Effect of Poly(butyl acrylate)-g-poly(styrene-co-acrylonitrile)’s Core/shell Ratio on Mechanical and Thermal Properties of Poly(butyl acrylate)-g-poly(styrene-co-acrylonitrile)/α-methylstyrene-acrylonitrile Binary Blends

The aim of this research is to improve compatibility of PBS/HDPE blend using HDPE-g-MAH as a compatibilizer. The effect of HDPE-g-MAH content on mechanical and thermal properties, and degree of crystallinity of PBS/HDPE/HDPE-g-MAH blend was investigated. The blends were prepared at PBS/HDPE weight ratio of 30/70 and HDPE-g-MAH was used at a content of 2, 4, 6 and 8 part per hundred of PBS and HDPE. The results showed that yield strength and stress at break of PBS/HDPE/HDPE-g-MAH blends insignificantly increased with adding HDPE-g-MAH more than 2 phr. In addition, addition of HDPE-g-MAH to the binary blends led to an increase of elongation at break while Young’s modulus of blends exhibited an insignificant change. The addition of HDPE-g-MAH into PBS/HDPE blend did not affect both flexural modulus and flexural strength. In addition, unnotched impact strength of the blends greatly increased with increasing HDPE-g-MAH content and PBS/HDPE blend containing 8 phr of HDPE-g-MAH were not fractured within the instrument limit. For thermal properties, the presence of HDPE-g-MAH did not affect degradation temperature of PBS domain and HDPE matrix. HDPE-g-MAH of 8 phr markedly influenced the degree of crystallinity of the PBS and HDPE.

Download Full-text

Effect of different shell materials on the mechanical and thermal properties of core-shell structured bamboo-plastic composites

BioResources ◽

10.15376/biores.16.2.2861-2875 ◽

2021 ◽

Vol 16 (2) ◽

pp. 2861-2875

Author(s):

Yu Xian ◽

Cuicui Wang ◽

Ge Wang ◽

Leemiller Smith ◽

Haitao Cheng

Keyword(s):

Thermal Stability ◽

Thermal Properties ◽

Core Shell ◽

Mechanical And Thermal Properties ◽

Pulp Fibers ◽

Sem Images ◽

Relative Crystallinity ◽

Bamboo Pulp ◽

Plastic Composites ◽

White Mud

The purpose of the study was to inspect the mechanical and thermal properties of four kinds of core-shell structured bamboo-plastic composites (BPCs). The materials that were used for the fabrication of the BPCs were high density polyethylene (HDPE), bamboo pulp fibers (BPF)/HDPE, nano-CaCO3/HDPE, and white mud (WM)/HDPE. As verified by flexural properties and impact properties, the dispersion of the BPF, nano-CaCO3, and WM in the HDPE matrix was inhomogeneous. The fracture surface of the scanning electron microscope (SEM) images showed that some aggregates existed in the HDPE. Additionally, X-ray diffraction (XRD) was used to corroborate the results. The thermogravimetric analysis (TGA) showed that the samples with the WM/HDPE shell has little effect on the thermal stability. However, the apparent activation energy (Ea) values of the nano-CaCO3/HDPE shell were higher than those of the other samples, which indicated better thermal stability. The thermal stability had no remarkable changes with the addition of the WM and BPF. The differential scanning calorimeter (DSC) curves revealed that the relative crystallinity of the BPCs increased with the addition fillers, which suggested that the fillers can act as nucleating agents.

Download Full-text