PP/纳米竹炭粉复合材料的结构与性能分析

Investigation on Structure and Properties of PP/Nano-( Bamboo Charcoal) Composite

首先利用共混改性以及注塑成型的方法制备了聚丙烯(PP)与纳米竹炭粉(NBC)复合材料,然后利用XRD、DSC、SEM等手段系统分析了复合材料结构与性能的关系。结果表明:当NBC添加量超过9.0%时,两相相容性变差;复合材料的相对结晶度和熔点均随着NBC添加量的增加呈现先升高后降低的趋势;复合材料中PP主要以α-晶型存在,当纳米竹炭粉的含量较低(9.0%以内)时,诱导生长γ-晶型PP晶体;而当纳米竹炭粉含量较大(9.0%以上)时,诱导生长β-晶型;通过DSC与XRD分析可知,β-晶型与γ-晶型均易在升温过程中转变为α-晶型。

PP/nano-（ bamboo charcoal）（NBC） composite was prepared by using melt blending and injection molding at first,and then the relationship between properties and structure of composite was systematically researched by utilizing XRD, DSC and SEM. The results showed that, firstly,the composite had a poor compatibility when NBC was above 9.0%. Secondly, with increasing addition of NBC, the crystallinity and melting point of composite first increased and then decreased. Thirdly, composite had a variety of PP crystal types. As the content of NBC was lower than 9.0% ,there was the majority of α-form PP with a small amount of γ-form PP in composite. And as the addition was larger than 9.0% , β-form was auxiliary. Finally, based on DSC analysis,the β-form and γ-form PP crystal could transform to α-form during heating process.