高透明耐溶剂性聚碳酸酯合金材料的制备  

Preparation of Polycarbonate Alloy with High Transparency and Excellent Solvent Resistant

作　　者：李一搏 盖景刚[1] Yibo Li;Jinggang Gai(State Key Laboratory of Polymer Materials Engineering,Polymer Research Institute of Sichuan University,Chengdu 610065,China)

机构地区：[1]高分子材料工程国家重点实验室四川大学高分子研究所,四川成都610065

出　　处：《高分子材料科学与工程》2024年第6期33-38,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51473097)。

摘　　要：聚碳酸酯(PC)具有很多优异的性能,但其熔体黏度大、流动性差、共混合金透光率下降、在极性溶剂中易应力开裂,这些缺点大大限制了PC的应用,文中将聚对苯二甲酸乙二醇酯-1,4-环己烷二甲醇酯(PETG)与PC进行熔融共混,制备了PC/PETG合金,并研究了共混合金的微观结构、热性能、透光性、力学性能及耐溶剂性能等。结果表明,PC/PETG合金只有1个玻璃化转变温度(Tg),PC和PETG两组分之间无明显相界面,相容性良好,使得合金具有较好的透明性和拉伸强度,当PETG质量分数为10%,合金透光率高达85%,拉伸强度为58.31MPa,比纯PC提高了5.5%;尽管共混合金只有1个Tg值,但并未发生酯交换反应,这有利于合金保持各组分原有的性质,PETG可以有效促进PC分子链的解缠结,改善PC的熔体加工流动性,当PETG质量分数仅为10%时,流动性提高了约34.8%;而且无论在丙酮还是在二甲苯溶剂中,相对于纯PC,PC/PETG合金的溶剂开裂现象明显减弱。Polycarbonate(PC)has a lot of excellent properties,but its shortcomings of high melt viscosity,poor flow ability,low light transmission rate of blending alloy,susceptibility to stress cracking in polar solvents have greatly limited its application.In this paper,polyethylene terephthalate-1,4-cyclohexanediol ester(PETG)was melt blended with PC to prepare PC/PETG alloy,the micro-structure,thermal properties,light transmission rate,mechanical properties and solvent resistance of the blended alloys were studied.The results show that PC/PETG alloy has only one Tg,and there is no obvious phase interface between PC and PETG,which makes the alloy have good transparency and tensile strength.When the mass fraction of PETG is 10%,the alloy has good tensile strength.The light transmission rate of the alloy is as high as 85%,and the tensile strength is 58.31 MPa,5.5%higher than that of pure PC.Although the blending alloy has only one Tg,trans-ester reaction does not occur,which is conducive to maintaining the original properties of each component of the alloy.PETG can effectively promote the untangle of PC molecules and improve the melt processing fluidity of PC.When the PETG mass fraction is only 10%,the fluidity is improved by about 34.8%,and the solvent cracking phenomenon of PC/PETG alloy is significantly reduced compared to pure PC in both acetone and xylene solvents.

关 键 词：聚碳酸酯 聚对苯二甲酸乙二醇酯-1 4-环己烷二甲醇酯 共混合金 透明性 耐溶剂性 

分 类 号：TB332[一般工业技术—材料科学与工程]