聚乙烯蜡的丙烯酸接枝改性及乳化工艺

以丙烯酸为单体,叔丁基过氧化氢（TBHP）为引发剂,二甲苯为溶剂,对聚乙烯蜡进行接枝改性。结果表明,当m（引发剂）∶m（聚乙烯蜡）=0.5∶100,m（丙烯酸）∶m（聚乙烯蜡）=15∶100,m（二甲苯）∶m（聚乙烯蜡）=300∶100,反应温度为120℃,反应时间6 h的条件下,可制得酸值为14 mg KOH/g蜡的...

Grafted Modification with Acrylic Acid and Emulsifying Process of Polyethylene

Modified polyethylene wax(PE) was prepared with grafted reaction,monomer is acrylic acid,initiator is tert-butyl hydroperoxide(TBHP),and solvent is xylene.The result shows the modified PE(MPE) with acid value is 14 mg KOH/g wax could be prepared,the conditions are: m(initiator)∶m(PE)=0.5∶100,m(monomer)∶m(PE)=15∶100,m(xylene)∶m(PE)=300∶100;reaction temperature,120 ℃;Reaction time,6 hours.IR spectrum shows that carboxyl group has been imported into the molecular of PE.Phase inversion and shearing were used in the emulsifying.Emulsifying experiment shows the grafted PE is easy to emulsify compare to the PE.Using combination emulsifiers of fatty alcohol polyoxyethylene ether(OS15)and sodium lauryl sulfate,m(OS15)∶m(MPE)=10∶100,and m(lauryl sulfate)∶m(MPE)=5∶100,90 ℃～95 ℃ of emulsifying temperature,continuously stirring for 30 min～40 min,steady modified PE emulsion can be prepared,average particle diameter of which is 5.8 μm.