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    彭星, 王瑜, 陈慧, 应杰, 汪济奎. 有机化高岭土/聚异丁烯热熔压敏胶的制备及性能[J]. 功能高分子学报, 2019, 32(3): 322-328. doi: 10.14133/j.cnki.1008-9357.20180328003
    引用本文: 彭星, 王瑜, 陈慧, 应杰, 汪济奎. 有机化高岭土/聚异丁烯热熔压敏胶的制备及性能[J]. 功能高分子学报, 2019, 32(3): 322-328. doi: 10.14133/j.cnki.1008-9357.20180328003
    PENG Xing, WANG Yu, CHEN Hui, YING Jie, WANG Ji-kui. Preparation and Properties of Organic Kaolin/Polyisobutene Hot Melt Pressure-Sensitive Adhesive[J]. Journal of Functional Polymers, 2019, 32(3): 322-328. doi: 10.14133/j.cnki.1008-9357.20180328003
    Citation: PENG Xing, WANG Yu, CHEN Hui, YING Jie, WANG Ji-kui. Preparation and Properties of Organic Kaolin/Polyisobutene Hot Melt Pressure-Sensitive Adhesive[J]. Journal of Functional Polymers, 2019, 32(3): 322-328. doi: 10.14133/j.cnki.1008-9357.20180328003

    有机化高岭土/聚异丁烯热熔压敏胶的制备及性能

    Preparation and Properties of Organic Kaolin/Polyisobutene Hot Melt Pressure-Sensitive Adhesive

    • 摘要: 将聚二甲基硅氧烷(PDMS)接枝到高岭土(Kaolin)表面,然后利用二甲基亚砜(DMSO)插入接枝高岭土片层间,制备了聚二甲基硅氧烷接枝插层型高岭土(PDMS-Kaolin)。通过红外光谱、X射线衍射分析、表面水接触角测试及热重分析表征了高岭土的有机化改性效果。以PDMS-Kaolin为填料与聚异丁烯(PIB)经转矩流变仪制得PDMS-Kaolin/PIB热熔压敏胶,并探究了PDMS-Kaolin的质量分数对热熔压敏胶结构稳定性、黏接性能和热性能的影响。结果表明:与纯PIB热熔压敏胶相比,PDMS-Kaolin/PIB热熔压敏胶中当PDMS-Kaolin的质量分数大于0.5%时,其结构稳定性、180°剥离强度和热性能都得到提升,其中剥离强度在PDMS-Kaolin的质量分数为1%时达到最大值0.659 N/mm,较纯PIB热熔压敏胶提高了11%,继续增大PDMS-Kaolin的质量分数,剥离强度会出现急剧下降,当增至2%时,剥离强度降至最低而体系的热性能达到最佳。

       

      Abstract: As a kind of base polymer, polyisobutene (PIB) has many merits such as excellent oxidation resistance, good chemical stability and very low moisture permeability. However, the PIB system is easy to creep, which limits its application in hot melt pressure-sensitive adhesives (HMPSAs). In this study, the structure stability, adhesion property and thermal performance of PIB HMPSA were successfully improved by introducing organic modified Kaolin. Polydimethylsiloxane (PDMS)-Kaolin was obtained by grafting PDMS onto the surface of Kaolin and using dimethyl sulfoxide (DMSO) for intercalating into the layers of grafted Kaolin. The effect of organic modification process was characterized by Fourier Transform Infrared Spectroscopy (FT-IR), X-ray diffraction (XRD), water contact angle and Thermogravimetry (TG). The results of FT-IR and TG manifested that PDMS molecular chains were grafted onto the surface of Kaolin. The XRD result showed that the interlayer spacing of Kaolin was expanded from 0.7 nm to 1.1 nm, indicating DMSO molecular chains were intercalated into the galleries of Kaolin and hydrogen bonds between the layers of Kaolin were broken. After the modification process, the water contact angle of Kaolin was increased from 10° to 114°, demonstrating that the hydrophobicity of Kaolin was increased significantly. PDMS-Kaolin/PIB HMPSAs were prepared by incorporating PDMS-Kaolin into PIB matrix using torque rheometer. The influences of PDMS-Kaolin mass fraction on properties of PIB HMPSA were investigated. Results showed that the structure stability, adhesion performance and thermal property of PIB HMPSA could be enhanced when the mass fraction of PDMS-Kaolin was above 0.5%; adhesion performance reached maximum when the mass fraction of PDMS-kaolin was 1% (the peak value of 180° peel strength was 0.659 N/mm), which was 11% higher than that of pure PIB HMPSA. The peel strength of PDMS-Kaolin/PIB HMPSAs would decline sharply, when the mass fraction of PDMS-kaolin was 2%, meanwhile the peel strength declined to the minimum and the thermal stability achieved maximum.

       

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