Janus粒子增强PP/PMMA共混聚合物材料的力学和热稳定性能的研究  

Study on Mechanical Properties and Thermal Stability of Janus Nanoparticles Reinforced PP/PMMA Polymer Blends

作　　者：张龙[1,2] 姚旭文 车春霞 秦智 李国洲[1,2] 韩迎红 杨博 ZHANG Long;YAO Xuwen;CHE Chunxia;QIN Zhi;LI Guozhou;HAN Yinghong;YANG Bo(School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Reuse of Non-Ferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;Lanzhou Chemical Research Center,PetroChina Research Institute of Petrochemical Engineering,Lanzhou 730060,China)

机构地区：[1]兰州理工大学材料科学与工程学院,兰州730050 [2]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州730050 [3]中国石油石油化工研究院兰州化工研究中心,兰州730060

出　　处：《材料导报》2025年第9期242-249,共8页Materials Reports

基　　金：国家自然科学基金(22066015);甘肃省重大科技专项(22ZD6GA008)。

摘　　要：聚丙烯(PP)/聚甲基丙烯酸甲酯(PMMA)复合材料具有良好的力学性能和耐热性,但PP与PMMA相容性较差,导致材料力学性能和热稳定性受限。本工作采用乳液聚合法制备了尺寸约118 nm的聚苯乙烯共聚甲基丙烯酸甲酯/聚苯乙烯(P(St-co-MMA)/PS)Janus不对称乳胶纳米粒子(P(St-co-MMA)Janus NPs),将其以不同比例添加到PP/10%PMMA和PP/30%PMMA体系中,经熔融共混、注塑成型技术得到PP/PMMA/P-(St-co-MMA)Janus NPs复合材料,并进行了相关表征分析。结果表明,引入的P(St-co-MMA)Janus NPs分散在PP/PMMA复合材料中的两相界面处,其可显著改善复合材料的力学性能和热稳定性能。PP/10%PMMA/0.9%P(St-co-MMA)Janus NPs相比PP/10%PMMA,冲击强度和拉伸强度分别提高15.53%和14.03%;PP/30%PMMA/0.9%P(St-co-MMA)Janus NPs相比PP/30%PMMA,冲击强度和拉伸强度分别提高37.09%和32.35%,且热失重5%和50%对应的温度(T_(5)和T_(50))分别升高39.51%和33.37%。P(St-co-MMA)Janus纳米粒子对PP/PMMA复合材料的增强作用归因于其能够阻碍相分离、增强界面结合等。Polypropylene/poly(methyl methacrylate)(PP/PMMA)composites have good mechanical properties and heat resistance,but poor compatibility between PP and PMMA results in limited mechanical properties and thermal stability.In this study,via emulsion polymerization,the poly(styrene-co-methyl methacrylate)/polystyrene(P(St-co-MMA)/PS)Janus asymmetric latex nanoparticles(P(St-co-MMA)Janus NPs)with a size of about 118 nm were prepared,which were then introduced with different ratios into PP/10wt%PMMA and PP/30wt%PMMA systems to fabricate PP/PMMA/P(St-co-MMA)Janus NPs polymer blends using the techniques of melt blending and injection molding.Relevant analytical characterization was carried out,which indicated the dispersion of Janus nanoparticles introduced at the PP-PMMA interface,and as a consequence,the significant improvement in mechanical properties and thermal stability of the composites.There had been found,15.53%and 14.03%increments for PP/10wt%PMMA/0.9wt%P(St-co-MMA)Janus NPs composite and 37.09%and 32.35%ones for PP/30wt%PMMA/0.9wt%P(St-co-MMA)Janus NPs composite in impact and tensile strengths,respectively,as well as 39.51%and 33.37%rises at T_(5) and T_(50)(temperatures at 5%and 50%thermogravimetric weight losses)in PP/30wt%PMMA/0.9wt%P(St-co-MMA)Janus NPs composite,respectively,compared to their corresponding PP/PMMA analogues without Janus nanoparticles(PP/10wt%PMMA and PP/30wt%PMMA).The enhancement of P(St-co-MMA)Janus nanoparticles to mechanical properties and thermal stability of PP/PMMA polymer blends can be attributed to their capability of blocking phase separation and strengthening interfacial bonding.

关 键 词：Janus纳米粒子 聚合物共混 增容剂 相界面 

分 类 号：TB332[一般工业技术—材料科学与工程]