PCPBT合金材料汽车门把手异常变黄现象的改进.pdf

第43卷,第4期
46
工程塑料应用
Vol43. No, 4
2015年4月
ENGINEERNG PLASTICS APPLICATION
Apr. 201
doi:10.3969/iSSn.1001-3539.2015.04.010
PC/PBT合金材料汽车门把手异常变黄现象的改进
别明智',陈健1,张震2,刘小林,叶淑英1,肖利群
(1.中煤科工集团重庆研究院有限公词,重庆400037;2.中国石油克拉玛依石化公司,新疆克拉玛依834003
摘要:针对自制聚碳酸酯(PC)/聚对苯二甲酸丁二酯(PBT)合金材料在注塑成型汽车门把手过程中的异常变
黄现象原因进行分析。对操作人员、注塑成型设备、加エエ艺及材料配方等影响因素进行了分析。对配方中的PC
PBT分别进行250~300C程序升温注塑实验无变黄现象,抗氧剂、硅油助剂分别进行热失重实验也没有发生明显失
重现象。PC/PBT合金材料在料筒中熔胶后立即注塑成型时,随着PBT含量的增加,PC/PBT合金材料变黄现象越
明显;相同PBT含量下,在料筒中停留时间越长变黄现象越明显。实验结果表明、PC,PBT嫁融混合加工过程中发
生酯交换反应到起PC/PBT合金材料变黄现象。通过在合金材料配方中添加磷酸二氩钠作为酯交换抑制剂,有效
降低了门把手的变黄现象。
关键词:PC/PBT合金材料;变黄现象;改进
中图分类号:TQ320.63文献标识码:A文章编号:1001-3539(2015)04-0046-04
Abnormal Yellowing Phenomena Improvement of Automobile Door Handle Made
by PC/PBT Alloy Material
Bie Mingzhi, Chen Jian,Zhang Zhen, Liu Xiaolin, Ye Shuying Xiao Liqun
(1. China Coal Technology Engineering Group Chongqing Research Institute, Chongqing 400037, China
2. Karamay Petrochemical Company. CNPC, Karamay 834003, China)
Abstract The causes of abnormal yellowing phenomena of self-made polycarbonate(PC)/ poly(butylene terephthalate(PBT)
alloy material in the process of injection molding of automobile door handle was studied. The effects of many factors on it were
discussed such as operating personnal, formulation of injection molding equipment, processing technology and material. Firstly
there was no yellowing phenomenon when programmed injection test of PC and PBT resin used in the alloy at 250-300 C was
conducted. Secondly, the weightlessness in the thermogravimetric experiments of additives of antioxidant and silicone oil additives
weren t observed. Then it was more obvious for the yellowing phenomenon during the injection molding with the increased conten
of PBT resin. The longer the alloy stayed in the barrel of injector, the more serious of the yellowing phenomenon with the same
content of PBT resin. In conclusion, the transesterification of PC and PBT during their melting processing causes the yellowing
phenomenon of PC/ PBT alloy material. The yellowing phenomenon of PC/ PBT alloy material can be reduced effectively b
adding sodium dihydrogen phosphate from its restrainment of transesterification
Keywords: polycarbonate/ poly(butylene terephthalate alloy material; yellowing phenomena improvement
聚磯酸酯(PC)/聚对苯二甲酸丁二酯(PBT)(10min),韩国三星第一毛织株式会社;
(PC/PBT)合金材料广泛应用于汽车的门把手、空
PBT树脂:GX121,中国石化仪征化纤股份有
调部件、车大灯灯具等部位,具有很好的耐高温性、限公司
喷涂性。笔者所在公司使用自制的PC/PBT合金
抗氧剂:1010,德国巴斯夫股份有限公司
材料用于制备某家用轿车外开门把手,把手在高温
1000号甲基硅油:长城工业润滑油有限公司
注塑成型加工中出现了异常变黄情况,从而影响后1.2主要仪器与设备
续的喷涂外观。笔者对PC/PBT合金材料变黄的
注塑机:SZ-140型,「广东东华机械有限公司;
原因进行了分析,找出了解决问题的办法。
热重(TG)分析仪:Q50型,美国TA仪器有限
1实验部分
公司。
1.1主要原材料
联系人:别明智,工程师,从事改性工程塑料及制品工作
PC树脂:SC-1220R,嫆体流动速率22g/
收稿日期:2015-01-27