CAJ | 학술논문

用丙烯酸丁酯与少量功能单体共聚,合成了分子链侧基带羟基的聚丙烯酸丁酯(PBA)乳液,然后与硅溶胶混合,用溶胶-凝胶法制备了PBA/SiO_2杂化材料弹性体;研究了SiO_2含量对杂化材料弹性体力学性能及透光率的影响,并用扫描电子显微镜、傅里叶变换红外光谱、差示扫描量热分析和动态力学性能分析对杂化材料弹性体的结构进行了表征.结果表明,PBA/SiO_2杂化材料热压后成为一种力学性能优良的具有一定透光率的弹性体.随着SiO_2含量的增加,杂化材料弹性体的力学性能提高,透光率和SiO_2粒子的粒径增加,PBA基体的玻璃化转变温度和损耗因子下降;PBA共聚物分子链侧基所带羟基与SiO_2粒子表面的硅醇基发生了缩合脱水反应,形成了Si-O-C共价键,使PBA基体与SiO_2粒子构成的界面结合紧密,从而赋予杂化材料弹性体以优良的性能.
용병희산정지여소량공능단체공취,합성료분자련측기대간기적취병희산정지(PBA)유액,연후여규용효혼합,용용효-응효법제비료PBA/SiO_2잡화재료탄성체;연구료SiO_2함량대잡화재료탄성체역학성능급투광솔적영향,병용소묘전자현미경、부리협변환홍외광보、차시소묘량열분석화동태역학성능분석대잡화재료탄성체적결구진행료표정.결과표명,PBA/SiO_2잡화재료열압후성위일충역학성능우량적구유일정투광솔적탄성체.수착SiO_2함량적증가,잡화재료탄성체적역학성능제고,투광솔화SiO_2입자적립경증가,PBA기체적파리화전변온도화손모인자하강;PBA공취물분자련측기소대간기여SiO_2입자표면적규순기발생료축합탈수반응,형성료Si-O-C공개건,사PBA기체여SiO_2입자구성적계면결합긴밀,종이부여잡화재료탄성체이우량적성능.
The poly(butyl acrylate)(PBA) latex containing hydroxyl on the side groups of backbone chain was synthesized by emulsion copolymerization with butyl acrylate and a small quantity of functional monomer, and the PBA/silica hybrid elastomers were prepared by sol-gel process with PBA latex and silica sol mixture system. The effects of silica amount on mechanical properties, transmittance of the hybrid materials were studied. The structure of the hybrid elastomers were characterized by scanning electron microscope, Fourier transform infrared spectroscopy,differential scanning calorimetry and dynamic mechanical behavior analysis. The results indicated that PBA/silica hybrid materials became elastomers with excellent mechanical properties and considerable transmittance after hot pressing. As silica contents increasing, the mechanical properties of the hybrid elastomers improved, and the transmittance and silica nanoparticle size increased, while the glass transition temperature and loss factor of PBA matrix decreased. The hydroxyl on the side groups of PBA copolymer chain and the silanol groups on the surface of silica nanoparticles reacted each other via dehydration condensation to form Si-O-C covalent bond, which improved the interfacial interaction between PBA and silica particles effectively, so that the hybrid elastomers were endowed with excellent properties.