粉状填充剂对橡胶复合材料拉断伸长率的影响

张琦1，吴友平2，刘力2，田明1，张立群1
（1.北京化工大学 教育部纳米材料重点实验室, 北京100029;2.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：以不同粒径的氢氧化镁、轻质碳酸钙和炭黑 N110填充SBR、EPDM、NBR和硅橡胶，探讨粉状填充剂（简称粉体）对其填充橡胶复合材料拉断伸长率的影响。结果表明，粉体的表面活性、粒径、分散性、用量以及基体橡胶的拉伸强度和拉断伸长率等因素对橡胶复合材料拉断伸长率的影响存在着竞争关系。粉体的粒径和基体橡胶的交联密度影响橡胶复合材料拉断伸长率随粉体用量增大而提高的幅度。 粉体对基体橡胶表现出较强的补强作用时，使橡胶复合材料的拉断伸长率出现峰值的粉体用量较小。与传统观点不同，试验得出大多数情况下填充粉体有利于橡胶复合材料拉断伸长率提高的结论。
关键词：粉状填充剂；SBR；EPDM；NBR；硅橡胶；拉断伸长率

中图分类号：TQ330.38；TQ333文献标识码： A 文章编号：1000890X(2005)09051706
基金项目：教育部博士点基金资助项目（20020010004）；出国留学人员回国启动基金资助项目（ZLX200306）
作者简介：张琦（1977），女，河南安国人，美国新泽西理工学院在读博士研究生，主要从事聚合物加工工程的研究。


Effects of powdered fillers on elongation at break of rubber composites

ZHANG Qi,WU Youping,LIU Li,TIAN Ming,ZHANG Liqun
(Beijing University of Chemical Technology,Beijing100029,China)

Abstract:The effects of the powdered fillers on the elongation at break of the rubber composites were investigated using SBR,EPDM,NBR and silicone rubber compounds filled with different levels of magnesium hydroxide,which had different particle sizes,light calcium carbonate and black N110 respectively.The results showed that there was a competitive relationship among the effects of the surface activity,particle size,dispersity and addition level of powdered fillers,as well as the tensile strength and elongation at break of rubber matrix on the elongation at break of rubber composites.The increase of the elongation at break of rubber composites with the addition level of powdered fillers was influenced by the particle size of powdered fillers and the crosslinking density of rubber matrix.If the powdered fillers gave the rubber matrix the stronger reinforcing effect,the addition level of powdered fillers with which the peak elongation at break of rubber composites occured was lower.In contrast with the traditional viewpoint,it was concluded from the test that the powdered fillers were beneficial to increase the elongation at break of rubber composites.
Keywords:powdered filler;SBR;EPDM;NBR;silicone rubber;elongation at break

　

　

　

PS/EPDM反应性共混物的研究

徐建平，承民联，李颖，王讯
（江苏工业学院 材料系，江苏 常州213016）



摘要：在熔融状态下，利用FriedelCrafts烷基化反应原位生成聚苯乙烯（PS）/EPDM共混物，考察路易斯酸品种、用量、混炼温度和混炼时间等对共混物性能的影响。结果表明，选择三氯化铝作为PS和EPDM大分子间形成接枝共聚物EPDMgPS的催化剂时效果较好；EPDMgPS的生成使PS/EPDM共混物的熔体质量流动速率和PS相的玻璃化温度下降，增大了PS和EPDM两相的界面结合力，从而提高了共混物的性能；当PS/EPDM共混比为60/40、三氯化铝用量为3份、混炼温度为140 ℃、混炼时间为5 min时，共混物综合性能较好。
关键词：聚苯乙烯；EPDM；三氯化铝；FriedelCrafts烷基化反应；接枝共聚

中图分类号：TQ325.1＋2；TQ333.4文献标识码： A文章编号：1000890X(2005)09052304
基金项目：江苏省自然科学基金资助项目（BK2003028）
作者简介：徐建平（1966），男，江苏靖江人，江苏工业学院副教授，硕士，主要从事聚合物改性及成型加工研究。



Study on reactive PS/EPDM blend

XU Jianping,CHENG Minlian,LI Ying,WANG Xun
(Jiangsu Polytechnic Institute,Changzhou213016,China)

Abstract:A polystyrene(PS)/EPDM blend formed in situ by FriedelCrafts alkylation in melt state was developed.The effects of the type and addition level of Lewis acid and the temperature and time of mixing on the properties of blend were investigated.The results showed that a better EPDMgPS was obtained by using aluminum trichloride as catalyst;the formation of EPDMgPS copolymer made the melt mass flow rate of PS/EPDM blend and the glass transition temperature of PS phase decrease,the bonding force on the interface between PS and EPDM increase,and thus the properties of blend improve;and a PS/EPDM blend with better comprehensive properties was obtained when PS(60)/EPDM(40),3 phr aluminum trichloride,140 ℃ mixing temperature and 5 min mixing time were used.
Keywords:polystyrene;EPDM;aluminum trichloride;FriedelCrafts alkylation;graft copolymerization




　



聚合转化率对高反式丁二烯异戊二烯共聚橡胶微观结构及性能的影响

彭杰，姚薇，杜凯，李旭东，赵永仙，黄宝琛
（青岛科技大学 橡塑材料与工程教育部重点实验室，山东 青岛266042）

摘要：研究在10 L聚合釜中由TiCl4/MgCl2负载型催化剂催化合成高反式丁二烯异戊二烯共聚橡胶时，聚合转化率对共聚物的组成、结构和性能的影响。结果表明，丁二烯/异戊二烯的初始摩尔比为02时，随着聚合转化率的升高，聚合物中丁二烯单元的平均组成下降；不同聚合转化率下共聚物丁二烯单元中反式1,4结构摩尔分数均大于098，异戊二烯单元中反式1,4结构摩尔分数均大于0.97，聚合转化率对共聚物的微观结构没有明显影响。聚合转化率提高使共聚物生胶拉伸强度提高，拉断伸长率和硬度变化不大;聚合转化率为60％的硫化胶具有良好的综合性能。
关键词：负载钛催化剂；丁二烯；异戊二烯；共聚合；聚合转化率

中图分类号：TQ333.99文献标识码： A文章编号：1000890X(2005)09052704
基金项目：国家自然科学基金资助项目（20174021）；青岛市科委科学基金资助项目（022kjyj30）
作者简介：彭杰（1977），男，山东烟台人，中国科学院北京化学研究所在读博士研究生，主要从事高分子材料的研究。



Effect of conversion rate on microstructure and properties of 
high transbutadieneisoprene copolymer rubber

PENG Jie,YAO Wei,DU Kai,LI Xudong,ZHAO Yongxian,HUANG Baochen
(Qingdao University of Science and Technology,Qingdao266042,China)

Abstract:The effect of the conversion rate on the composition,microstructure and properties of high transbutadieneisoprene copolymer rubber,which was synthesized in a 10 L autoclave using TiCl4/MgCl2 as supported catalyst,was investigated.It was found that when the initial mole ratio of butadiene/isoprene was 0.2,the average mole fraction of butadiene unit in copolymer decreased as the conversion rate increased;the conversion rate had little effect on the microstructure of copolymer,and the mole fraction of the trans1,4structure in butadiene unit was always greater than 0.98 and that in isoprene unit was always greater than 0.97 at different conversion rates;the greater conversion rate gave the improved tensile strength of raw copolymer,but similar elongation at break and hardness;and a vulcanizate with excellent comprehensive properties was obtained when the copolymer was synthesized at 60% conversion rate.
Keywords:supported TiCl4 catalyst;butadiene;isoprene;copolymerization;conversion rate






　

马来酸酐接枝橡胶离聚体改性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：试验研究以马来酸酐（MA）接枝BR部分替代NBR，通过离子交联提高BR/NBR/PVC共混物的相容性。正交试验结果表明，当接枝单体（MA）、交联剂（氧化锌）和引发剂（过氧化二异丙苯）用量分别为15，4和01份时，共混物的拉伸性能较好；红外光谱分析证明，MA已成功地接枝在BR大分子链上。
关键词：BR；NBR；PVC；共混物；马来酸酐；接枝；离子交联；相容性

中图分类号：TQ3332；TQ3337；TQ3253文献标识码：B文章编号：1000890X(2005)09053104
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。