摘要
TPO材料耐候耐腐蚀、柔韧环保,广泛应用于建筑防水领域,但其非极性导致的表面惰性和粘接性差,严重阻碍了其应用范围。针对此问题,采用化学接枝制备马来酸酐接枝TPO母料(TPO-g-MAH),并将其与TPO共混为改性TPO材料(TM-TPO)。研究结果表明:采用熔融挤出法可将MAH接枝到TPO大分子链上,TPO-g-MAH的添加可有效提升TM-TPO的粘接等综合性能。其中,当母料添加量为15%时,TM-TPO的静态接触角为87°,与纯TPO相比下降了76%;TM-TPO的本体强度为10.0MPa,比改性前提升了122%;TM-TPO与商用胶黏剂的粘接强度达6.5MPa,相比纯TPO提升了276%。这归因于极性接枝分子的引入,增大自身内聚强度及分子间相互作用力的同时,有效提升了粘接强度。研究成果为TPO材料的增粘难题提供了一种低成本、高效率改性策略。
TPO materials exhibit excellent weather resistance,acid and alkali resistance,flexibility and environmental friendliness,making them widely applicable in building waterproofing.However,their non-polar nature results in surface inertness and poor bonding performance,severely limiting their application scope.To address this issue,this study employed a chemical grafting method to prepare maleic anhydride-grafted TPO masterbatch(TPO-g-MAH),which was then blended with TPO to produce a modified TPO material(TM-TPO).The results demonstrate that MAH was successfully grafted onto the TPO macromolecular chains via melt extrusion.The addition of TPO-g-MAH masterbatch significantly improved the adhesion and overall performance of TM-TPO.At a masterbatch loading of 15%,TM-TPO exhibited a static contact angle of 87°,representing a 76%reduction compared to pristine TPO.Its bulk strength reached 10.0 MPa,marking a 122%increase over the unmodified material.Furthermore,the bonding strength between TM-TPO and commercial adhesive achieved 6.5 MPa,a 276%improvement relative to pure TPO.This improvement can be attributed to the introduction of polar grafted molecules,which not only enhanced the cohesive strength and intermolecular interactions of the material but also significantly boosted adhesion strength.The study provides a low-cost and efficient modification strategy to address the adhesion challenges of TPO materials.
作者
黄海亮
王鹏
任桉毅
王纲
Huang Hailiang;Wang Peng;Ren Anyi;Wang Gang(Keshun Waterpro of Technology Co.,Ltd.,Guangdong,528300;School of Chemistry,Xi'an Jiaotong University,Shaanxi,710049)
出处
《当代化工研究》
2025年第12期44-47,共4页
Modern Chemical Research
基金
2022年广东省佛山市顺德区核心技术攻关项目“新型内增塑TPO预铺反粘防水卷材的研发及产业化”(项目编号:2230218004250)。
关键词
TPO
化学接枝
粘接强度
建筑防水
TPO
chemical grafting
adhesive strength
building waterproofing
