软段结构对无溶剂聚氨酯树脂微相分离的影响

doi:10.19398/j.att.202111026

现代纺织技术 ›› 2022, Vol. 30 ›› Issue (5): 74-81.DOI: 10.19398/j.att.202111026

软段结构对无溶剂聚氨酯树脂微相分离的影响

杨浩¹, 田千俊¹, 石磊², 王淋¹, 黄志超¹, 戚栋明¹

1.浙江理工大学纺织科学与工程学院(国际丝绸学院),杭州 310018;
2.浙江禾欣科技有限公司,浙江嘉兴 314000

收稿日期:2021-11-13 出版日期:2022-09-10 网络出版日期:2022-09-19
通讯作者:黄志超,E-mail: hzczist@sina.com
作者简介:杨浩(1996-),男,湖北孝感人,硕士研究生,主要从事无溶剂聚氨酯合成革方面的研究。
基金资助:
浙江省重点研发计划项目(2020C01148);浙江理工大学科研启动项目(19012095-Y);浙江省科技厅公益项目(LGG22E030011)

The effects of soft segments on microphase separation of solvent-free polyurethane resin

YANG Hao¹, TIAN Qianjun¹, SHI Lei², WANG Lin¹, HUANG Zhichao¹, QI Dongming¹

1. College of Textile Science and Engineering (International Institute of Silk),Zhejiang Sci-Tech university, Hangzhou 310018,China;
2. Zhejiang Hexin Science and Technology Co., Ltd., Jiaxing 310018, China

Received:2021-11-13 Published:2022-09-10 Online:2022-09-19

摘要/Abstract

摘要： 分别以聚己内酯二醇(PCL)、聚碳酸酯二醇(PCDL)、聚四氢呋喃二醇(PTMEG)、聚氧化丙烯二醇(PPG)为软段,改性二苯基甲烷二异氰酸酯(MDI)和1,4-丁二醇(BDO)为硬段,采用双组份预聚物原位共混聚合法制备了4种无溶剂聚氨酯(SFPU)树脂膜。通过傅里叶红外、X射线衍射、差示扫描量热、拉伸试验、动态力学性能分析等方法,考察了软段结构对SFPU膜微相分离及其结晶性、热性能和机械性能的影响。结果表明:弱极性软段且无侧基的PTMEG-SFPU具有高的微相分离程度、结晶性和热稳定性,并且其玻璃化温度低至 -58.6 ℃,断裂伸长率高达371.1%;强极性软段的PCDL-SFPU具有低的微相分离程度,软硬段相容性好,玻璃化温度较高,拉伸强度达到32.7 MPa,模量达23.3 MPa。

关键词: 无溶剂聚氨酯, 软段结构, 极性, 热性能, 微相分离

Abstract: Four kinds of solvent-free polyurethanes(SFPU) resin films were prepared by two-component prepolymer in-situ blending polymerization,in which modified diphenylmethane diisocyanate (MDI) and 1,4-butanediol (BDO) acted as hard segments and Polycaprolactone diol(PCL), polycarbonates of 1,6-hexanediol (PCDL), poly (tetramethylene oxide glycol) (PTMEG) and polyoxypropylene glycol (PPG) acted as soft segments, respectively.The effects of soft segment structure on the microphase separation, crystallinity, thermal and mechanical properties of SFPU were investigated by Fourier transforminfrared,X-ray diffraction, differential scanning calorimetry, tensile test and dynamic mechanical property analysis.The results show that PTMEG-SFPU with weak polarity and unbranched chain has high degree of microphase separation, crystallinity and thermal stability.Besides, its glass transition temperatureis as low as -58.6 ℃ and the elongation at break is as high as 371.1%.The highly polar PCDL-SFPU has a weak degree of microphase separation, good compatibility between soft and hard segments, and a higher glass transition temperature. The tensile strength of PCDL-SFPU reaches 32.7 MPa and modulus reaches 23.3 MPa.

Key words: solvent-free polyurethane, soft segment structure, polarity, thermal properties, microphase separation

中图分类号:

杨浩, 田千俊, 石磊, 王淋, 黄志超, 戚栋明. 软段结构对无溶剂聚氨酯树脂微相分离的影响[J]. 现代纺织技术, 2022, 30(5): 74-81.

YANG Hao, TIAN Qianjun, SHI Lei, WANG Lin, HUANG Zhichao, QI Dongming. The effects of soft segments on microphase separation of solvent-free polyurethane resin[J]. Advanced Textile Technology, 2022, 30(5): 74-81.

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软段结构对无溶剂聚氨酯树脂微相分离的影响

The effects of soft segments on microphase separation of solvent-free polyurethane resin

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