超细碳酸钙超充粉末丁苯橡胶的制备

将高分子电解质包覆剂和超细碳酸钙加入丁苯胶乳中，通过共凝聚法制得粉末丁苯橡胶（PSBR）。实验结果表明，PSBR粒径不大于0．9mm,具有良好的力学性能。PSBR的粒径主要由包覆剂的用量决定，超细碳酸钙对橡胶粒子有隔离作用。     

超细碳酸钙填充粉末丁苯橡胶的制备

将高分子电解质包覆剂和超细碳酸钙加入丁苯胶乳中，通过共凝聚法制得粉末丁苯橡胶（PSBR）。实验结果表明，PSBR 粒径不大于0.9mm，具有良好的力学性能。PSBR的粒径主要由包覆剂的用量决定，超细碳酸钙对橡胶粒子有隔离作用。     

粉末丁苯橡胶改性PS回料研究

用粉末丁苯橡胶（PSBR）对PS回料进行了改性研究。结果表明，增韧剂选用粉末丁苯橡胶，PS回料中加入适量的正品PS，配比（以质量计）为PS回料70-95份，PS正品5-30份。PSBR5-30份。通过挤出机挤出造粒，能得到性能较好的改性PS塑料。     

动态硫化PSBR/PE共混型热塑性弹性体的研究

采用动态硫化法制备了粉末丁苯橡胶（PSBR）／聚乙烯（PE）共混型热塑性弹性体（TPO），研究了共混比、硫化体系、填料种类及用量、加工工艺对共混胶力学性能的影响。结果表明，当PSBR／PE共混比为60／40并采用传统硫化体系、白炭黑作补强剂时，TPO综合性能较好。     

丁苯弹性体/蒙脱土复合材料改性老化沥青

将粉末丁苯橡胶(PSBR)或苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)与蒙脱土(MMT)制成复合材料,用于改性老化沥青(PSBR质量分数3%,SBS质量分数5%),研究了复合材料及其改性老化沥青的结构,考察了MMT用量对复合材料改性老化沥青物理性能与高温贮存稳定性的影响.结果表明,在PSBR/MMT复合材料中,MMT与PSBR形成了插层结构;在PSBR/MMT和SBS/MMT复合材料改性老化沥青中,复合材料呈球状分布;当MMT用量过大时,部分MMT滞留在聚合物中,出现颗粒MMT;复合材料对老化沥青的物理性能改性优于单独加入MMT;PSBR/MMT复合材料可改善老化沥青的高低温性能;SBS/MMT复合材料可显著改善老化沥青的高温性能;MMT用量不同时,PSBR/MMT复合材料改性老化沥青的贮存稳定性相当;当SBS/MMT(质量比)为5/3时,复合材料改性老化沥青的贮存稳定性较佳.     

粉末丁苯橡胶反应性共混改性沥青及其高温贮存稳定性

采用反应性共混法,用粉末丁苯橡胶(PSBR)对兰州石化公司生产的重交沥青进行改性.研究了PSBR的用量、硫化剂和稳定剂的种类及其用量对沥青性能的影响,并进行了改性沥青优化配方的平行实验.结果表明,在PSBR/复合硫化剂/高岭土(质量比)为4/0.05/0.4时,可得到高温(163℃)下贮存144h、离析度不大于2.5℃的PSBR改性沥青,能满足生产、贮存和使用的要求.     

共凝聚法PSBR改性PVC的研究

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。     

超细碳酸钙/粉末丁苯橡胶的制备及在PVC中的应用

本文用超细碳酸钙（CaCO3）作为隔离剂和不同的包覆剂,通过凝聚法制备粉末丁苯橡胶（PBSR）.当超细CaCO3与PBSR质量比为50/100,包覆剂Coron树脂结构组成中马来酸酐和苯乙烯质量比为7/3,用量占PSBR质量的9%时,所得的超细CaCO3/PSBR粒径小于1mm,比未加超细CaCO3的PSBR小一倍左右.当PSBR/PVC的质量比为15/100,CaCO3/PSBR与PVC混合制得复合材料的拉伸强度比PSBR与PVC制得复合材料提高了约15%,缺口冲击强度提高了60%左右.     

动态硫化制备粉末丁苯橡胶/聚丙烯合金的研究

采用双螺杆动态硫化工艺,用粉末丁苯橡胶(PSBR)改性聚丙烯(PP)制备了PSBR/PP共混物,考察了二者的质量比、软化剂、补强剂和加工工艺对共混物性能的影响,并对体系的耐老化性能进行了初步研究。结果表明,当PSBR与PP质量比为12/88时,使用软化剂可提高共混物的加工流动性;纳米高岭土对共混物有较明显的增强作用;用动态硫化工艺制得共混物的性能优于非动态硫化工艺制得的共混物。     

共混型聚丙烯/超细粉末丁苯橡胶全硫化热塑性弹性体的制备及其结构与性能

以全硫化超细粉末丁苯橡胶(PSBR)与聚丙烯(PP)为原料,采用双螺杆挤出机共混方法制备PP/PSBR全硫化热塑性弹性体。通过透射电镜观测,发现PP/PSBR全硫化热塑性弹性体具有和动态硫化方法制备的热塑性弹性体相似的微观形态,PSBR粒子作为分散相分散在连续相PP中;所制备的热塑性弹性体的力学性能与PP的相对分子质量、共聚与否、PSBR含量及其交联度有关;通过流变行为研究,发现此类全硫化热塑性弹性体为假塑性流体,且橡胶的含量对热塑性弹性体的黏度影响很小;采用差示扫描量热法对PP/PSBR全硫化热塑性弹性体中连续相PP的结晶行为进行了研究,发现连续相PP的结晶温度提高,表明PSBR对PP有异相成核作用。     

粉状填充剂对橡胶复合材料拉断伸长率的影响

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。     

Particle size distribution,mixing behavior,and mechanical properties of carbon black (high‐abrasion furnace)–filled powdered styrene butadiene rubber

High‐abrasion furnace black (HAF, grade N330)–filled powdered styrene butadiene rubber [P(SBR/HAF)] was prepared and the particle size distribution, mixing behavior in a laboratory mixer, and mechanical properties of P(SBR/HAF) were studied. A carbon black–rubber latex coagulation method was developed for preparing carbon black–filled free‐flowing, noncontact staining SBR powders, with particle diameter less than 0.9 mm, under the following conditions: carbon black content > 40 phr, emulsifier/carbon black ratio > 0.02, and coating resin content > 2.5 phr. Over the experimental range, the mixing torque τ_α of P(SBR/HAF) was not as sensitive to carbon black content and mixing temperature as that of HAF‐filled bale SBR (SBR/HAF), whereas the temperature build‐up ΔT showed little dependency on carbon black content. Compared with SBR/HAF, P(SBR/HAF) showed a 20–30% mixing energy reduction with high carbon black content (>30 phr), which confers to powdered SBR good prospects for internal mixing. Carbon black and the rubber matrix formed a macroscopic homogenization in P(SBR/HAF), and the incorporation step is not obvious in the internal mixing processing results in these special mixing behaviors of P(SBR/HAF). A novel mixing model of carbon black–filled powdered rubber, during the mixing process in an internal mixer, was proposed based on the special mixing behaviors. P(SBR/HAF) vulcanizate showed better mechanical properties than those of SBR/HAF, dependent primarily on the absence of free carbon black and a fine dispersion of filler on the rubber matrix attributed to the proper preparation conditions of noncontact staining carbon black–filled powdered SBR. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 2494–2508, 2004     

用凝聚法制备粉末丁腈橡胶

以非交联或交联剂的丁腈－４０胶浆为原料，用正凝聚法使橡胶杨粉得到粉末橡胶淤浆，再加入隔离剂防粘结，经过滤，洗洗，过滤，干燥而掉得粒烃大于１．２５ｍｍ，橡胶含量大于９０％的粉末丁腈橡胶。研究了凝聚方式，隔离剂，凝聚剂，胶浆稳定性，凝聚条件，凝聚设备的结构等对成粉率的影响，成粉率达９０％以上，并所制产品与国外同类产品进行了比较。     

Use of natural rubber prophylactics waste as a potential filler in styrene–butadiene rubber compounds

Owing to the unstable nature of the latex compound and the strict specifications in the quality of latex products such as condoms and examination gloves, the rejection in the latex industry comes to about 10 to 15% of the rubber consumed. These latex rejects contain about 95% rubber hydrocarbon of very high quality. A cost-effective technique has been developed for the reuse of natural rubber (NR) prophylacties waste in styrene–butadiene rubber (SBR). The influence of powdered latex rejects on the curing characteristics, mechanical properties, and failure behavior of SBR has been investigated. More emphasis is placed on the effect of both particle size and the loading of latex waste filler. Swelling studies were carried out to establish the degree of crosslinking of SBR and to assess the extent of interaction between the matrix and latex waste filler of varying particle sizes. A three layer model has been set up to study the diffusion of sulfur from the matrix phase to the filler phase. Scanning electron microscopy has been used to analyze the particle morphology, filler dispersion, and filler-matrix interface adhesion. The results of the study revealed that NR prophylactics rejects can be used effectively as a potential filler in SBR up to about 40 phr loading. © 1996 John Wiley & Sons, Inc.     

Mechanical and thermal behavior of styrene butadiene rubber composites reinforced with silane-treated peanut shell powder

Biocomposites of styrene butadiene rubber (SBR) reinforced with silane-treated peanut shell powder (SPSP) of different filler loadings and particle sizes were prepared by two roll mixing mills with sulfur as a vulcanizing agent. The cure characteristics of composites were studied, and they vulcanized at 160 °C. Test samples were prepared by compression moulding, and their physicomechanical properties, such as tensile strength tear strength, modulus, hardness, and abrasion resistance of SBR vulcanizates, were studied with filler loading 0, 5, 10, 15, and 20 parts per hundred rubber (phr). Composites with 10 phr filler having small particle size exhibited better properties. The interfacial adhesion between filler and matrix has a major role in the properties of composites. Surface modification of PSP was done by silane coupling agent to improve the interfacial adhesion and it characterised by FTIR, XRD, TGA, UV, and SEM. Better properties are shown by the composites with SPSP. Thermal stability of the composites was also determined using thermogravimetric analysis.     

高耐磨炭黑填充型粉末SBR研究Ⅱ.硫化胶的物理机械性能

研究了高耐磨炭黑(N330)填充型粉末丁苯橡胶[P(SBR／N330)]硫化胶的物理机械性能。结果发现。炭黑乳化剂的用量、炭黑改性剂和包覆剂的用量及玻璃化转变温度对P(SBR／N330)硫化胶的物理机械性能的影响比较明显。在适宜的粉末化条件下制备的P(SBR／N330)，其硫化胶的物理机械性能与块状SBR／N330通过机械混炼得到的硫化胶的物理机械性能处于相同水平。P(SBR／N330)硫化胶拉伸断面形貌的SEM分析表明，包覆剂在用量为5份时形成的粒子与SBR基体结合紧密，在用量为15份时形成的粒子较易剥离。     

固相法改性淀粉／炭黑／丁苯橡胶复合材料的制备与性能研究

采用固相法制备了淀粉接枝马来酸酐（MAH）和丙烯酸丁酯（BA）的共聚物Starch-gMAH／BA（SMB）。采用机械共混法用15phr的改性淀粉（SMB）代替等量的炭黑（CB）,制备了改性淀粉／炭黑／丁苯橡胶复合材料（SMt3／CB／SBR）,研究了复合材料的力学性能、热氧老化性能、动态力学性能以及微观形态。结果表明,SMB／CB／SBR复合材料的力学性能优于未改性淀粉／CB／SBR复合材料,拉伸强度及扯断伸长率等性能优于SBR／CB复合材料;且SMB／CB／SBR复合材料具有更好的耐热氧老化性能;与SBR／CB复合材料相比,SMB／CB／SBR复合材料具有更低的滚动阻力;微观形态显示,淀粉经改性后粒子尺寸减小,在SBR基体中的分散性得到改善,与SBR基体的相容性得到提高。     

超细丁苯粉末橡胶增韧聚丙烯的研究

采用一种新型超细丁苯粉末橡胶增韧聚丙烯(PP) ,考察了丁苯粉末橡胶用量、相容剂的种类及用量对PP性能的影响;观察了丁苯粉末橡胶在PP中的分散状态,研究了丁苯粉末橡胶对PP结晶性能的影响。结果表明:超细丁苯粉末橡胶的加入能够显著提高聚丙烯的韧性;加入相容剂B后的增韧效果更好;相容剂与超细丁苯粉末橡胶在PP中具有包藏结构;复合有成核剂的超细丁苯粉末橡胶比相容剂B有更明显的成核作用,可提高PP的结晶度,从而使PP的刚性和耐热性提高。少量相容剂B与之复合后,仍可保持这种较强的成核能力。     

水泥改性用丁苯胶乳的合成

采用种子乳液聚合法制备了丁苯共聚物/水泥复合材料专用丁苯胶乳,考察了复合乳化剂体系、种子胶乳用量、极性单体种类、聚合温度及加料方式等对乳胶粒尺寸及其分布和胶乳稳定性等的影响。结果表明,在小粒径种子体存在下,分批加乳化剂的加料方式是合成水泥专用丁苯胶乳的有效途径之一,平均粒径小且粒径分布窄的丁苯胶乳具有较好的稳定性。采用复合乳化剂体系、添加少量带极性的第三单体等可以较好地提高丁苯胶乳的化学和机械稳定性。