纺织学报 ›› 2019, Vol. 40 ›› Issue (06): 1-7.doi: 10.13475/j.fzxb.20180507007

• 纤维材料 •    下一篇

生物基聚酰胺56低聚物改性聚酯的合成及其表征

张腾飞1, 石禄丹2, 胡红梅1, 王宇1, 王学利3(), 俞建勇3   

  1. 1.东华大学 纺织学院, 上海 201620
    2.东华大学 机械工程学院, 上海 201620
    3.东华大学 纺织科技创新中心, 上海 201620
  • 收稿日期:2018-05-29 修回日期:2019-03-14 出版日期:2019-06-15 发布日期:2019-06-25
  • 通讯作者: 王学利
  • 作者简介:张腾飞(1993—),男,硕士生。主要研究方向为聚酯改性。
  • 基金资助:
    国家重点研发计划项目(2017YFB0309400);“纺织之光”中国纺织工业联合会应用基础研究项目(J201402)

Synthesis and characterization of bio-based polyamide 56 oligomer modified polyester

ZHANG Tengfei1, SHI Ludan2, HU Hongmei1, WANG Yu1, WANG Xueli3(), YU Jianyong3   

  1. 1. College of Textiles, Donghua University, Shanghai 201620, China
    2. College of Mechanical Engineering, Donghua University, Shanghai 201620, China
    3. Innovation Center For Textile Science and Technology, Donghua University, Shanghai 201620, China
  • Received:2018-05-29 Revised:2019-03-14 Online:2019-06-15 Published:2019-06-25
  • Contact: WANG Xueli

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摘要：

为改善聚酯(PET)的亲水性,采用生物基聚酰胺56低聚物(LPA56)对聚酯进行共聚改性制备新型聚酰胺酯共聚物。借助核磁共振波谱仪、傅里叶红外光谱仪、X射线衍射仪和光学接触角测量仪等对新型聚酰胺酯的结构和性能进行表征与分析。结果表明:新型聚酰胺酯共聚物兼具酯类和酰胺类特征官能团振动峰,且LPA56的反应率达到80%以上;共聚物的晶型和聚酯晶型相同,但其结晶度随着LPA56质量分数的增加而逐渐降低;随着LPA56质量分数的增加,共聚物的玻璃化转变温度、熔点逐渐降低,但其对共聚物热稳定性影响较小;当加入质量分数为5% 的LPA56时,共聚物的静态接触角从91.5°降低至70.3°;改性后PET纤维的回潮率是改性前的265%,并随着LPA56质量分数的增加而逐渐提高。

关键词: 聚酰胺56, 聚酰胺酯, 改性聚酯, 结晶性能, 亲水性能

Abstract:

In view of the poor hydrophilicity of polyester (PET), a novel polyamide ester copolymer was prepared by copolymerization modification of PET with bio-based polyamide 56 oligomer (LPA56). Structure and properties of the novel polyamide esters were characterized and analyzed by nuclear magnetic resonance spectrometer, Fourier transform infrared spectroscopy, X-ray diffractometer and optical contact angle measuring instrument. The results show that the novel polyamide esters have functional peaks of both esters and amides, and the reaction rate of LPA56 is over 80%. The copolymers and polyesters have the same crystal form. However, the crystallinity decreases with the increase of the amount of LPA56 added. The glass transition temperature and melting point of the copolymer gradually decrease with the increase of the amount of LPA56 added, but the thermal stability of the copolymer is less affected. When 5% LPA56 is added, the static contact angle is greatly reduced from 91.5° to 70.3°, and the fiber moisture regain is 265% of the pre-modified PET fiber, and gradually increases with the amount of LPA56 added.

Key words: polyamide 56, polyamide ester, modified polyester, crystallinity, hydrophilic property

中图分类号: 

  • TQ342.21

图1

聚酰胺酯反应式"

表1

原材料投料配比"

样品编号 PTA用量/
mol		 EG用量/
mol		 聚酰胺56低聚物
占比/%
0# 12 16.8 0
1# 12 16.8 5
2# 12 16.8 10
3# 12 16.8 15

图2

聚酰胺酯1H-NMR谱"

图3

不同位置元素标注的聚酰胺酯结构式"

表2

LPA56反应率"

样品编号 理论μLPA56 实际μLPA56 反应率
1# 0.040 0.032 80.0
2# 0.079 0.071 89.9
3# 0.114 0.108 91.2

图4

聚酰胺酯13C-NMR谱"

图5

聚酰胺酯的结构式"

图6

聚酰胺酯红外谱图"

图7

聚酰胺酯广角X射线衍射谱图"

表3

聚酰胺酯广角X射线衍射谱数据"

样品编号 晶面间距/nm 结晶度/%
(010) (11ˉ0) (100)
0# 5.05 3.86 3.44 33.69
1# 5.14 3.90 3.43 27.74
2# 4.96 3.85 3.38 26.80
3# 4.92 3.85 3.39 25.26

图8

聚酰胺酯DSC曲线"

图9

聚酰胺酯的热稳定性曲线"

图10

聚酰胺酯接触角"

图11

聚酰胺酯亲水原理示意图"

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