polymerjournals Chemistry, materials, technology
Polymers and Polymer Composites

COATED NANO-SIZED CACO”3 REINFORCED SEMI-CRYSTALLINE EPDM

May 1, 2006 By: Yabin Zhou; Shifeng Wang; Yong Zhang; Yinxi Zhang Research article

Title: COATED NANO-SIZED CACO”3 REINFORCED SEMI-CRYSTALLINE EPDM
Page Range: p.527-536
Author(s): Yabin Zhou; Shifeng Wang; Yong Zhang; Yinxi Zhang
File size: 339K
Download the pdf (subscribers only)
Buy the pdf (non-subscribers)
Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 14
Issue No: No. 5

Abstract
Nano-sized calcium carbonate modified with stearic acid was used to reinforce semi-crystalline EPDM and for comparison, micron-sized calcium carbonate was also studied. It was found that both nanosized and micron-sized calcium carbonate fillers improved the mechanical properties of the EPDM vulcanisates and that the nanofiller exhibited better reinforcement than the microfiller. The difference in reinforcement effects was explained in terms of the filler particle size and the crosslink density of the vulcanisates. The nanofiller was also modified by titanate, borate, and aluminate-titanate complex coupling agents and used to reinforce EPDM vulcanisates. Results showed that the titanate coupling agent-coated nanosized filler exhibited the best reinforcement ability. FE-SEM showed that stearic acid, titanate and aluminate-titanate coupling agents improved the dispersion of the filler in the rubber matrix, whereas borate coupling agents could not. The effect of modified nano-sized calcium carbonate on the dynamic mechanical properties was also studied. Incorporate of calcium carbonate was found to reduce the glass transition temperature of the vulcanisates, with micro-sized calcium carbonate depressing the TG to a greater extent. 21 refs.

Related reading

More journal reading and science coverage connected to this topic.