Morphology and mechanical behaviors of rigid organic particles reinforced polycarbonate. Issue 5 (6th August 2020)

• Record Type: Journal Article
• Authors: Su, Yukai; Sai, Ting; Ran, Shiya; Fang, Zhengping; Guo, Zhenghong
• Is Part Of: Journal of applied polymer science. Volume 138:Issue 5(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-08-06
• Subjects: blends -- mechanical properties -- morphology -- polycarbonates; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.49762
• Languages: English
• ISSNs: 0021-8995

Abstract

Abstract: For the purpose of promoting mechanical properties of bisphenol‐A polycarbonate (PC) reinforced by rigid organic styrene–acrylonitrile copolymer (SAN) particles, styrene/acrylonitrile/glycidyl methacrylate terpolymer (SAG) was synthesized and applied as compatibilizer for PC/SAN blends. It is found that the phase morphology of PC/SAN/SAG blends is closely related with their mechanical properties. Large continuously distributed SAN phase or spherical dispersed SAN particles with average diameter over 2 μm tend to trigger premature tensile failure of blends due to stress concentration. The incorporation of SAG can simultaneously reinforce and toughen PC/SAN blends by controlling the size and distribution of the dispersed SAN particles. For the blends with fixed PC/SAN ratio, the elongation at break and fracture energy are markedly improved when SAN domain size is reduced by adding appropriate amount of SAG. Typically, for blends with a PC/SAN ratio of 75/25, adding 3 wt% SAG will cause the average diameter of SAN particles to reduce from 2.35 ± 1.20 to 0.74 ± 0.25 μm, meanwhile up to 95% increment in elongation at break and 115% increment in fracture energy is achieved. Abstract :