共聚酰胺6/66流变性能研究
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摘要
共聚酰胺6/66具有相对于传统聚酰胺6和聚酰胺66更高透明度、更好的柔韧性,因此,在抗冲击单丝、阻隔性包装薄膜和透明工程塑料件方面具有重要的应用优势。本实验采用毛细管流变仪,研究具有不同单体共聚比例共聚酰胺6/66流变性能及相关参数变化规律,并对于研究相同相对黏度共聚酰胺6/66和聚酰胺6的流变行为,发现随共聚单体的变化,聚合物的熔体表观黏度有波动,且在低剪切速率范围内相对明显,共聚第三单体的加入导致共聚体系的黏度更低。共聚比对聚合物粘流活化能的影响不大。随着共聚体系共聚比例的增加,体系非牛顿指数增加。共聚破坏了聚合物分子链结构规整性,导致共聚酰胺的表观黏度有所降低,且具有更高的非牛顿指数和更高的粘流活化能。
Copolyamide 6/66 features higher transparency and better flexibility than conventional polyamide6 and polyamide 66, and therefore has important application advantages in impact monofilament, barrier packaging film and transparent engineering plastic parts. In this paper, capillary rheometer was used to study the rheological properties of co-polyamide 6/66 with different monomer copolymerization ratios and related parameters. It was found that the variation of monomers in the copolymer changed apparent viscosities up and down of copolymers, and is relatively pronounced in the low shear rate range, and the third monomer in copolymer resulted in a lower viscosity. The copolymerization ratio showed little effect on the viscous flow activation energy of the polymer, but an increase tendency was observed with the increased of monomers ratio. Copolymerization destroys the structural regularity of copolyamide 6/66 molecular chain, resulting in a decrease in the apparent viscosity comparing with polyamide 6, but a higher non-Newtonian index and higher viscous activation energy.
Copolyamide 6/66 features higher transparency and better flexibility than conventional polyamide6 and polyamide 66, and therefore has important application advantages in impact monofilament, barrier packaging film and transparent engineering plastic parts. In this paper, capillary rheometer was used to study the rheological properties of co-polyamide 6/66 with different monomer copolymerization ratios and related parameters. It was found that the variation of monomers in the copolymer changed apparent viscosities up and down of copolymers, and is relatively pronounced in the low shear rate range, and the third monomer in copolymer resulted in a lower viscosity. The copolymerization ratio showed little effect on the viscous flow activation energy of the polymer, but an increase tendency was observed with the increased of monomers ratio. Copolymerization destroys the structural regularity of copolyamide 6/66 molecular chain, resulting in a decrease in the apparent viscosity comparing with polyamide 6, but a higher non-Newtonian index and higher viscous activation energy.
引文
[1]朱建民.聚酰胺纤维[M].北京:化学工业出版社, 2014∶4-5.
[2]林涛,颜春,翁睿,张修平,余海涛.环保高效聚酰胺阻燃剂的研究进展[J].塑料科技, 2017(5):114-118.
[3]何建辉,熊华富,李湘平,周卫东,吴滚滚.低熔点聚酰胺的合成与应用研究进展[J].合成纤维工业, 2017(1):54-59.
[4]别群梅,张克杰,王洪斌,方乃照,韩冰.半芳香聚酰胺的合成及应用进展[J].广东化工,2012, 39(14):66-67.
[5]王亚慧,张润东,崔莉.增塑剂/成核剂对PLLA/PDLA共混熔体流变纺丝性能影响[J].北京服装学院学报, 2017(4):14-22.
[6]郭威男,赵彩霞,陈春银,马建莉,林杉,王标兵.尼龙6/POE/EVOH共混物的流变性能[J].塑料, 2012(1):58-60, 54.
[7] He Pingsheng. Structure and Properties of Polymers[M]. Science Press and Alpha Science International Ltd., 2014:320-333.
[2]林涛,颜春,翁睿,张修平,余海涛.环保高效聚酰胺阻燃剂的研究进展[J].塑料科技, 2017(5):114-118.
[3]何建辉,熊华富,李湘平,周卫东,吴滚滚.低熔点聚酰胺的合成与应用研究进展[J].合成纤维工业, 2017(1):54-59.
[4]别群梅,张克杰,王洪斌,方乃照,韩冰.半芳香聚酰胺的合成及应用进展[J].广东化工,2012, 39(14):66-67.
[5]王亚慧,张润东,崔莉.增塑剂/成核剂对PLLA/PDLA共混熔体流变纺丝性能影响[J].北京服装学院学报, 2017(4):14-22.
[6]郭威男,赵彩霞,陈春银,马建莉,林杉,王标兵.尼龙6/POE/EVOH共混物的流变性能[J].塑料, 2012(1):58-60, 54.
[7] He Pingsheng. Structure and Properties of Polymers[M]. Science Press and Alpha Science International Ltd., 2014:320-333.