CAJ | 학술논문

采用异步合成法，将经过预聚的聚甲基丙烯酸甲酯(PMMA)接枝到双酚A型氰酸酯树脂(BADCy)中制备BADCy/PMMA合金材料。对合金材料进行力学性能测试和动态热机械分析，研究了不同PMMA含量对合金材料弯曲、冲击性能及玻璃化转变温度(Tg)的影响。利用傅立叶变换红外光谱和扫描电子显微镜对其结构和形态进行了分析与表征。结果表明，PMMA接枝到了BADCy的分子链上，形成了半互穿网络结构；随PMMA含量的增加，合金材料的弯曲强度、弯曲弹性模量和冲击强度总体上呈先上升后降低的趋势，当PMMA质量分数为15%时，弯曲强度和弯曲弹性模量分别达到最大，其值为196.29 MPa和9.83 GPa，比纯BADCy提高了74.5%和92.0%；当PMMA质量分数为20%时，冲击强度达到最大值17.95 kJ/m2，比纯BADCy提高了88.3%，此时材料冲击断面呈现出典型的韧性断裂特征。与纯BACDy相比，合金材料的Tg略有降低。
채용이보합성법，장경과예취적취갑기병희산갑지(PMMA)접지도쌍분A형청산지수지(BADCy)중제비BADCy/PMMA합금재료。대합금재료진행역학성능측시화동태열궤계분석，연구료불동PMMA함량대합금재료만곡、충격성능급파리화전변온도(Tg)적영향。이용부립협변환홍외광보화소묘전자현미경대기결구화형태진행료분석여표정。결과표명，PMMA접지도료BADCy적분자련상，형성료반호천망락결구；수PMMA함량적증가，합금재료적만곡강도、만곡탄성모량화충격강도총체상정선상승후강저적추세，당PMMA질량분수위15%시，만곡강도화만곡탄성모량분별체도최대，기치위196.29 MPa화9.83 GPa，비순BADCy제고료74.5%화92.0%；당PMMA질량분수위20%시，충격강도체도최대치17.95 kJ/m2，비순BADCy제고료88.3%，차시재료충격단면정현출전형적인성단렬특정。여순BACDy상비，합금재료적Tg략유강저。
Through grafting pre-polymerized poly (methyl methacrylate) (PMMA) to bisphenol-A dicyanate resin (BADCy), BADCy/PMMA alloy materials were prepared by asynchronous synthesis method. The effects of PMMA content on the flexural strength,flexural modulus,impact strength and glass transition temperature (Tg) of the alloy materials were studied through mechanical properties tests and dynamic thermal mechanical analysis. The structure and morphology of the alloy materials were analyzed and characterized by FTIR and SEM. The results show that PMMA is grafted to the molecular chains of BADCy and they form a SIPNs. With PMMA content increasing,the flexural strength,flexural modulus,impact strength of the alloy materials increase firstly and decrease lastly in general. When the mass fraction of PMMA is 15%,the flexural strength and flexural modulus reach the maximal value which is 196.29 MPa and 9.83 GPa respectively and increases by 74.5%and 92.0%comparing with pure BADCy. When the mass fraction of PMMA is 20%,the impact strength reaches the maximal value which is 17.95 kJ/m2 and increases by 88.3%comparing with pure BACDy,the fracture surface of the alloy materials shows the feature of typical ductile fracture. Comparing with pure BADCy,Tg of the alloy materials reduced slightly.