Application of rosin tackifying resins in PBAT⁃based degradable hot⁃melt pressure⁃sensitive adhesives

doi:10.19491/j.issn.1001-9278.2025.12.018

Abstract

Abstract:

This study developed a series of biodegradable hot⁃melt pressure⁃sensitive adhesives based on polybutylene adipate terephthalate （PBAT）. The molecular weight of industrial PBAT resin was first modulated under controlled conditions. Subsequently， various rosin⁃derived tackifying resins were incorporated to formulate the adhesives. The performance of these PBAT⁃based hot⁃melt pressure⁃sensitive adhesives was evaluated through high⁃temperature rheology and 180° peel strength tests from steel plates. Results indicated that the adhesive formulated with disproportionated rosin exhibited superior properties， achieving peel strength of 5.39 N/25 mm and demonstrating excellent wetting ability on the substrate. Rheological analysis revealed a high modulus， and the viscoelastic profile confirmed that the material's performance aligns with that of a permanent pressure⁃sensitive adhesive. These findings highlight the effectiveness of disproportionated rosin as a tackifier for creating viable， biodegradable hot⁃melt pressure⁃sensitive adhesives from PBAT.

Key words: hot?melt pressure sensitive adhesive, polybutylene adipate terephthalate, tackifying resin, peel performanc

CLC Number:

TQ321

HUANG Huimin, XU Ruijie, LEI Caihong. Application of rosin tackifying resins in PBAT⁃based degradable hot⁃melt pressure⁃sensitive adhesives[J]. China Plastics, 2025, 39(12): 114-118.

Figures/Tables 10

Fig.1. Schematic diagram of DHAA and KS2100

Fig.2. Schematic diagram of 180 ° peel strength test

老化天数/天	M_n/g·mol^-1	M_w/g·mol^-1	PDI
0	30 054	459 408	15.3
3	23 664	230 114	9.7
6	13 299	28 246	2.1
9	8 937	16 545	1.9
12	6 190	10 503	1.7

Tab.1. Molecular weight and distribution of PBAT resin after different degradation days

Fig.3. Variation curves of PBAT complex viscosity with shear strain and angular frequency after different days of aging

Fig.4. DMA and DSC heating curves of PBAT resins after different days of aging

Fig.5. The 180 ° peel strength of pressure⁃sensitive adhesives prepared by different rosin tackifying resins and the residual glue of steel plates before and after peeling

样品	θ_W/°	θ_D/°	γ_s^d/mN·m^-1	γ_s^p/mN·m^-1	γ_s/mN·m^-1
1	64.97	29.04	37.56	10.54	48.10
S1	52.30	20.34	37.88	17.56	55.44
S2	79.06	9.01	47.79	2.39	50.18
2	54.06	38.87	30.35	20.13	50.48

Tab.2. Contact angles and surface tension of PET corona film， pressure⁃sensitive adhesive， and peeled steel sheet

样品	γ_1⁃s/mN·m^-1	γ_s-2/mN·m^-1
S1	0.89	0.50
S2	3.51	10.62

Tab.3. Interfacial tension of pressure⁃sensitive adhesive prepared by different rosin tackifiers， PET corona film and peeled steel plate

Fig.6. Viscous and elastic modulus versus frequency curves of pressure⁃sensitive adhesive prepared by different rosin tackifiers at 130 °C

Fig.7. Viscoelastic window of pressure⁃ sensitive adhesive prepared by different rosin tackifying resins at 130 ℃

References 19

[1]	刘彤，张军营，马解放，等.热熔压敏胶研究进展［J］.中国胶黏剂，2024，33（9）：1⁃8.
[2]	祝一帆.丙烯酸酯热熔压敏胶的制备及性能研究［J］.中国胶黏剂，2020，29（9）：8⁃11.
[3]	Zhao Z， Liu P， Zhang C， et al. Hot⁃melt pressure⁃sensitive adhesives based on SIS⁃g⁃PB copolymer for transdermal delivery of hydrophilic drugs［J］. International Journal of Adhesion and Adhesives， 2019， 91： 72⁃76.
[4]	邢立江，张书会.SIS热熔压敏胶的制备［J］.化学与生物工程，2020，37（12）：59⁃62.
[5]	Jian J， Xiangbin Z， Xianbo H. An overview on synthesis， properties and applications of poly （butylene⁃adipate⁃co⁃terephthalate）–PBAT［J］. Advanced Industrial and Engineering Polymer Research， 2020， 3（1）： 19⁃26.
[6]	皮俊轲，范鑫，赵辉，等.丙烯酸酯嵌段共聚物胶乳赋能高端压敏胶“油改水”［J］.中国胶黏剂，2024，33（06）：41⁃48+60.
[7]	Kugler S， Ossowicz P， Malarczyk⁃Matusiak K， et al. Advances in rosin⁃based chemicals： the latest recipes， applications and future trends［J］. Molecules， 2019， 24（9）： 1 651.
[8]	王丹，霍莉，闰明涛，等.松香基环氧树脂/马来海松酸酐固化反应动力学与热稳定性研究［J］.中国塑料，2015，29（05）：41⁃46.DOI：10.19491/j.issn.1001-9278.2015.05.008 .
[9]	Cho J H， Ryu K H， Kim H J. Adhesive Properties of Eco‐Friendly Hot Melt Adhesive Based on Poly （butylene adipate‐co‐terephthalate） and Rosin Maleic Resin［J］. Macromolecular Materials and Engineering， 2024： 2400103.
[10]	Deshoulles Q， Le Gall M， Benali S， et al. Hydrolytic degradation of biodegradable poly （butylene adipate⁃co⁃terephthalate）（PBAT）⁃Towards an understanding of microplastics fragmentation. Polymer Degradation and Stability， 2022， 205： 110122.
[11]	Cui C， Liu B， Wu T， et al. A hyperbranched polymer elastomer⁃based pressure sensitive adhesive［J］. Journal of Materials Chemistry A， 2022， 10（3）： 1 257⁃1 269.
[12]	Makkonen L. Young’s equation revisited［J］. Journal of Physics： Condensed Matter， 2016， 28（13）： 135001.
[13]	Fowkes F M. Attractive forces at interfaces［J］. Industrial & Engineering Chemistry， 1964， 56（12）： 40⁃52.
[14]	Fowkes F M. Determination of interfacial tensions， contact angles， and dispersion forces in surfaces by assuming additivity of intermolecular interactions in surfaces［J］. The Journal of Physical Chemistry， 1962， 66（2）： 382⁃382.
[15]	Owens D K， Wendt R C. Estimation of the surface free energy of polymers［J］. Journal of applied polymer science， 1969， 13（8）： 1 741⁃1 747.
[16]	Szalóki M， Szabó Z， Martos R， et al. The Surface Free Energy of Resin⁃Based Composite in Context of Wetting Ability of Dental Adhesives［J］. Applied Sciences， 2023， 13（21）： 12061.
[17]	Park H W， Park J W， Lee J H， et al. Property modification of a silicone acrylic pressure⁃sensitive adhesive with oligomeric silicone urethane methacrylate［J］. European Polymer Journal， 2019， 112： 320⁃327.
[18]	Sotoodeh‐Nia Z， Hohmann A， Buss A， et al. Rheological and physical characterization of pressure sensitive adhesives from bio‐derived block copolymers［J］. Journal of Applied Polymer Science， 2018， 135（34）： 46618.
[19]	Li P R， Chen Y H， Rwei S P. Effect of side group and crosslinking on the copolyesters as solvent⁃free pressure⁃sensitive adhesives［J］. International Journal of Adhesion and Adhesives， 2023， 127： 103494.