多功能性二元受阻胺类光稳定剂的合成与性能

Synthesis and Properties of Multifunctional Binary Hindered Amine Light Stabilizers

摘要:

以三聚氯氰，2,2,6,6-四甲基哌啶-4-醇为原料得到中间体化合物2,4-二(哌啶-4-氧基)-6-氯-s-三嗪化合物(IIa和IIb)，再与2-羟基苯并三唑类衍生物(IIIa，IIIb和IIIc)反应，得到6个二元受阻胺类光稳定剂化合物(IV)。用1H NMR、IR和ESI-HRMS确定了目标产物的结构。初步研究了其紫外吸收性能、热稳定性能和光稳定性能。结果显示：6个化合物在360nm左右均有较强的吸收，最大摩尔消光系数ε分别为3.67×105 L•mol-1•cm-1、4.06×105 L•mol-1•cm-1、4.22×105 L•mol-1•cm-1、3.99×105 L• mol-1• cm-1、4.65×105 L•mol-1• cm-1, 5.31×105 L•mol-1•cm-1；6种光稳定剂的热和光稳定性能良好，其光稳定剂失重1%（质量分数）时的温度依次为：210 ℃、225 ℃、224 ℃、238 ℃、181 ℃和185℃，当掺杂光稳定剂化合物的样品的质量分解率达到10%的时候，所需要时间大于100 h。

Abstract:

A series of multifunctional binary hindered amine light stabilizers(HALSs) were synthesized from cyanuric chloride, 2,2,6,6-tertramethypiperidine-4-ol and 2-hydroxyphenylbenzotriazole derivatives nucleophilic substitution. The new light stabilizers were confirmed by 1H NMR, IR and ESI-HRMS. And properties of six compounds had been studied, such as UV-Vis absorption, thermal stability and light stability. The results show that they have strong absorption in about 360nm, The maximum molar absorption coefficient (ε×105/L•mol-1•cm-1) was 3.67, 4.06, 4.22, 3.99, 4.65, 5.31, respectively. The oxi-dation resistance and photostabilization efficiency of six compounds can considerably improve the oxi-dation resistance and polymer photostability. The temperature of the TGA tests spectra of compound are 210 ℃, 225 ℃, 224 ℃, 238 ℃, 181 ℃ and 185℃, resectively. The time of mass decomposition rate of the copolymers is longer than 100h.