. Walau bagaimanapun, penurunan modulus lenturan berlaku apabila PVC ditambah ke dalam ABS. Penurunan modulus lenturan yang paling minimum ialah adunan antara PVC K–66 dan ABS bertegaran tinggi. Keputusan yang diperolehi adalah serasi dengan pemeriksaan morfologi. Mikroskopi imbasan elektron (SEM) menunjukkan semakin tinggi kandungan PVC, semakin tinggi kekuatan hentaman. Kata kunci: ABS; PVC; kekuatan hentaman; modulus lenturan; SEM Blends of acrylonitrile butadiene styrene (ABS) and poly(vinyl chloride) (PVC) were studied. The blends were prepared in different ratios by melt blending technique. High rigidity; medium impact and super high impact ABS were used as the base polymer. Acrylic grafted PVC and PVC K–66 were incorporated into the blends. Particular emphasis was on Izod impact test. The impact strength of the blends increased with increasing content of PVC. Interestingly, the result shows that the highest impact strength occurs when acrylic grafted PVC was added into super high impact ABS. However, it was observed that when PVC is incorporated in ABS, there is a decrease in the flexural modulus. The least decrease occurred when PVC K–66 was added into high rigidity ABS. These observations are consistent with the morphological studies. Scanning electron microscopy (SEM) revealed that an increase in PVC content results in greater ductility. Key words: ABS; PVC; impact strength; flexural modulus; SEM