摘要
对4种隐形矫治热压膜材料Biolon^(TM)、Erkodur^(TM)、Scheu^(TM)和DR Proform^(TM)的理化性能进行研究,为临床选用适宜的热压膜材料以及开发新型热压膜材料提供数据支撑。物理性能主要通过力学测试和差示扫描量热法(DSC),分别分析4种材料的应力应变曲线以及特定厚度(1.0mm)的应力松弛性能以及热性能;化学性能主要采用傅里叶变换红外光谱(FTIR)和紫外分光光度计,分别对4种材料的化学成分和光学性能进行研究分析。研究发现:4种材料在厚度小于1.0mm时,其力学性能表现为厚度越厚,材料的拉伸强度和弹性模量越大;且在预设5%位移量下,热压膜片的应力随时间衰减,且Scheu的应力松弛率最低;4种材料的主要成分是一种新型共聚酯-聚对苯二甲酸乙二醇酯-1,4-环己烷二甲醇酯(PETG),其DSC曲线均只有一个玻璃化转变平台,材料为无定型聚合物,且材料在可见光范围内(400～760nm)的透光率均在80%以上,材料透明性能优异,均可满足隐形正畸的要求。
This paper investigated the physical and chemical performances of four main invisible align thermoplastic materials,including Biolon^TM,Erkodur^TM,Scheu^TM and DR Proform^TM.The mechanical and thermal properties of these four materials were analyzed by mechanical measurements and differential scanning calorimetry,while their chemical compositions and optical properties were characterized by FTIR spectroscopy and ultraviolet-visible spectrophotometry.The results indicated that the thicker materials exhibited a higher elasticity modulus and tensile strength when the material thickness was lower than1.0mm.Furthermore,the stresses of four materials relaxed with time under a5%displacement,and the Scheu s stress relaxation ratio showed a lowest value.FTIR analysis confirmed that these four materials were composed of a novel copolyester based on PETG.DSC analysis identified that the four materials were amorphous polymers with a glass transition platform.The four materials exhibited the light transmittance above80%within a visible spectrum of400~760nm,indicating that these materials had excellent transparent performance for invisible orthodontics.
作者
李江洪
王影
曹瑞军
王晶
卢秉恒
LI Jianghong;WANG Ying;CAO Ruijun;WANG Jing;LU Bingheng(Xi'an National Institute of Additive Manufacturing Co, Ltd, Xi'an 710065, China;School of Mechanical Engineering, Xi'an Jiao tong University, Xi'an 710049, China;School of Chemical Engineering and Technology, Xi'an Jiaotong University,Xi'an 710049, China;School of Mechanical Engineering, Dongguan University of Technology, Dongguan 523808, China)
出处
《中国塑料》
CAS
CSCD
北大核心
2018年第12期56-60,117,共6页
China Plastics
基金
广州市科技计划项目(201804010273)
广东省质监局科技项目(2017PT05)
关键词
聚对苯二甲酸乙二醇酯1
4环己烷二甲醇酯
热压膜材料
力学性能
透光率
poly(ethylene terephthalate-co-1,4-cyclohexylenedimethylene terephthalate)
thermoplastic material
mechanical property
light transmittance
