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以废弃聚苯乙烯(EPS)泡沫塑料为原料,甲苯、乙酸乙酯和丙酮为混合溶剂,制备溶剂型EPS胶粘剂。着重探讨了增黏树脂含量、热塑性弹性体SBS(苯乙烯-丁二烯-苯乙烯嵌段共聚物)含量对EPS胶粘剂剪切强度、黏度和热稳定性等影响。研究结果表明:当V(甲苯)∶V(乙酸乙酯)∶V(丙酮)=52∶48∶3、m(EPS)∶m(松香)=100∶2时,相应EPS胶粘剂对PVC(聚氯乙烯)板的剪切强度(2.54 MPa)相对最大;当V(甲苯)∶V(乙酸乙酯)∶V(丙酮)=52∶48∶3、m(EPS)∶m(酚醛树脂)∶m(SBS)=100∶4∶6时,相应EPS胶粘剂对木材的剪切强度(7.60 MPa)相对较大;适量的增黏树脂和SBS可有效降低EPS胶粘剂的黏度,并且相应EPS胶粘剂的润湿性(对基材)、操作性、粘接强度和EPS胶膜的热稳定性等均有所提高。
Waste polystyrene (EPS) foam as raw material, toluene, ethyl acetate and acetone as a mixed solvent, preparation of solvent-based EPS adhesive. The effects of tackifier resin content, content of thermoplastic elastomer SBS (styrene-butadiene-styrene block copolymer) on the shear strength, viscosity and thermal stability of EPS adhesive were mainly discussed. The results showed that when EPS (toluene): V (acetone) = 52:48:3 and m (EPS): m (rosin) = 100: 2, The shear strength (2.54 MPa) of Vinyl Chloride (Vinyl Chloride) board was the highest relative to V (toluene): V (Acetone) = 52:48:3, m (EPS) (SBS) = 100: 4: 6, the shear strength of the corresponding EPS adhesive to wood (7.60 MPa) is relatively large. The proper amount of tackifying resin and SBS can effectively reduce the viscosity of EPS adhesive, and the corresponding EPS adhesive Wet (on the substrate), handling, adhesive strength and thermal stability of the EPS film are improved.