高填充粉煤灰PVC复合发泡板材的制备及性能

发布时间：2018-12-18 01:55

【摘要】：以偶氮二甲酰胺(AC发泡剂)、Zn O和Na HCO3复合体系作为发泡剂,采用模压发泡的方法制备高填充粉煤灰聚氯乙烯(PVC)复合发泡板材,确定复合发泡剂的最优配比及其在复合发泡板材中的最佳用量,并对其性能进行了研究。采用发气量测定、热重/差示扫描量热(TG/DSC)分析对AC发泡剂进行了改性研究,选出分解温度满足加工条件的复合发泡剂。添加不同份数的复合发泡剂制备PVC复合发泡板材,用扫描电子显微镜(SEM)分析其断面,测试板材的冲击强度及弯曲强度。实验结果表明,当AC发泡剂、Zn O和Na HCO3的配比为2∶1∶1.5时,最大发气量为213 m L/g,分解温度区间为165~177℃,满足PVC发泡板材加工。当复合发泡剂添加量为6份时,力学性能达到最佳,弯曲强度为17.63 MPa,冲击强度为21.88 k J/m2,达到国家硬质聚氯乙烯低发泡板材的标准;粉煤灰填充量高达61.16%。
[Abstract]:The high filled fly ash polyvinyl chloride (PVC) composite foaming board was prepared by using AC foaming agent), Zn O and Na HCO3 as foaming agent. The optimum ratio of the compound foaming agent and its optimum dosage in the composite foamed sheet were determined and the properties of the compound foaming agent were studied. The modification of AC foaming agent was studied by gas quantity measurement and thermogravimetric / differential scanning calorimetry (TG/DSC) analysis. The composite foaming agent with decomposition temperature satisfying processing conditions was selected. The PVC composite foamed sheet was prepared by adding different amount of composite foaming agent. The section of the composite foamed plate was analyzed by scanning electron microscope (SEM), and the impact strength and bending strength of the sheet were tested. The experimental results show that when the ratio of AC foaming agent, Zn O and Na HCO3 is 2: 1: 1.5, the maximum gassing capacity is 213ml / g, and the decomposition temperature range is 165 ~ 177C, which satisfies the processing of PVC foamed sheet. When the content of compound foaming agent is 6 phr, the mechanical properties are the best, the flexural strength is 17.63 MPa, and the impact strength is 21.88kJ / m2, which is up to the national standard of rigid PVC low foaming board. The filling capacity of fly ash is as high as 61.16.
【作者单位】：中北大学理学院;
【基金】：国家自然科学基金重点项目(20871108,51272239) 山西省留学基金(2014-重点6)项目
【分类号】：TQ325.3;TB332

【相似文献】