将少量超高分子量聚乙烯(UHMWPE)引入高密度聚乙烯(HDPE)构成共混体系,考察了共混物的动态流变行为随组成、温度、频率的变化规律.研究结果表明,体系储能模量、损耗模量、复数黏度随UHMPWE含量增加而增大;Han曲线斜率均小于2且不存在温度依赖性;Cole-Cole曲线均呈半弧形未表现出相分离特征,说明共混体系在熔体状态下并未发生分相过程;所有试样的时温叠加(TTS)主曲线在低频区并未出现特殊的粘弹松弛行为,而在高频区随着UHMWPE含量增加,时温叠加原理失效现象更加显著.
参考文献
| [1] | Lim KLK;Ishak ZAM;Ishiaku US;Fuad AMY;Yusof AH;Czigany T;Pukanszky B;Ogunniyi DS .High-density polyethylene/ultrahigh-molecular-weight polyethylene blend. I. The processing, thermal, and mechanical properties[J].Journal of Applied Polymer Science,2005(1):413-425. |
| [2] | Aguilar M;Martin S;Vega JF;Munoz-Escalona A;Martinez-Salazar J .Processability of a metallocene-catalyzed linear PE improved by blending with a small amount of UHMWPE[J].Journal of Polymer Science, Part B. Polymer Physics,2005(21):2963-2971. |
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