Silicone Chain Extender for Recycled Polyethylene-terephthalate with Higher Flexibility
来源期刊:Journal Of Wuhan University Of Technology Materials Science Edition2019年第5期
论文作者:王莉 HAO Tonghui HUANG Long HUANG Ji 黄容华
文章页码:1228 - 1232
摘 要:To decrease the modulus and increase the mechanical properties of recycled PET by introducing the flexible segments, the recycled polyethylene-terephthalate(PET) was modified by the chain extender produced with 2, 4, 6, 8-tetramethyl-2, 4, 6, 8-tetra(2, 3-epoxypropoxy) propylcyclotetrasiloxane by the hydrosilylation reaction. Different percentages of chain extender were used in order to investigate the effect of chain extender content on the modulus of PET. The dynamic mechanical analysis was performed on PET samples, which showed that Tg of PET was firstly raised by the addition of chain extender and then decreased. Small amplitude shearing test performed on PET samples confirmed that the addition of the flexible segments could remarkably decrease the modulus of PET, which would be helpful for the extrusion process. The entanglements from branches were also influenced by the addition of extender.
王莉1,2,HAO Tonghui3,HUANG Long4,HUANG Ji2,黄容华2
1. North China University of Water Resources and Electric Power2. School of Power & Mechanical Engineering, Wuhan University3. School of Materials Science & Engineering, Hubei University4. Engineering Center of New Tobacco Product,China Tobacco Hubei Industrial Co Ltd
摘 要:To decrease the modulus and increase the mechanical properties of recycled PET by introducing the flexible segments, the recycled polyethylene-terephthalate(PET) was modified by the chain extender produced with 2, 4, 6, 8-tetramethyl-2, 4, 6, 8-tetra(2, 3-epoxypropoxy) propylcyclotetrasiloxane by the hydrosilylation reaction. Different percentages of chain extender were used in order to investigate the effect of chain extender content on the modulus of PET. The dynamic mechanical analysis was performed on PET samples, which showed that Tg of PET was firstly raised by the addition of chain extender and then decreased. Small amplitude shearing test performed on PET samples confirmed that the addition of the flexible segments could remarkably decrease the modulus of PET, which would be helpful for the extrusion process. The entanglements from branches were also influenced by the addition of extender.
关键词: