两类聚酯吸氧材料的制备及性能

Preparation and property of two kinds of polyester oxygen scavenger material

制备了1,4-丁烯二醇/顺丁烯二酸酐和端羟基聚丁二烯(HTPB)/顺丁烯二酸酐酯化物吸氧剂,讨论了反应时间及醇酐比对吸氧剂酯化率的影响,并且将1,4-丁烯二醇/顺酐、HTPB/顺酐吸氧剂接枝共聚到PET中得到改性吸氧材料。考察了两种吸氧材料的物理性能和吸氧性能,以及影响吸氧性能的双键保留率,催化剂用量、醇酐比。实验表明,顺酐与1,4-丁烯二醇、HTPB反应的最佳酯化时间分别为2 h和3 h,含1,4-丁烯二醇/顺酐和HTPB/顺酐的吸氧材料最大数均分子量分别为3.66万和4.97万,最大双键保留率分别为77.4%和76.3%,最大催化剂用量为1.0 g/kg,含1,4-丁烯二醇/顺酐和HTPB/顺酐的吸氧材料24 h最大吸氧量为3.17 mL/g和10.04mL/g。

Maleic anhydride/2-butene-1,4-diol and maleic anhydride/terminated polybutadiene oxygen scavenger have been prepared by esterification.The influence of reaction time and ratio of alcohol-anhydride on the esterification rate has been discussed,and maleic anhydride/2-butene-1,4-diol and maleic anhydride/terminated polybutadiene oxygen scavenger have been grafted to PET for preparing oxygen scavenger material.Physical property and oxygen absorption of oxygen scavenger material of 2-butene-1,4-diol and terminated polybutadiene were investigated.Retained ratio of double bonds,catalyst amount,and ratio of alcohol-anhydride were investigated.The results showed the optimal preparation condition of 2-butene-1,4-diol oxygen scavenger reaction time would be 2h under which maleic anhydride esterification rate reached 62.55%,maximum number-average molar mass of 2-butene-1,4-diol oxygen scavenger material reached 36607,retained maximum ratio of double bonds of 2-butene-1,4-diol oxygen scavenger material reached 77.4%,the absorbed oxygen volume of 2-butene-1,4-diol oxygen scavenger material would be 3.17 mL,maximum catalyst amount of 2-butene-1,4-diol oxygen scavenger material and terminated polybutadiene oxygen scavenger material reached 1.0 g/kg.Terminated polybutadiene oxygen scavenger reaction time would be 3h under which maleic anhydride esterification rate reached 59.38%,the absorbed oxygen volume of terminated polybutadiene oxygen scavenger material would be 10.04 mL,maximum number-average molar massof terminated polybutadiene oxygen scavenger material reached 49735,maximum ratio of double bonds of 2-butene-1,4-diol oxygen scavenger material reached 76.3%.