Preparation and property of two kinds of polyester oxygen scavenger material

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%.