淀粉/SBR复合材料的吸水性对力学性能的影响

研究了淀粉／SBR复合材料以及淀粉／炭黑／SBR复合材料常温下浸水90d时吸水率和静态力学性能的变化，研究结果表明：淀粉用量增加，复合材料的吸水率增加；含20份淀粉的淀粉／SBR复合材料以及淀粉／炭黑／SBR复合材料在常温下浸水90d后，吸水率分别为8．5％和7．5％；淀粉的用量在20份范围内，随着材料浸水时间的延长，淀粉／炭黑／SBR复合材料的力学性能与纯SBR硫化胶和炭黑／SBR复合材料力学性能变化的趋势一致。材料的力学性能浸水30d内有所波动，当浸水至90d时，与未浸水时的相差不大。     

酚醛树脂对淀粉/SBR复合材料结构和性能的影响

将自制的间苯二酚甲醛树脂（RF）用于改性淀粉糊，制备了原位改性的淀粉／SBR复合材料．考察了RF用量对复合材料微观结构及各项性能的影响。研究表明，添加少量（0．3份）RF可对复合材料的性能产生较明显的影响；随着RF用量的增加，复合材料的定伸应力、拉伸强度、撕裂强度进一步提高．且当用量在1．2份左右时．其综合增强效应可达到最佳效果。     

淀粉/炭黑/SBR复合材料的性能研究

采用直接共混法制备淀粉/炭黑/SBR复合材料,并对其性能进行研究.结果表明,随着淀粉用量的增大,淀粉/炭黑/SBR复合材料的邵尔A型硬度、300%定伸应力和拉伸强度减小,拉断伸长率、拉断永久变形和阿克隆磨耗量增大,撕裂强度先增大后减小,滚动阻力和生热总体呈降低趋势,抗湿滑性能提高.     

淀粉/白炭黑/PSBR复合材料的性能研究

采用机械共混法制备淀粉/白炭黑/粉末SBR(PSBR)复合材料,研究淀粉/白炭黑用量比对复合材料性能的影响.结果表明,随着淀粉/白炭黑用量比的增大,淀粉/白炭黑/PSBR复合材料邵尔A型硬度、定伸应力、拉伸强度和撕裂强度先增大后减小,抗湿滑性能提高,滚动阻力和耐热空气老化性能呈下降趋势.     

碳纳米管补强丁苯橡胶/聚氯乙烯共混物的研究

研究碳纳米管用量对丁苯橡胶（SBR）/聚氯乙烯（PVC）共混物性能的影响。结果表明：碳纳米管微观呈长条状聚集态,聚集体由大量碳纳米管纠缠而成,碳纳米管直径为10～35 nm;随着碳纳米管用量的增大,SBR/PVC共混物的FL,Fmax和Fmax－FL逐渐增大,t10和t90呈缩短趋势,硬度、定伸应力、拉伸强度和撕裂强度逐渐增大,拉断伸长率逐渐减小,当碳纳米管用量为10份时,SBR/PVC共混物的物理性能较优;SBR/PVC共混物的储能模量和损耗模量随着应变的增大而减小,随着碳纳米管用量的增大而增大,损耗因子随着应变的增大而增大,随着碳纳米管用量的增大而呈减小趋势。     

针状硅酸盐/SBR复合材料的性能研究

对凹凸棒石进行表面改性得到预处理凹凸棒石（PAT），研究PAT／SBR复合材料的加工性能、物理性能及动态力学性能等。结果表明，PAT用量增大，PAT／SBR复合材料的门尼粘度先升后降，t10和t90缩短，邵尔A型硬度、定伸应力和拉伸强度提高，耐磨性能下降，压缩疲劳温升、永久变形和损耗因子tanδ值增大；PAT和预处理白炭黑（PWCB）用量相同时，PAT／SBR复合材料的门尼粘度、压缩疲劳温升和tanδ值小于、静压缩率和初动压缩率大于PWCB／SBR复合材料。     

玻璃微珠改性PP和LLDPE力学性能的比较研究

采用玻璃微珠(GB)改性聚丙烯(PP)和线性低密度聚乙烯(LLDPE)，对玻璃微珠的用量、粒径和复合材料加工方法对材料的力学性能的影响进行了比较研究。结果表明：随着GB用量的增加，单、双螺杆挤出GB／PP复合材料的拉伸模量、弯曲强度和弯曲模量均呈线性增长的趋势，而屈服强度则有小幅下降；断裂应变在低含量时有所提高，然后迅速下降；单双螺杆挤出材料的冲击强度均有所提高，并在一定范围内随GB用量的提高而增大，且单螺杆挤出材料的冲击强度略高于双螺杆挤出材料。而GB／LLDPE中，随着GB用量的增加，单螺杆挤出复合材料的拉伸模量、弯曲模量均呈线性增长趋势，而屈服强度和弯曲强度在含量较高时略有上升；双螺杆挤出复合材料的拉伸模量、屈服应力、弯曲强度和弯曲模量均呈线性增长的趋势，两者的断裂应变都有所降低，但没有严重劣化LLDPE复合材料的冲击特性。GB的粒径对两种复合材料的力学性能影响不大，但对GB／PP复合材料的韧性有较大影响。单、双螺杆挤出GB／PP复合材料的冲击强度在一定范围内较纯料有一定提高；同样的，双螺杆挤出复合材料的冲击强度低于单螺杆挤出材料。     

乙烯-甲基丙烯酸共聚物增容PE-HD／木纤维复合材料的研究

以乙烯-甲基丙烯酸共聚物（EMAA）作为增容剂，采用木纤维对高密度聚乙烯（PE—HD）进行填充改性。研究了增容剂的相对分子质量、官能团含量以及木纤维用量对木塑复合材料性能的影响。结果表明，复合材料的拉伸强度、弯曲强度和弯曲模量随着木纤维用量的增加而大幅度提高，而冲击性能则明显降低；与未添加增容剂的复合材料相比，增容剂的加入进一步改善了木塑复合材料的弯曲和拉伸性能；当木纤维用量达到50％（质量含量，下同）时，复合材料的拉伸强度、弯曲强度和弯曲模量分别可达26gPa、40gPa和1807gPa。当EMAA酸值相同时，随着相对分子质量的增大，所制得复合材料的各项性能均提高。     

SBS/粘土纳米复合材料的制备和性能研究

通过溶液插层法制备了苯乙烯—丁二烯—苯乙烯聚合物(SBS)／粘土纳米复合材料，并用X射线衍射透射电子显微镜分析其纳米分散结构及形态。研究结果表明：所得复合材料为插层型纳米复合材料；与SBS相比，SBS／粘土纳米复合材料断裂拉伸强度和300％定伸强度显著提高，储能模量明显提高。     

云母填充高密度聚乙烯复合材料的力学性能

考察了云母对填充高密度聚乙烯（HDPE）复合材料的力学性能的影响。结果表明，复合材料的拉伸强度、弯曲强度和弯曲模量随着云母用量的增加而提高。当云母质量分数小于5％时，复合材料的断裂伸长率随着云母用量的增加而增大，而冲击强度则明显下降；当云母质量分数大于5％后，两者均随着云母用量的增加而减小。     

纳米碳酸钙/二氧化硅复合粒子对丁苯橡胶物理机械性能的影响

采用溶胶沉淀法制备了纳米CaCO3/SiO2复合粒子,并用不同改性剂对其进行表面改性,考察了改性复合粒子对丁苯橡胶(SBR)物理机械性能的影响,同时与硬脂酸钠改性纳米CaCO3填充的SBR硫化胶做了比较。结果表明,CaCO3/SiO2复合粒子粒径为40～50 nm,大小均匀,表面粗糙,SiO2包覆在纳米CaCO3表面,具有核壳结构;硬脂酸钠改性复合粒子填充SBR硫化胶的拉伸强度、撕裂强度、永久变形和邵尔A硬度均大于改性纳米CaCO3填充SBR硫化胶,最大拉伸强度可达到13.6 MPa,两者的300%定伸应力和扯断伸长率相当;用硬脂酸钠和Si 69协同改性的纳米CaCO3/SiO2填充SBR硫化胶的拉伸强度、300%定伸应力、撕裂强度和邵尔A硬度均明显优于硬脂酸钠改性复合粒子填充的SBR硫化胶,最大拉伸强度达到14.1 MPa,扯断伸长率减小,低填充量时两者的永久变形差别不大,高填充量时前者的永久变形低于后者。     

粘土/淀粉/炭黑/SBR复合材料的制备与性能研究

以少量淀粉和粘土等量替代炭黑,制备粘土/淀粉/炭黑/SBR复合材料,并对其性能进行研究。结果表明:与炭黑/SBR复合材料相比,淀粉/炭黑/SBR复合材料撕裂强度和抗湿滑性能提高,伸张疲劳次数增多,定伸应力和耐磨性能大幅下降,且压缩温升增大;与淀粉/炭黑/SBR复合材料相比,粘土/淀粉/炭黑/SBR复合材料定伸应力和耐磨性能提高,压缩生热降低且抗湿滑性能较好。     

Impact of functionalised dispersing agents on the mechanical and viscoelastic properties of pigment coating

The effect of poly(acrylic acid) – poly(styrene sulphonic acid) (AA-SSA) and poly(acrylic acid) – poly(2-acrylamido-2-methylpropane sulphonic acid) (AA-AMPS) dispersing agents on the viscoelastic and mechanical properties of precipitated calcium carbonate-latex composites used was investigated. Four different formulations were prepared using carboxylated styrene butadiene (SBR) and styrene-acrylate (SA) latexes. Pore space was characterised using mercury porosimetry. The storage modulus and loss factor were evaluated through dynamic mechanical thermal analysis (DMTA) low frequency single cantilever bending mode. The ultimate tensile strength and the Young modulus were also measured. At low latex contents, storage modulus was found to be higher for SBR latex composites. At high latex content, the SA storage modulus was found to be higher. It is suggested that at lower latex content, the viscoelastic properties are function of physical microstructure, which at low latex is influenced by the latex glass transition temperature (Tg). Softer latex spreads more on the pigment surface providing higher stiffness, since pigments are held together by latex bridges. At higher latex content, the composite stiffness tends to be more dependent on the stiffness of the pure latex. The AA-SSA dispersant creates strong pigment–latex interfacial adhesion in dry composites, which is reflected in high elastic modulus and tensile strength. The AA-AMPS dispersant formulations had greater resistance to water. Due to the compatibility between the AMPS blocks and the SBR latex within the composite, higher storage modulus stability in water saturated composites is measured (at room temperature 56% of the storage modulus is preserved).     

UFPCSBR/n-SiO_2纳米粉末材料改性NR/SBR复合材料性能的研究

研究了超细全硫化羧基丁苯橡胶/纳米二氧化硅(UFPCSBR/n-SiO2)纳米复合粉末材料的表面形貌及其对NR/SBR复合材料硫化特性和力学性能的影响。结果表明,UFPCSBR颗粒和n-SiO2颗粒在纳米复合粉末材料中分散良好;加入14份纳米复合粉末材料(UFPCSBR/n-SiO2质量比为3/4)赋予了NR/SBR复合材料较好焦烧安全性,可显著改善100%定伸应力和300%定伸应力,并且拉伸强度、撕裂强度和拉断伸长率均稍有提高。     

Effect of Attapulgite filler on the properties of Nylon‐6

Nylon‐6/Attapulgite (ATP) composites were prepared by melt blending in a twin screw extruder. Nylon‐6/ATP composites were tested for its mechanical, rheological, thermal and morphological properties. The results have shown drastic improvement in the flexural modulus by 74% at the loading level of 4% of ATP. The tensile strength was also increased at the 3–4% loadings of ATP. The impact strength was doubled even at the 2% loading of ATP. The strength and stiffness of Nylon‐6/ATP composites were both improved significantly in the presence of attapulgite. In addition, the incorporation of ATP gave rise to the increase in the storage modulus. The extensional viscosities were studied and found to increase as the loading level was increased. Scanning electron microscopy (SEM) was used to assess the clay morphology and the dispersion of the attapulgite. SEM revealed the addition of attapulgite showed fibrillar structure of Nylon‐6/ATP composite. POLYM. COMPOS., 2008. © 2008 Society of Plastics Engineers     

两种橡胶/有机累托石纳米复合材料的结构与性能

比较了用熔体法制备的有机累托石(OR)/丁苯橡胶(SBR)以及有机累托石(OR)/天然橡胶(NR)2种纳米复合材料的结构与性能.TEM和XRD对材料的分析显示,由于橡胶基体的性质差异,OR/SBR为典型的插层型结构,而OR/NR为插层型和部分剥离型混合结构.应力应变行为的研究表明,随着OR用量的增加,OR/SBR的拉伸强度和拉断伸长率均增大,这主要是分子链滑移和填料的取向造成的.对于拉伸结晶型橡胶NR,由于部分剥离型填料的增强作用,NR的定伸应力随填料用量的增加而逐渐提高.由于对结晶的阻碍作用,当OR用量为20份时,OR/NR的拉伸强度有所降低.纳米累托石的加入可以显著提高SBR和NR的硬度和撕裂强度.热失重分析表明,OR/橡胶纳米复合材料与相应的纯橡胶相比,热稳定性提高,在NR体系中更为显著.     

疏水改性淀粉/丁苯胶复合材料性能的研究

采用苄基氯对淀粉进行疏水改性,制备疏水淀粉/丁苯胶复合材料并对其性能进行研究。结果表明,随着疏水淀粉加入量的增加,硫化和焦烧时间总体呈缩短趋势,复合材料的邵尔A型硬度、拉伸强度、撕裂强度和拉断伸长率都呈现上升趋势,DIN磨耗量减小;耐热空气老化性能有所下降。     

Fabrication and characterization of rice bran carbon/styrene butadiene rubber composites fabricated by latex compounding method

Novel rice bran carbon (RBC) filled styrene butadiene rubber (SBR) composites were fabricated by latex compounding method (LCM). The chemical structure determination and the static precipitation experiments definitely authenticated the hydrophilicity of RBC, which enables RBC to be uniformly dispersed in water without surface modification and thereby compounded with rubber latex directly. The SBR/RBC composites prepared by LCM exhibited homogeneous filler dispersion state and superior mechanical properties compared with those compounded by solid compounding method (SCM). The vulcanization properties, mechanical properties, thermal stabilities, and swelling properties of SBR/RBC composites prepared by LCM were studied. It was revealed that the tensile strength, modulus, and tear strength of SBR/RBC composites increased correspondingly as the RBC loading increased from 0 to 80 phr. The decomposition temperature would stop rising when the filler loading exceeded 40 phr. The significant increases of the crosslink density with increasing filler volume content indicated the reinforcement effect of RBC. POLYM. COMPOS., 38:2594–2602, 2017. © 2015 Society of Plastics Engineers