ABSTRAK
Telah dilakukan penelitian pengaruh jenis inisiator, jenis surfaktan dan waktufeeding monomer dari kopolimer Butil akrilat-Asam metakrilat terhadap kinerjapressure sensitive adhesives berbasis air. Proses polimerisasi dilakukanmenggunakan teknik seeding melalui polimerisasi radikal bebas pada temperaturreaksi 85±1 oC dengan kecepatan pengadukan 200 rpm.Tipe inisiator divariasimenggunakan APS dan KPS, surfaktan menggunakan LDBS dan SLS sertawaktu feeding dibuat 2, 3 dan 4 jam. Parameter polimer PSA seperti : totalpadatan, viskositas, pH, tegangan permukaan, ukuran partikel, tack, shear danadhesion diuji. Variasi inisiator, surfaktan dan waktu feeding tidakmempengaruhi total padatan, viskositas, pH dan tegangan permukaan polimerPSA. Efek variasi inisiator, surfaktan dan waktu feeding monomermempengaruhi ukuran dan distribusi ukuran partikel dimana ukuran partikelpaling kecil diperoleh dari kombinasi antara inisiator KPS, surfaktan SLS danwaktu feeding 3 jam. Sedangkan kinerja secara keseluruhan dari polimer PSAdidapat dari kombinasi antara inisiator APS, surfaktan LDBS dan waktu feeding2 jam dengan parameter tack : 4 cm, shear : 18 menit dan adhesion : 6,56 N
ABSTRACT
A research has been conducted to investigate the effect of various initiator,surfactant and feeding time of Buthyl acrylate-Methacrylic acid copolymer on theperformance of water based pressure sensitive adhesives. Polymerization wasdone by seeding technique through free radical polymerization at the reactiontemperature 85±1 oC and the speed of agitation 200 rpm. Initiator was varied byusing Ammonium persulfate and Potassium persulfate, surfactant using LDBSand SLS then feeding time was made in 2, 3 and 4 hours. The parameter of PSApolymer i.e solid content, viscosity, pH, surface tension, particle size, tack, shearand adhesion were tested. The variation of initiator, surfactant and feeding timedid not effected solid content, viscosity, pH and surface tension of PSA polymer.Variation of initiator, surfactant and feeding time influenced particle size anddistribution particle size where the smallest particle size were achieved bycombination initiator Potassium persulfate, surfactant SLS and feeding time ofmonomer 3 hours. Overall, the performance of PSA polymer was achieved bycombination initiator Ammonium persulfate, surfactant LDBS and feeding time ofmonomer 2 hours with parameters tack: 4 cm, shear: 18 minutes andadhesion: 6,56 N. |
