文章信息/Info

Title:

Influence of Nano-Sb2O3 Particles on Mechanical Properties of PBT�睟ased Composites

文章編號:

1674-3962(2020)05-0391-04

作者:

王書濤1; 牛磊2

（1. 蘭州工業研究院，甘肅 蘭州 730050）（2. 蘭州理工大學石油化工學院，甘肅 蘭州 730050）

Author(s):

WANG Shutao1;  NIU Lei2

(1. Lanzhou Research Institute of Industry, Lanzhou 730050, China) (2. College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, China)

關鍵詞:

聚對苯二甲酸丁二醇酯（PBT）; nano-Sb2O3; 力學性能; 斷口形貌; 軟團聚

Keywords:

polybutylene terephthalate （PBT);  nano-Sb2O3;  mechanical property;  fracture morphology;  soft agglomeration

分類號:

TQ314.24+8; O614.53+1

DOI:

10.7502/j.issn.1674-3962.201911019

文獻標志碼:

A

摘要:

聚對苯二甲酸丁二醇酯（PBT）材料由于具有耐高溫性能在工程領域中應用較為廣泛，但需要添加阻燃劑以改善其易燃的缺陷，然而阻燃劑的添加會使其力學性能受到影響。采用機械化學法制備了納米Sb2O3（nano-Sb2O3）顆粒，并采用KH550改性劑對其進行改性處理，再通過熔融共混法制備了實驗用nano-Sb2O3/BPS/PBT復合材料。通過拉伸和沖擊兩種測試手段對復合材料的力學性能進行研究，并利用SEM分析其斷口形貌。研究結果表明：隨著nano-Sb2O3含量的增加，復合材料的拉伸強度和沖擊強度均呈現出先升高后降低的趨勢；當nano-Sb2O3的質量分數為1.5%時，復合材料的力學性能最優；當nano-Sb2O3的質量分數超過1.5%時，復合材料中產生了軟團聚現象，其力學性能明顯下降；通過SEM觀察到nano-Sb2O3/BPS/PBT復合材料的沖擊斷面處有大量銀紋生成，屈服現象明顯。

Abstract:

Polybutylene terephthalate (PBT) materials are widely used in the engineering field due to its high temperature resistance, but it is necessary to add flame retardants to reduce the flammability of PBT materials. However, flame retardants have a negative effect on the mechanical properties of PBT materials. In this study, nano-Sb2O3 particles were prepared by mechanochemical method, then modified by KH550. Nano-Sb2O3/BPS/PBT composites were prepared by melt blending method. The mechanical properties of nano-Sb2O3/BPS/PBT composites were studied by tensile test and impact test. The fracture morphologies of nano-Sb2O3/BPS/PBT composites were characterized by SEM. The results show that with the increase of nano-Sb2O3 content, the tensile strength and impact strength of composites increase firstly and then decrease. When the nano-Sb2O3 content is 1.5wt%, both tensile strength and impact strength of composites achieve the best values. When the nano-Sb2O3 content is more than 1.5wt%, the mechanical properties of composites decrease significantly due to the soft agglomeration of nano-Sb2O3 particles. Moreover，SEM image shows a lot of crazes form on the fracture surface of nano-Sb2O3/BPS/PBT composites, and there still exists obvious yield phenomenon.