Abstract
A series of flame-retardant nanocomposites were established based on compounding of natural rubber (NR) and dendrimer modified flame-retardant organic montmorillonite (FR-DOMt). The merits of these nanocomposites were focused on their better mechanical and flame-retardant properties. X-ray diffractometer (XRD) together with scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis revealed that exfoliation, intercalation, or aggregation status in the NRmatrix can be achieved by addition of different amounts of FR-DOMt. The sound effects of blend ratio of FR-DOMt on mechanical, thermal stability, and flame-retardant (FR) properties of NR were studied. The NR/FR-DOMt-20 composite possessed the highest tensile strength, and this resulted from complicated interactions between layered silicates and elastomers. In addition, with loading of 20 phr of FR-DOMt, the flammability parameters of NR, such as heat release rate (HRR), smoke evolution area (SEA), and carbon monoxide (CO) concentration, were obviously reduced from cone calorimeter analysis.
Highlights
In order to reduce polymer consumption and production cost, clay minerals including montmorillonite (Mt), saponite, hectorite, etc., were widely used as fillers in polymeric industry for many years [1]
The preparation process of flame-retardant organic montmorillonite (FR-DOMt) was presented in Scheme 1
FR-DOMt wasexhibited fabricated that fromthis an FRDOMt possessedreaction good thermal
Summary
In order to reduce polymer consumption and production cost, clay minerals including montmorillonite (Mt), saponite, hectorite, etc., were widely used as fillers in polymeric industry for many years [1]. Khanlari et al [17] studied the thermal stability, flame-retardance together with the hardness and mechanical properties with addition of organoclay in NR nanocomposites. Liu et al [18] researched the nanocomposites of NR and tributyl phosphate modified Mt (TMt) by the mixing intercalation method Their flame-retardant property was tested by cone calorimeter analysis. It was disclosed that the employment of dendrimers can increase the d001-value and thermal stability of organoclay This dendrimer containing phosphorus and boron elements behaved like a surfactant for surface modification. The NR nanocomposite with 20 phr of FR-DOMt exhibited better mechanical properties This NR nanocomposite possessed excellent thermal stability and flame-retardance
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