the effect of zn-al-hydrotalcites composited with calcium stearate and β-diketone on the thermal stability of pvc的影响zn-al-hydrotalcites合成硬脂酸钙和β-diketone聚氯乙烯的热稳定性.pdf

Int. J. Mol. Sci. 2011, 12, 1756-1766; doi:10.3390/ijm OPEN ACCESS International Journal of Molecular Sciences ISSN 1422-0067 /journal/ijms Article The Effect of Zn-Al-Hydrotalcites Composited with Calcium Stearate and β-Diketone on the Thermal Stability of PVC Mengliang Tong 1, Hongyan Chen 2, Zhanhong Yang 2,* and Runjuan Wen 2 1 Hunan Chemical Vocational and Technical College, Zhuzhou 412004, China; E-Mail:163.com 2 College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; E-Mails: chykn0@163.com (H.C.); wrj20050440076@163.com (R.W.) * Author to whom correspondence should be addressed; E-Mail: zhyang@; Tel.: +86-731 Received: 26 January 2011; in revised form: 9 February 2011 / Accepted: 7 March 2011 / Published: 8 March 2011 Abstract: A clean-route synthesis of Zn-Al-hydrotalcites (Zn-Al-LDHs) using zinc oxide and sodium aluminate solution has been developed. The as-obtained materials were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). The effects of metal ions at different molar ratios on the performance of hydrotalcites were discussed. The results showed that the Zn-Al-hydrotalcites can be successfully synthesized at three different Zn/Al ratios of 3:1, 2:1 and 1:1. Thermal aging tests of polyvinyl chloride (PVC) mixed with Zn-Al-LDHs, calcium stearate (CaSt