摘要
对采用活性负离子聚合法制得的聚丁二烯(PB)/烯丙基异丁基多面体低聚倍半硅氧烷(A-POSS)纳米杂化材料进行硫化,采用X射线衍射仪、扫描电子显微镜、差示扫描量热法、热重分析、动态力学性能分析等手段,研究了A-POSS含量对硫化PB/A-POSS纳米杂化材料的微观形貌、耐热性能和动态力学性能的影响。结果表明,当A-POSS质量分数约高于2.00%时,A-POSS在基体中发生聚集,形成A-POSS结晶区;PB中引入少量A-POSS,可显著提高纳米杂化材料的玻璃化转变温度,耐热性能也得到明显提高,同时玻璃化转变区的储能模量明显升高,且随着A-POSS含量的增加而升高,而损耗因子则有所降低。
The polybutadiene（PB）/allyl isobutyl polyhedral oligomeric silsesquioxane（A-POSS） nanohybrids by the anionic polymerization method were vulcanized;the micro morphology,thermal and dynamic mechanical properties of PB/A-POSS nanohybrids were investigated by X-ray diffraction,scanning electronic microscopy,differential scanning calorimetry,thermal gravimetric analysis and dynamic mechanical properties analysis.The results showed that the aggregation of A-POSS in PB occurred obviously,forming crystalline domains when the mass fraction of A-POSS exceeded 2.00%.A small amount of A-POSS added in PB could raised the glass transition temperature of nanohybrids significantly and so did the thermal resistance.The storage modulus increased dramatically in glass transition region,and increased with the amount of A-POSS,but the loss factor decreased simutaneously.
出处
《合成橡胶工业》
CAS
CSCD
2011年第5期346-351,共6页
China Synthetic Rubber Industry
基金
国家自然科学基金资助项目(50773007)
中央高校基本科研业务费专项资金资助项目(2009QN049)
