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- Title
硼酸盐对阻燃 PP 复合材料性能的影响.
- Authors
李臻; 杨丽庭; 李彦涛; 黄文杰; 卜晋纶; 曾聪
- Abstract
The flame—retardant polypropylene ( PP) composites doped with a small amount of colemanite (CB) or zinc borate (ZB) were prepared with the melt blending extrusion method. The influence of CB and ZB on the combustion properties, thermal stability, mechanical properties and crystallization of flame—retardant PP composites filled with melamine—coated ammonium polyphosphate (APP-102) and melamine cyanurate (MCA) were studied. The results showed that a small amount of CB or ZB (2.0%) can effectively improve flame retardancy of PP composites, the LOI value were improved from 25.7% to 27.6% and 27.7% respectively, the UL-94 rating was increased from V-2 to V-0, and the peak heat release (pHRR) and total heat release (HRR) were reduced slightly. CB and ZB could effectively improve the thermal stability of flame—retardant PP composites, and boron could pro-mote the formation of a continuous and compact char layer on the surface. The addition of a small amount of CB or ZB did not deteriorate the mechanical properties of the flame—retardant PP composites, and the tensile modulus and flexural modulus were slightly increased. At the same time,the crystallization rate and crystallinity of flame—retardant PP composites with a small amount of CB or ZB were improved. Therefore, CB was similar to ZB and could be used in synergistic flame retardation of PP.
- Publication
Journal of South China Normal University (Natural Science Edition) / Huanan Shifan Daxue Xuebao (Ziran Kexue Ban), 2021, Vol 53, Issue 2, p35
- ISSN
1000-5463
- Publication type
Article
- DOI
10.6054/j.jscnun.2021024