Effects of dicumyl peroxide on cross‐linking pure poly(butylene succinate) foaming materials for high expansion and high mechanical strength

Abstract

This paper fabricated the cross‐linking poly(butylene succinate) foaming materials with high expansion ratio, high mechanical strength, and high degradation rate though cross‐linking and molding compression methods. With dicumyl peroxide content increasing, complex viscosity, and storage modulus appear to increase tendency. The properties of cell size, distribution, mechanical properties, and thermal conductivity all appear the first increasing and then decreasing trend with dicumyl peroxide content increasing. When dicumyl peroxide concentration is 6 wt% and azodicarbonamide concentration is 1 wt%, pure cross‐linking poly(butylene succinate) foaming material's expansion ratio and compression strength could reach 7.03 and 5.61 MPa, respectively. In addition, this pure cross‐linking poly(butylene succinate) foaming material has high degradability, and the degradation ratio could get 80% in alkaline aqueous solution.

Forefront Research of Foaming Strategies on Biodegradable Polymers and Their Composites by Thermal or Melt-Based Processing Technologies: Advances and Perspectives

“…In contrast, chemical blowing agents (CBAs) are chemical substances that are dispersed or dissolved within the polymeric matrix and decompose thermally into non-reacting gases, such as CO 2 and/or N 2 , during the foaming process. Examples of CBAs include azodicarbonamide [44][45][46][47], N, N-Dinitroso pentamethylene tetramine (also known as H foaming agent) [48,49], sodium bicarbonate (NaHCO 3 ) [10], and zinc carbonate (ZnCO 3 ) [50]. After the decomposition of the CBA, the formation of a separate gas phase can be instantaneous, or it can take some time depending on the solubility of the gas within the polymer.…”