增韧透明聚苯乙烯的制备及热性能

增韧透明聚苯乙烯的制备及热性能孟程程,李新法*,陈金周,牛明军(郑州大学材料科学与工程学院,河南郑州 450052) 摘要:以丙烯酸丁酯为增韧单体,采用乳液聚合方法,制备了高韧性透明聚苯乙烯(THIPS)。利用差示扫描量热仪(DSC)和热重分析仪(TG)测试了 THIPS 的热性能。实验结果表明,聚苯乙烯分子链中引入丙烯酸丁酯后,使共聚物分子链的柔顺性提高,玻璃化转变温度 Tg 降低,其冲击强度提高;另外其热分解温度均在 400℃以上,说明其具有较好的热稳定性。关键词:高韧性透明聚苯乙烯;丙烯酸丁酯;乳液聚合;热性能The Preparation and ThermalProperties ofTransparentH igh ImpactPolystyreneMENG Cheng-cheng, LIXin-fa, CHEN Jin-zhou, NIUMing-jun(School ofMaterials Science and Engineering, ZhengzhouUniversity, Zhengzhou 450052, China)Abstract:Choosing butyl acrylate as a tougheningmonomer, proceeding copolymerization with styreneby emulsion polymerization, transparent high impact polystyrene (THIPS) was developed. The thermaproperties ofTHIPSwere studied bymeans of different scanning calorimeter (DSC), and thermogravimetricanalysis (TG). The experiment results showed that the higherofbutyl acrylate contentwhichwas introducedinto the molecular chain of polystyrene, the better the copolymer molecular chain s flexibility. The glasstransparent temperatureTgdecreased, while the impact strength increased. In addition, the copolymer hadbetter thermal stability because the thermal decomposition temperature of copolymerwas all above 400℃Keywords:Transparent High Impact Polystyrene; Butyl Acrylate; Emulsion Polymerization;ThermalProperties 由于聚苯乙烯(PS)具有刚性高、透明性好、耐水和耐化学品优异、电绝缘性和成型加工性良好、成本低廉等特点,因而在国民经济的许多领域获得了广泛应用[1]。但由于 PS 尚存在着冲击强度较低,脆性较大等缺陷而限制了其在许多方面的应用。为此,高韧性 PS 早已研制成功并投入应用,但其透明性却往往明显降低。作者以丙烯酸丁酯等为增韧单体,与苯乙烯进行了乳液共聚合[2],成功研制了高韧性透明聚苯乙烯(THIPS),其兼顾了透明性...