NR/PMMA互穿网络共混物性能的研究

以NR和甲基丙烯酸甲酯（MMA）为主要原材料（NR／MMA用量比为60／40）制备NR／聚甲基丙烯酸甲酯（PMMA）互穿网络共混物，研究其物理性能，并与NR／PMMA动态硫化共混物进行对比。结果表明，共混体系中MMA发生聚合反应生成了PMMA，且与NR形成了一定的互穿结构；随着硫化剂DCP和交联剂DVB用量的增大，NR／PMMA互穿网络共混物的50％定伸应力、拉断强度和撕裂强度提高，拉断伸长率降低；NR／PMMA互穿网络共混物的拉伸性能优于NR／PMMA动态硫化共混物。     

PS／PA6／SEBS-g-MA共混体系的非等温结晶行为、流变性能及力学性能的研究

聚苯乙烯（PS）／聚酰胺（PA6）共混物中加入5份的马来酸酐接枝氢化苯乙烯-丁二烯嵌段共聚物（SEBS-g—MA），提高了PA6的结晶度，但使结晶时问延长。非等温结晶动力学研究表明，在结晶前期，SEBS-g—MA可能对PS／PA6中的PA6有异相成核的作用，结晶后期，PS／PA6和PS／PA6／SEBS-g—MA的结晶方式基本一致。加入SEBS-g—MA，原位生成SEBS-g-PA6，提高了共混物的复数黏度（η^＊）和储能模量（G’），在G’相同的情况下，PS／PA6／SEBS-g-MA的损耗模量（G″）低于PS／PA6。PS／PA6／SEBS-g—MA（50／50／5）共混物的冲击强度较PS／PA6（50／50）略有降低，拉伸强度略有提高。当SEBS-g-MA的用量大于5份后，拉伸强度降低，断裂伸长率增加，共混物的冲击强度随SEBS-g—MA含量的增加不断提高，PS／PA6／SEBS-g—MA（50／50／20）的冲击强度提高了2．4倍。     

丁腈橡胶-聚丙烯腈互穿网络材料的合成与耐油性能研究

通过利用丙烯腈在丁腈橡胶(NBR)硫化过程中原位聚合,制备了NBR交互聚丙烯腈复合材料,并研究了NBR腈含量、丙烯腈用量以及交联剂用量对NBR互穿网络复合材料(NBR-IPN)耐油性能的影响。结果表明,丙烯腈与NBR共混后在硫化过程中丙烯腈原位聚合制备互穿网络复合材料,各项性能均优于传统NBR,但会使得断裂伸长率略有下降;高腈含量NBR互穿网络化后耐油性能提高更为明显;丙烯腈用量为10质量份左右、交联剂偶氮二异丁腈用量为3.5质量份左右时,互穿网络材料的耐油性能最佳。     

PS/EPDM反应性共混物的研究

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5min时，共混物综合性能较好。     

聚苯乙烯/交联丙烯酸甲酯共混物的制备及其发泡性能研究

将聚苯乙烯（PS）颗粒溶解到二乙烯基苯（DVB）、丙烯酸甲酯（MA）与偶氮二异丁腈（AIBN）的混合物中,通过加热引发MA聚合,获得PS/交联PMA共混物, 采用釜压法制备了PS/交联PMA共混物泡沫。采用全自动视频光学接触角测试仪、差示扫描量热仪、傅里叶变换红外光谱仪、动态力学分析仪对PS/交联PMA共混物的结构和性能进行了表征,并通过扫描电子显微镜对PS/交联PMA共混物泡沫的结构进行了表征。结果表明,交联PMA的引入能提高体系的成核效率,随着MA用量的增加,PS/交联PMA共混物的接触角从PS的100.5 °降至86.1 °;当MA的用量为9.6份（质量份,下同）时,PS/交联PMA共混物的泡孔尺寸主要分布在40~60 μm之间,泡孔尺寸分布明显变窄,泡孔密度达到了1.2×10⁸ 个/cm³。     

聚合物共混物的红外光谱研究

采用傅立叶变换红外光谱（FTIR）技术，同时将谱图进行归一化处理，通过合谱共混谱研究了氯丁橡胶（CR）／聚氯乙烯（PVC）和CR／聚苯乙烯（PS）两个二元聚合物共混体系的相容性，结果表明，CR与PVC所组成的共混物中组分矣合物红外光谱特征吸收谱带发生较大位移，表现出较强的相互作用，CR与PS所组成的共混物的红外吸收特征峰发生了较小偏移，同时特征峰形略有变化，说明有较弱的相互作用。     

EA／St—AN互穿聚合物网络的加工和力学性能

以丙烯酸乙酯为软单位，苯乙烯和丙烯腈为硬单体，二乙烯基苯或三乙二醇双丙烯酸酯为交联剂，采用多步种子乳液聚合技术制备了半互穿和全互穿聚合物网络，研究了软、硬单体配比，交联剂用量，加工次数对共聚物流变行为、力学性能和结构形态的影响。结果表明，制备的半互穿和全互穿聚合物网络均可在适宜的条件下流动成型。如果配方选择适当，反复加工后力学性能基本不变。     

蓖麻油型聚氨酯/PS同步IPNs的协同效应研究

采用同步互穿网络技术,制备了一系列蓖麻油型聚氨酯/聚苯乙烯（COPU/PS）互穿网络聚合物（IPNs）,研究了它们的力学性能和溶胀性能.结果表明,当PS/COPU、BPO（过氧化二苯甲酰）/St（苯乙烯）质量分数分别为30%和1.5%时,三羟甲基丙烷（TMP）和蓖麻油羟基的摩尔比、NCO与OH的摩尔比分别为0.2和1.3时,互穿网络材料的相容性好,协同效应明显,此时力学性能最佳.当COPU/PS的IPNs材料中PS质量分数为20%～40%时,由于两相的互穿作用,使二甲苯对IPNs材料的溶胀趋缓;并且随着交联剂TMP的增加,平衡溶胀增重率增幅变小,到TMP和蓖麻油的羟基摩尔比值大于0.2后,平衡溶胀增重率基本不变.     

丙烯酸和苯乙烯改性PP/PS结晶与熔融行为

制备了苯乙烯（St）、St与丙烯酸（AA）混合物、丙烯酸接枝聚丙烯（PP-g-AA）改性聚丙烯／聚苯乙烯（PP／PS）共混物以及AA，St改性PP（原位形成PP／PS共混物）。用差示扫描量热仪（DSC）研究了3种改性方法对共混物中PP结晶与熔融行为的影响。结果表明，PS对PP的结晶与熔融温度影响不大，PP-g-AA则提高共混物中PP的结晶温度。St以及St与AA混合单体对PP／PS中PP结晶温度影响不大，但AA改性提高PP／PS中PP结晶温度。St加入PP导致PP结晶温度下降，St与AA混合单体原位聚合则提高PP的结晶温度。改性对共混物中PP的熔融温度影响不大，但是熔融峰形与结晶温度高低有关。红外光谱证实St与AA混合单体改性PP中有PP-g-AA形成，但改性共混物中没有PP-g-AA形成。     

SEP/蒙脱土混杂材料对PP/PS共混物性能的影响

研究了苯乙烯一乙烯／丙烯二嵌段的共取物（SEP）及其与改性蒙脱土的混杂材料对PP／PS共混物的形态、冲击强度和拉伸强度的影响。结果表明，对于PP／PS共混物，SEP／CJ1－MONT混杂材料对PP／PS共混物的增韧增强效果比SEP更强。     

DCP／MgO复合硫化体系的PUR／CR共混物硫化特性

采用硫化特性参数、溶胀指数和DSC谱图等表征了聚氨酯橡胶(PUR)/氯丁橡胶(CR)共混胶的共硫化性能,并研究了PUR/CR的共混比、补强体系与软化体系等对共混胶的硫化特性的影响.结果表明,采用过氧化二异丙苯/氧化镁(DCP/MgO)复合硫化体系,可以使PUR/CR共混胶达到共硫化;增加PUR和炭黑的用量,减少软化剂的用量,则共混胶料的转矩增大;增加PUR用量,可以加快共混胶料的硫化速度,其它因素对硫化速度的影响不明显.当PUR/CR共混比为20/80、DCP 3份、MgO 4份、炭黑N550 30份、软化剂聚异丁烯(PIB)5份时,共混硫化胶有较好的综合性能.     

CR/CIIR并用胶的性能研究

试验研究CR／CIIR并用胶的性能。结果表明。采用氧化锌／硫黄硫化体系的CR／CIIR并用胶共硫化性较好；当CR／CIIR并用比为80／20、补强剂为炭黑N550（用量40份）、增塑剂为固体古马隆树脂（用量10份）时，并用胶的综合物理性能较好。     

废报纸粉填充聚丙烯材料的研究

本文介绍废报纸粉填充聚丙烯（ＰＰ）的研制。通过在体系中加入高分子偶联剂马来酸酐（ＭＡＨ）接枝ＰＰ（ＭＡＰＰ）来改善纸粉与ＰＰ基体的相容性，并针对纸粉填充后材料变脆的问题，用乙丙橡胶（ＥＰＤＭ）和乙烯醋酸乙烯共聚物（ＥＶＡ）对材料进行增韧，均取得显著的效果。所制材料的纸粉填充量（质量分数）可高达５０％～６０％，价廉、质轻、其主要性能好于桑塔纳轿车用木粉填充ＰＰ板，可望有较好的应用前景。当纸粉填充量（质量分数）为４０％～５０％时，主要性能：弯曲强度６９．０１～７４．８３ＭＰａ，杨氏弯曲模量２６４０～２９９６ＭＰａ，冲击强度１３．２５～１３．５０ｋＪ／ｍ２。     

新型角位移阻尼器用橡胶材料试验配方研究

基于新型角位移阻尼器使用条件,研究了溴化丁基橡胶/氯丁橡胶并用胶试验配方.结果表明,当溴化丁基橡胶/氯丁橡胶并用比为60/40,采用硫黄/氧化锌/促进剂复合硫化体系,并加入60份炭黑N220和25份树脂C5时,并用胶可实现力学性能与阻尼性能的平衡,较好地满足了新型角位移阻尼器用高阻尼橡胶材料的要求.     

Modified polydimethylsiloxane/polystyrene blended IPN pervaporation membrane for ethanol/water separation

In this article a modified polydimethylsiloxane (PDMS) blended polystyrene (PS) interpenetrating polymer network (IPN) membranes supported by Teflon (polytetrafluoroethylene) ultrafiltration membrane were prepared for the separation of ethanol in water by pervaporation application. The relationship between the surface characteristics of the surface‐modified PDMS membranes and their permselectivity for aqueous ethanol solutions by pervaporation are discussed. The IPN supported membranes were prepared by sequential IPN technique. The IPN supported membrane were tested for the separation performance on 10 wt % ethanol in water and were characterized by evaluating their mechanical properties, swelling behavior, density, and degree of crosslinking. The results indicated that separation performance, mechanical properties, density, and the percentage of swelling of IPN membranes were influenced by degree of crosslink density. Depending on the feed temperature, the supported membranes had separation factors between 2.03 and 6.00 and permeation rates between 81.66 and 144.03 g m^?2 h^?1. For the azeotropic water–ethanol mixture (10 wt % ethanol), the supported membrane had at 30°C a separation factor of 6.00 and a permeation rate of 85 g m^?2 h^?1. Compared to the PDMS supported membranes, the PDMS/PS IPN supported blend membrane ones had a higher selectivity but a somewhat lower permeability. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

Highly crosslinked micron‐sized,monodispersed polystyrene particles by semicontinuous dispersion polymerization. II. Semicontinuous,delayed addition and seeded semicontinuous processes

A highly crosslinked, monodispersed polystyrene (PS) particle was prepared by the seeded semicontinuous dispersion polymerization using ready‐made monodispersed PS seed particles. The effects of Styrene (in 2nd stage)/Styrene (in PS seed) ratio, addition point and feeding time of divinylbenzene (DVB), concentration of DVB and polymerization temperature on the particle size, size distribution and morphology of the resulting particles were investigated. Monodispersed PS particles with 15 wt % of the DVB were prepared at 1/1 in St/St ratio, In comparison, highly crosslinked monodispersed and smooth‐surfaced PS particles containing up to 70 wt % of the DVB were effectively prepared at 0/1. 5% weight loss of the PS particles determined by TGA occurred from 353.3 to 389.6°C and the degree of swellability in toluene decreased from 113 to 101% as the DVB concentration increased from 10 to 70 wt %, implying increased thermal stability and solvent resistance due to the increase of the crosslink density. This study demonstrates that the seeded semicontinuous process, primarily with the starved condition at the second stage, is an efficient way to obtain highly crosslinked, monodispersed PS particles. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

原位增容PS/LLDPE共混物的结构与性能

在熔融状态下,利用大分子之间的Friedel-Crafts烷基化反应就地增容聚苯乙烯(PS)/线型低密度聚乙烯(LL-DPE)共混物。考察了AlCl3用量对高PS含量PS/LLDPE(80/20,质量比,下同)共混物的PS接枝百分比和力学性能的影响,同时研究了增容前后共混物的热性能与微观结构。结果表明,在PS/LLDPE共混物中加入0.4份的AlCl3,PS的接枝百分比较高;与简单共混体系相比,共混物力学性能与热稳定性都有所提高,同时PS也有一定程度的降解。     

Bentonite as a reinforcing and compatibilizing filler for natural rubber and polystyrene blends in latex stage

Bentonite clay was used as a reinforcing and compatibilizing filler for natural rubber/polystyrene (NR/PS) blend via latex blending process. The reinforcing and compatibilizing performance of bentonite clay in the NR/PS blends were evaluated. The improvement of the mechanical properties of NR/PS blends with the weight ratios of 90/10, 80/20, and 70/30 was found with the addition of 3 and 5 parts per hundred rubber (phr) clay. The characterization by using Fourier transform infrared spectroscopy and X‐ray diffraction (XRD) gave the evidence that the silicate layer was intercalated by NR and PS molecular chains. The morphology of tensile fracture surface by scanning electron microscope showed the separated phase boundaries of PS and NR blend and gradual disappearance with the bentonite content. This could be implied that the bentonite contributes to the compatibilization between PS and NR. The compatibilization action of the bentonite clay was also reflected by the shift of glass transition temperature (T_g) of NR to higher temperatures than those of the blends. These results suggested that the tensile and tear properties of the blends were controlled by compatibility between NR and PS. The most enhanced properties of blends were found with the addition of 3 phr bentonite clay. POLYM. ENG. SCI., 54:1436–1443, 2014. © 2013 Society of Plastics Engineers