首页|再生无色聚对苯二甲酸丁二醇酯-co-碳酸丁二醇酯流变性能研究

再生无色聚对苯二甲酸丁二醇酯-co-碳酸丁二醇酯流变性能研究

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有色废旧聚酯纺织品经乙二醇(EG)醇解后,与甲醇(MeOH)酯交换并脱色提纯,得到无色对苯二甲酸二甲酯(DMT);DMT再与1,4-丁二醇(BDO)酯交换得到无色对苯二甲酸双羟基丁二醇酯(BHBT);BHBT与碳酸二甲酯(DMC)和BDO酯交换,得到双甲基碳酸丁二醇酯(BMBC),通过缩聚反应制备出再生无色聚对苯二甲酸丁二醇酯-co-碳酸丁二酯(clr-PBCT)共聚酯.采用毛细管流变仪分别对clr-PBCT60和clr-PBCT70的熔融流变性能进行了测试.结果表明:2种clr-PBCT共聚酯的熔体呈现剪切变稀现象,具有非牛顿流体的流动特征;当剪切速率小于1100 s-1时,clr-PBCT60的可纺性要优于clr-PBCT70;二者的非牛顿指数n均小于1,且随着测试温度的提高而增大;其粘流活化能(△Eη)则随剪切速率的增加而减小,且clr-PBCT60共聚酯的△Eη明显低于clr-PBCT70;当剪切速率小于1100 s-1时,clr-PBCT60样品熔体的结构黏度指数低于clr-PBCT70样品,剪切速率增大时则相反.
Study on Rheological Property of Colorless Regenerated Poly (Terephthalate-co-butylene Carbonate) Copolyster
Colored post-consumer polyester textiles were first alcoholized by ethylene glycol (EG),and the alcohol-ysis were then transesterified with methanol (MeOH ) .The transesterification products were decolorized and puri-fied to prepare colorless dimethyl terephthalate (DMT).It is then exchanged with 1,4-butanediol (BDO) to obtain colorless dihydroxybutanediol terephthalate (BHBT ) .And then,the regenerated colorless clr-PBCT copolyester was prepared by polycondensation of BHBT and dimethyl butylene carbonate (BMBC) which synthesized by trans-esterification of dimethyl carbonate (DMC) and 1,4-butanediol (BDO).The melting rheological properties of clr-PBCT60 and clr-PBCT 70 were tested by using capillary rheometer.The results show that,the melt of the two sam-ples exhibited shear thinning phenomenon,exhibiting non Newtonian fluid flow characteristics;When the shear rate-was less than 1100 s-1,the spinnability of clr-PBCT60 was better than that of clr-PBCT70 .The non-Newtonian ex-ponents (n) of both samples were less than 1 and increased with the increase of testing temperature.Its viscous flow activation energy (△Eη) decreased with the increase of shear rate,and the value of clr-PBCT60 were significantly lower than that of clr-PBCT70 sample.When the shear rate was less than 1100 s-1,the melt structural viscosity in-dex of clr-PBCT60 was lower than that of clr-PBCT70,and the opposite was true when the shear rate increased.

waste colored polyester textilesregenerated uncolor poly (terephthalate-co-butylene carbonate ) copolysterrheological propertyviscous flow activation energy(Eη)structural viscosity index(△η)

裴婷婷、梁日辉、卜雯玥、杨中开、赵国樑

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北京服装学院材料设计与工程学院,北京100029

废旧有色聚酯纺织品 再生无色聚对苯二甲酸丁二醇酯-co-碳酸丁二醇酯 流变性能 粘流活化能Eη 结构黏度指数(△η)

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H2020-30

2024

10.16454/j.cnki.issn.1001-0564.2024.02.003

北京服装学院学报(自然科学版)
北京服装学院

北京服装学院学报(自然科学版)

影响因子：0.17
ISSN：1001-0564
年,卷(期)：2024.44(2)
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