کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5183141 | 1381010 | 2012 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Molecular-level dispersion of phosphazene-clay hybrids in polyurethane and synergistic influences on thermal and UV resistance Molecular-level dispersion of phosphazene-clay hybrids in polyurethane and synergistic influences on thermal and UV resistance](/preview/png/5183141.png)
Amine substitution of hexachlorocyclotriphosphazene with poly(oxyethylene-oxypropylene)-monoamines afforded aminophosphazenes (AP) at molecular level with the structure of rigid phosphazene core and flexible alkoxy shell. Sodium montmorillonite were modified by using HCl-treated AP to prepare AP-exfoliated MMT clay (AP/EMMT) nanohybrids. When blending the nanohybrid into PU, the presence of silicate platelets promoted the PU stability and retarded the degradation for more than 60 °C under the standard TGA measurement. The co-existence of AP and EMMT at various weight ratios demonstrated a synergistic effect on the improvements of thermal stability as well as the UV resistance under the standard test of UV exposure in wavelength range of 365-400 nm. The molecular-level dispersion of AP and silicate platelets had synergistically contributed to the PU thermal and UV stability.
Journal: Polymer - Volume 53, Issue 19, 31 August 2012, Pages 4060-4068