文章信息/Info

Title:

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

文章編號(hào):

1674-3962(2020)05-0391-04

作者:

王書(shū)濤1; 牛磊2

（1. 蘭州工業(yè)研究院，甘肅 蘭州 730050）（2. 蘭州理工大學(xué)石油化工學(xué)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(guān)鍵詞:

聚對(duì)苯二甲酸丁二醇酯（PBT）; nano-Sb2O3; 力學(xué)性能; 斷口形貌; 軟團(tuán)聚

Keywords:

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

分類(lèi)號(hào):

TQ314.24+8; O614.53+1

DOI:

10.7502/j.issn.1674-3962.201911019

文獻(xiàn)標(biāo)志碼:

A

摘要:

聚對(duì)苯二甲酸丁二醇酯（PBT）材料由于具有耐高溫性能在工程領(lǐng)域中應(yīng)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(huì)使其力學(xué)性能受到影響。采用機(jī)械化學(xué)法制備了納米Sb2O3（nano-Sb2O3）顆粒，并采用KH550改性劑對(duì)其進(jìn)行改性處理，再通過(guò)熔融共混法制備了實(shí)驗(yàn)用nano-Sb2O3/BPS/PBT復(fù)合材料。通過(guò)拉伸和沖擊兩種測(cè)試手段對(duì)復(fù)合材料的力學(xué)性能進(jìn)行研究，并利用SEM分析其斷口形貌。研究結(jié)果表明：隨著nano-Sb2O3含量的增加，復(fù)合材料的拉伸強(qiáng)度和沖擊強(qiáng)度均呈現(xiàn)出先升高后降低的趨勢(shì)；當(dāng)nano-Sb2O3的質(zhì)量分?jǐn)?shù)為1.5%時(shí)，復(fù)合材料的力學(xué)性能最優(yōu)；當(dāng)nano-Sb2O3的質(zhì)量分?jǐn)?shù)超過(guò)1.5%時(shí)，復(fù)合材料中產(chǎn)生了軟團(tuán)聚現(xiàn)象，其力學(xué)性能明顯下降；通過(guò)SEM觀察到nano-Sb2O3/BPS/PBT復(fù)合材料的沖擊斷面處有大量銀紋生成，屈服現(xiàn)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.