摘要
采用共沉淀法制备了6种十四烷酸插层稀土(镧/铈/镨/钕/铕/钐)类水滑石,采用X射线衍射、红外光谱及热重分析进行表征。利用刚果红法及转矩流变仪法研究了其对聚氯乙烯(PVC)的热稳定作用,通过紫外光谱分析了热稳定机理。结果表明,6种类水滑石对PVC均具有较好的热稳定作用,其中,掺杂镧的类水滑石的热稳定效果较好,与硬脂酸锌、季戊四醇复配后可延长PVC静态及动态热稳定时间分别为110、35 min,塑化扭矩及平衡扭矩分别为51、30 N·m;类水滑石复配前后都能较好地抑制PVC长链共轭多烯的形成,减缓样品着色,复配后效果尤为突出。
Six kinds of tetradecanoic acid intercalated rare-earth(La/Ce/Pr/Nd/Sm/Eu)hydrotalcite-likes were synthesized by coprecipitation method.The products were characterized by X-ray powder diffraction(XRD),infrared spectrum(FTIR) and themogravimetric analysis(TG).It showed that the products imparted good thermal stability to PVC.The La doped hydrotalcitelikes was the best and exhibited obvious synergistic effect with zinc stearate and pentaerythritol.The static and dynamic thermal stability time reached 110 and 35 min,respectively.The plasticizing torque and balancing torque were 51 and 30 N·m,respectively.UV showed that the product could inhibit the formation of the conjugated polyene with longer chain length and slow down the sample color before and after being compounded,especially after being compound.
出处
《中国塑料》
CSCD
北大核心
2015年第6期93-97,共5页
China Plastics
基金
河北省高等学校科学研究计划资助项目(Z2014066)
唐山市应用基础研究项目(14130242B)
唐山师范学院科学研究基金(2014D04)
关键词
聚氯乙烯
稀土
十四烷酸
水滑石
热稳定剂
poly(vinyl chloride)
rare earth
tetradecanoic acid
hydrotalcite
thermal stabilizer
