Study of Morphological and Mechanical Properties of PBT/PTT Blends and Their Nanocomposites and Their Correlation

• Published in: Arabian journal for science and engineering (2011) Vol. 44; no. 2; pp. 1137 - 1150
• Main Authors: Sharma, Ranjana, Jain, Purnima, Dey Sadhu, Susmita
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 12.02.2019; Springer Nature B.V
• Subjects: Engineering; Humanities and Social Sciences; Impact strength; Low density polyethylenes; Mechanical properties; Mixtures; Modulus of elasticity; multidisciplinary; Nanocomposites; Phase separation; Polybutylene terephthalates; Research Article - Mechanical Engineering; Rubber; Science; Spherulites; Twin screw extruders; PTT; PBT; Blends; Nanocomposites; Morphology; Mechanical
• ISSN: 2193-567X; 1319-8025; 2191-4281
• DOI: 10.1007/s13369-018-3424-7

Impact modified PBT/PTT blends based nanocomposites having organoclay content varying from 2, 3 and 5 wt% were prepared using corotating twin-screw extruder. Organoclay (Cloisite 30B) was used as nanofiller. Ultra-low-density polyethylene-grafted glycidyl methacrylate (ULDPE-g-GMA) was used as an impact modifier to toughen the polymeric matrices. In all the prepared nanocomposites, the amount of impact modifier (ULDPE-g-GMA) remains constant, i.e., 2 wt%. Izod impact testing showed that only 2 wt% impact modifier (ULDPE-g-GMA) was enough to improve the notched Izod impact strength of the neat PBT and neat PTT by 85.6 and 98.6 %, respectively. It shows an excellent toughening of PBT and PTT with ULDPE- g-GMA rubber. It was further found that the incorporation of only 3 wt% organoclay significantly improved the tensile strength, tensile modulus values of PBT/PTT blends. The result of FEG-SEM indicated that nanocomposite with 3 wt% organoclay in PBT/PTT/2wt% ULDPE-g-GMA did not show phase separation. It showed that 3 wt% organoclay was homogeneously dispersed in impact modified PBT/PTT blends based nanocomposites. POM studies revealed that the well-defined spherulites are present in neat PBT and neat PTT when T c was 205 ∘ C.