LDPE, EVA, EPDM foam EPM modified to enhance the preparation

Title: LDPE, EVA, EPDM foam EPM modified to enhance the preparation and properties of
　　Author: Zhuang Jiangjiang
　　Degree-granting units: Fujian Normal University
　　Keywords: EPM;; LDPE;; EVA;; EPDM;; modified clay;; mixing plastics;; molded foam;; modified EPM foam
　　Abstract: EPM as the basic raw material, LDPE, EVA, EPDM for the modified materials, rare earth aluminum acetate modified clay as a filler, the use of mixing plastics, double roller mixing, molding foam prepared by foaming modified EPM materials. Neodymium magnets Intelligent foam with no rotor rheometer analysis of LDPE, EVA, EPDM and so on EPM vulcanization time (T90), torque value, foaming gas pressure, and scanning electron microscopy LDPE, EVA, EPDM and other foam on the EPM After the bubble hole diameter of the impact, analysis and testing of LDPE, EVA, EPDM, EAA, AC, DCP and other content on the modified EPM foam physical and mechanical properties. The results showed that: rare earth aluminate coupling by 4% modified clay, the water absorption time of 326.68s, lipophilic degree of 17.8% in the 2851cm-1 and 2920cm-1 near the new absorption peak, with 20% change of clay material physical and mechanical properties of EPM good; LDPE content increased, EPM / LDPE foam curing process MH, ΔM are significantly lower, with 30 of LDPE EPM / LDPE foam foam structured, reduce shrinkage ; EAA content increased, molded foam process EPM / EVA / EAA blends MH, ΔM lower, T90 extension, when the EAA dosage of 20, the foam tearing strength increased 58.3%, tensile strength 12.0 %; when EPDM content is 20 phr, EPM / EPDM material http://www.chinamagnets.biz/Neodymium/Ball-Neodymium-Magnets.php T90 extended to 77s, gel rate, elongation at break, tensile strength, tear strength are the best, high shrinkage and density; EPM / EPDM at a temperature of 453K (180 ℃) obtained when the foam skin smooth, good performance, cross-linking reaction rate and the rate of blowing agent decomposition ratio v: r = 0.58; optimized formulations prepared EPM / EPDM foam materials, tensile strength 2.66MPa, elongation at break of 599.7%, right angle tear strength 11.023 KN / m, 2.5% shrinkage, excellent physical and mechanical properties.
　　Degree Year: 2010