摘要
通过熔融共混的方法制备了聚甲基丙烯酸甲酯(PMMA)/丙烯腈-苯乙烯-丙烯酸酯三元共聚物(ASA)合金。研究了ASA的熔体质量流动速率及其与PMMA的比例对合金力学性能、加工流动性的影响。结果表明:选用高熔体质量流动速率ASA的合金其拉伸强度和弯曲强度与选用低熔体质量流动速率ASA的合金相差不大,但冲击强度明显高于后者。DSC分析表明,低熔体质量流动速率的ASA在48.54℃出现一个玻璃化转变(Tg)平台,其对应于接枝有SAN的丙烯酸酯橡胶颗粒与SAN基体之间形成的界面相的Tg平台。SEM进一步表明,选用低熔体质量流动速率ASA的合金其冲击断面较光滑,呈现脆性断裂的特征。纳米氧化铝的添加提高了PMMA/ASA合金的耐摩擦磨损性能及表面硬度。
Polymethyl methacrylate（PMMA）/acrylonitrile-styrene-acrylate terpolymer（ASA）alloy was prepared via melt blending method.Effects of melt flow rate of ASA and the ratio of PMMA/ASA on mechanical property,processing mobility of PMMA/ASA alloy were studied.Results showed that when high melt flow rate ASA was selected,alloy′s tensile strength and flexural strength were little different from that of the low melt flow rate ASA,but the impact strength was significantly higher than the latter.DSC analysis showed that a glass transition（Tg）platform emerged in the low melt flow rate ASA at 48.54 ℃,which corresponded to the Tg platform of interface phase formed between SAN grafted acrylate rubber particles and SAN matrix.SEM further showed that when low melt flow rate ASA was select,alloy′s impact fracture was smooth which presented the characteristic of brittle fracture.The addition of nano-Al2O3 increased PMMA/ASA alloy′s abrasion resistant and surface hardness.
出处
《塑料工业》
CAS
CSCD
北大核心
2010年第10期28-31,共4页
China Plastics Industry
