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Polymer-Plastics Technology and Engineering Volume 51, 2012 - Issue 6
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Original Articles

Study on Flame-Retardant LLDPE/EPDM Thermoplastic Elastomers with Magnesium Hydroxide Sulfate Hydrate Whiskers

Hongdian Lu Department of Chemical and Materials Engineering, Key Laboratory of Powder and Energy Materials, Hefei University, Hefei, Anhui, P.R. ChinaCorrespondence[email protected]
,
Jianguo Shao Anhui Research Institute of Chemical Industry, Hefei, Anhui, P.R. China
,
Ming Ding Department of Chemical and Materials Engineering, Key Laboratory of Powder and Energy Materials, Hefei University, Hefei, Anhui, P.R. China
,
Difang Zhao Department of Chemical and Materials Engineering, Key Laboratory of Powder and Energy Materials, Hefei University, Hefei, Anhui, P.R. China
&
Changan Tian Department of Chemical and Materials Engineering, Key Laboratory of Powder and Energy Materials, Hefei University, Hefei, Anhui, P.R. China
Pages 578-582 | Published online: 27 Apr 2012
 
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Abstract

The mechanical properties and flame retardancy of linear low-density polyethylene/ethylene-propylene-diene terpolymer thermoplastic elastomers (TPEs) containing magnesium hydroxide sulfate hydrate (MHSH) whiskers and their corresponding un-vulcanized blends (UVBs) were evaluated using static tensile measurements, cone calorimetry and limiting oxygen index (LOI) tests. TPEs exhibited better fire-resistant properties in reducing peak heat release rate and improving LOI values to UVBs. Scanning electron microscopy (SEM) images showed that TPE sample left a more compact char after cone test. Results from tensile tests confirmed that TPEs had superior mechanical properties to UVBs due to the better compatibility between MHSH whiskers and polymer matrix.

ACKNOWLEDGMENTS

The work was financially supported by the National Natural Science Foundation of China (No. 50903080) and the China Postdoctoral Science Foundation (200902295).

Notes

Vulcanizing system for TPEs is 12.5 phr of EPDM (SP-1045/SnCl2/ZnO = 10/1/1.5). Weight ratio of (LLDPE+MAPE+vulcanizing system)/EPDM is 2/1 for TEP 4 and 6–9.

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