液体聚异戊二烯橡胶动态流变性能的研究

杜明亮,贾志欣,郭宝春,贾德民
(华南理工大学 材料科学与工程学院,广东 广州510640)

摘要:采用动态流变仪研究液体聚异戊二烯橡胶(LIR)的动态流变性能。频率扫描证明,LIR的粘度对剪切频率的敏感性很弱,只有在剪切频率较高时粘度才会发生变化;温度扫描证明,LIR的流变行为对温度非常敏感,而且在较高温度(130 ℃左右)下,LIR开始出现轻微的交联,导致粘度显著升高;Arrhenius方程可以描述LIR粘度与温度的关系,利用不同温度下的零切粘度计算得到的LIR流动活化能为39.27 kJ·mol-1。
关键词:液体聚异戊二烯;动态流变行为;流动活化能

中图分类号:TQ333.99文献标识码: A文章编号:1000890X(2006)07038904
作者简介:杜明亮(1975),男,山东潍坊人,华南理工大学在读博士研究生,主要从事高性能橡塑材料的研究。


Dynamic rheological behavior of LIR

DU Mingliang,JIA Zhixin,GUO Baochun,JIA Demin
(South China University of Technology,Guangzhou510640,China)

Abstract:The dynamic rheological behavior of liquid IR (LIR) was investigated by dynamic rheometer.It was showed by shear rate scanning that the shear rate had little effect on the viscosity of LIR except for the high shear rate;it was showed by temperature scanning that the rheological behavior was very sensitive to the temperature,and LIR was slightly crosslinked at the higher temperature (above 130 ℃) to increase the viscosity remarkably;and the dependence of the LIRs viscosity on the temperature could be described by Arrhenius equation,and the flow activation energy of LIR calculated from the viscosities at the zero shear rate and different temperatures was 3927 kJ·mol-1.
Keywords:LIR;dynamic rheological behavior;flow activation energy

 

 

 

 

OMMT/NBR纳米复合材料结构与性能的研究

谭英杰1,梁玉蓉1,2,张立群2*
(1.中北大学分校 材料工程系,山西 太原030008;2.北京化工大学 教育部纳米材料重点实验室,北京100029)

摘要:采用熔体插层法制备有机蒙脱土(OMMT)/NBR纳米复合材料,并对其微观结构及性能进行研究。结果表明,采用熔体法制备的OMMT/NBR复合材料,NBR大分子链插入OMMT片层中,OMMT在NBR基体中呈纳米级分散;与未加OMMT的NBR硫化胶相比,OMMT/NBR纳米复合材料的物理性能明显改善,相同剪切变形下的OMMT/NBR纳米复合材料的储能剪切模量较大;随着OMMT用量的增大,OMMT/NBR纳米复合材料的物理性能提高。
关键词:有机蒙脱土;NBR;纳米复合材料;熔体插层法

中图分类号:TQ330.38+3;TQ333.7文献标识码:A文章编号:1000890X(2006)07039304
作者简介:谭英杰(1971),男,山东潍坊人,中北大学分校讲师,硕士,主要从事聚合物改性的研究。


Structure and properties of OMMT/NBR nanocomposites

TAN Yingjie1,LIANG Yurong1,2,ZHANG Liqun2
(1.The Branch of North China University of Science and Technology,Taiyuan030008,China;2.Beijing University of Chemical Technology,Beijing100029,China)

Abstract:The modified organic montmorillonite (OMMT)/NBR nanocomposites were prepared by melt intercalation and the microstructure and properties of nanocomposites were investigated.The results showed that the molecular chain of NBR was intercalated into the OMMT layers in the OMMT/NBR nanocomposites prepared by melt intercalation,and OMMT was dispersed in NBR matrix on nanoscale;the physical properties of OMMT/NBR nanocomposites improved significantly and the storage modulus was higher under the same shearing deformation when compared to those of NBR vulcanizate without OMMT;and the physical properties of OMMT/NBR composites improved as the addition level of OMMT increased.
Keywords:OMMT;NBR;nanocomposite;melt intercalation

 

 

 

 

阻燃EPDM/PP TPV的研究

赵杏梅,伍社毛,田明,田洪池,张立群*
(北京化工大学 北京市新型高分子材料制备与加工重点实验室,北京100029)

摘要:研究制备工艺和阻燃剂用量对EPDM/PP阻燃热塑性硫化胶(TPV)性能的影响。结果表明,采用十溴联苯醚(FR10)/三氧化二锑并用阻燃体系,阻燃剂在动态硫化前加入,EPDM/PP TPV的阻燃性能较好,但物理性能稍差,阻燃剂用量较大时,EPDM/PP TPV的阻燃性能较好,但拉伸强度减小;采用FR10/三氧化二锑/氢氧化镁并用阻燃体系,氢氧化镁在动态硫化前加入,EPDM/PP TPV的阻燃性能稍好,物理性能和挤出外观质量略差,氢氧化镁用量对EPDM/PP TPV的阻燃性能影响不大。采用FR10/三氧化二锑/氢氧化镁并用阻燃体系,氢氧化镁在动态硫化前加入,可制备低硬度阻燃低发烟EPDM/PP TPV。
关键词:热塑性硫化胶;EPDM;PP;阻燃;发烟性能

中图分类号:TQ334.9;TQ330.38+7;TQ333.4文献标识码:A文章编号:1000890X(2006)07039705
基金项目:北京市教委重点学科建设基金(SYS100100420)
作者简介:赵杏梅 (1979),女,山西运城人,北京化工大学在读硕士研究生,从事聚合物阻燃性能的研究。



Study on EPDM/PP TPV

ZHAO Xingmei,WU Shemao,TIAN Ming,TIAN Hongchi,ZHANG Liqun
(Beijing University of Chemical Technology,Beijing100029,China)

Abstract:The effects of the preparation and the addition level of flame retarder on the properties of flame retardant EPDM/PP TPV were investigated.The results showed that an EPDM/PP TPV with better flame retardance and somewhat poorer physical properties was obtained by using the blending flame retardant system of decabromodiphenyl oxide (FR10)/antimony trioxide (Sb2O3) adding the flame retarder before dynamic vulcanization,and an EPDM/NBR TPV with better flame retardance and lower tensile strength was obtained by adding high level of flame retarder;and an EPDM/PP TPV with a little better flame retardance and somewhat poorer physical properties and extrudate appearance was obtained by using the blending flame retardant system of FR10/Sb2O3/magnesium hydroxide [Mg(OH)2] and adding Mg(OH)2 before dynamic vulcanization,and the addition level of Mg(OH)2 had little effect on the flame retardance of EPDM/NBR TPV.A flame retardant EPDM/NBR TPV with low hardness and smoke emission was obtained by using blending flame retardant system of FR10/Sb2O3/Mg(OH)2 and adding Mg(OH)2 before dynamic vulcanization.
Keywords:TPV;EPDM;PP;flame retardance;smoke emission

 

 

 

 

 

共凝聚法PSBR改性PVC的研究

邬润德,童筱莉,黄国波
(浙江工业大学 化工材料学院,浙江 杭州310014)

摘要:试验研究包覆剂和超细碳酸钙对粉末丁苯橡胶(PSBR)粒径分布和PSBR/PVC共混物性能的影响。结果表明,以自制的Coron树脂[苯乙烯马来酸酐(MA)共聚物,简称SMA]作包覆剂时,PSBR的粒径较小,PSBR/PVC共混物的拉伸强度和缺口冲击强度较大;当超细碳酸钙/丁苯胶乳质量比为35/65时,包覆剂SMA的适宜用量为08份,MA/苯乙烯的适宜质量比为056/024;当包覆剂SMA用量为05份时,加分散剂CH1A的超细碳酸钙填充的PSBR粒径较小,对PVC的改性效果较好,超细碳酸钙的适宜用量为35~4份。
关键词:粉末丁苯橡胶;PVC;共凝聚法;包覆剂;超细碳酸钙;粒径分布;缺口冲击强度

中图分类号:TQ3314+1;TQ3253文献标识码:B文章编号:1000890X(2006)07040203
作者简介:邬润德(1945),男,浙江杭州人,浙江工业大学教授,从事高分子材料共混改性方面的研究。