Effect of Poly (Caprolactone) Introduction Site on the Network Structure and Properties of Glycidyl Azide Polymer Adhesive

Tu, Chengzhao; Wang, Zhengyuan; Zhu, Fengdan; Yang, Dengsheng; Liu, Chang; Bai, Chaofei; Li, Guoping; Luo, Yunjun

doi:10.3390/polym17050661

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Open AccessArticle

Effect of Poly (Caprolactone) Introduction Site on the Network Structure and Properties of Glycidyl Azide Polymer Adhesive

by

Chengzhao Tu

,

Zhengyuan Wang

,

Fengdan Zhu

,

Dengsheng Yang

,

Chang Liu

,

Chaofei Bai

,

Guoping Li

^* and

Yunjun Luo

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China

^*

Author to whom correspondence should be addressed.

Polymers 2025, 17(5), 661; https://doi.org/10.3390/polym17050661

Submission received: 19 January 2025 / Revised: 20 February 2025 / Accepted: 25 February 2025 / Published: 28 February 2025

(This article belongs to the Section Polymer Chemistry)

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Abstract

Copolymers of glycidyl azide polymer (GAP) and poly (caprolactone) (PCL) were obtained by introducing PCL molecular chains at both ends or side groups of GAP molecular chains, respectively. GAP/PCL elastomers were prepared via polyurethane curing reaction and compared with GAP/PCL elastomers prepared by physical blending, in order to clarify the relationship between microstructure and macroscopic properties. The results showed that no GAP and PCL phase separation was observed in the chemically bonded GAP/PCL elastomers. The elongation at break of the thermosetting GAP/PCL block copolymer elastomer increased significantly from 268% to 300% due to the increase in molecular weight between crosslinking points. The GAP/PCL graft copolymer, with its longer PCL segment length and higher segment mobility, formed microcrystalline domains within the elastomer, resulting in a significant improvement in tensile strength from 0.32 MPa to 1.07 MPa. In addition, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) revealed that the glass transition temperature of the GAP/PCL elastomer was 2.6 °C lower than that of the pure GAP elastomer, and the thermal stability was also enhanced.

Keywords: GAP; blending; crystallize; mechanical property; adhesive

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MDPI and ACS Style

Tu, C.; Wang, Z.; Zhu, F.; Yang, D.; Liu, C.; Bai, C.; Li, G.; Luo, Y. Effect of Poly (Caprolactone) Introduction Site on the Network Structure and Properties of Glycidyl Azide Polymer Adhesive. Polymers 2025, 17, 661. https://doi.org/10.3390/polym17050661

AMA Style

Tu C, Wang Z, Zhu F, Yang D, Liu C, Bai C, Li G, Luo Y. Effect of Poly (Caprolactone) Introduction Site on the Network Structure and Properties of Glycidyl Azide Polymer Adhesive. Polymers. 2025; 17(5):661. https://doi.org/10.3390/polym17050661

Chicago/Turabian Style

Tu, Chengzhao, Zhengyuan Wang, Fengdan Zhu, Dengsheng Yang, Chang Liu, Chaofei Bai, Guoping Li, and Yunjun Luo. 2025. "Effect of Poly (Caprolactone) Introduction Site on the Network Structure and Properties of Glycidyl Azide Polymer Adhesive" Polymers 17, no. 5: 661. https://doi.org/10.3390/polym17050661

APA Style

Tu, C., Wang, Z., Zhu, F., Yang, D., Liu, C., Bai, C., Li, G., & Luo, Y. (2025). Effect of Poly (Caprolactone) Introduction Site on the Network Structure and Properties of Glycidyl Azide Polymer Adhesive. Polymers, 17(5), 661. https://doi.org/10.3390/polym17050661

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Effect of Poly (Caprolactone) Introduction Site on the Network Structure and Properties of Glycidyl Azide Polymer Adhesive

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