Synergistic Effects of Nanoporous Nickel Phosphates VSB-1 on an Intumescent Flame-Retardant Low-Density Polyethylene (LDPE) System |
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| Authors: | Shibin Nie Lei Song Qilong Tai Jing Zhan Hongdian Lu |
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| Affiliation: | 1. State Key Laboratory of Fire Science, University of Science and Technology of China , Hefei, Anhui, China;2. Department of Polymer Science and Engineering , University of Science and Technology of China , Hefei, Anhui, China;3. State Key Laboratory of Fire Science, University of Science and Technology of China , Hefei, Anhui, China;4. Department of Polymer Science and Engineering , University of Science and Technology of China , Hefei, Anhui, China;5. Department of Chemical and Materials Engineering , Key Laboratory of Powder and Energy Materials, Hefei University , Hefei, Anhui, China |
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| Abstract: | Nanoporous nickel phosphates VSB-1 was synthesized by hydrothermal method, and its structure was characterized by X-ray diffraction (XRD), thermogravimetric analyses (TGA) and high resolution transmission electron microscopy (HRTEM). The flame retardancy and thermal behaviour of intumescent flame retardants (IFR) with and without VSB-1 for low-density polyethylene (LDPE) were evaluated by LOI, UL-94 burning test, TGA and cone calorimeter test. With the addition of 2 wt% VSB-1 to LDPE/IFR systems, the LOI value increases from 28.7 to 31, and UL-94 rating raises from V-1 rating to V-0 rating. The results of cone calorimeter show that heat release rate (HRR) peak decrease substantially from 511 KW/m2 to 407 KW/m2 with 2 wt% VSB-1 in LDPE/IFR systems. The scanning electron microscopy (SEM) indicates the quality of char forming of LDPE/IFR/ VSB-1 is superior to that of LDPE/IFR. |
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| Keywords: | Intumescent flame-retardant (IFR) LDPE Nanoporous nickel phosphates Synergistic effect |
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