共轭三组分互穿聚合物网络的力学性能和形态：聚氨 …

基于共轭三组分互穿聚合物网络和界面共轭互穿这两个新概念,通过互穿聚合物网络技术成功地制备了聚氧化丙烯二元醇聚氨酯／聚（甲基丙烯酸甲酯－共－三烯丙基异氰脲酸酯）／废胶粉ＣＴＣ－ＩＰＮ（ＰＵ／Ｐ（ＭＭＡ－ｃｏ－ＴＡＩＣ）／ＳＲＰ－ＣＴＣ－ＩＰＮ）,研究了这种材料以及ＰＵ／ＳＲＰ共混笺的力学性能。结果表明,ＰＵ／Ｐ（ＭＭＡ－ｃｏ－ＴＡＩＣ）／ＳＲＰ－ＣＴＣ－ＩＰＮ由于含公共网络Ｐ（ＭＭＡ－ｃｏ－ＴＡＩＣ     

PU／PGMA同步互穿网络的固化反应动力学

研究各种动力学因素对同步互穿网络形成的影响。方法用傅里叶红外光谱法跟踪聚氨酯中ＮＣＯ基团及甲基丙烯酸缩水甘油酯中Ｃ＝Ｃ基团特征吸收峰的变化,分别得到其转化率与时间曲线。结果与结论研究了互穿网络中各组分与纯组分反应情况的差异;ＳＩＮ中ＰＵ和ＰＧＭＡ反应均为二级动力学反应,其反应活化能分别为２８．１和３５．６ｋＪ／ｍｏｌ;当改变ＰＵ催化剂时,根据红外跟踪得到转化率曲线,由转化率与凝胶点之间的关系对不同     

乙烯利诱导黄瓜雌花分化机理初探(简报)

乙烯利诱导黄瓜雌花分化机理初探（简报）于凤鸣刘玉艳杨越冬（河北农业技术师范学院园艺系，昌黎，０６６６００）ＰＲＥＬＩＭＩＮＡＲＹＳＴＵＤＹＯＮＴＨＥＭＥＣＨＡＮＩＳＭＯＦＣＥＰＡＩＮＤＵＣＩＮＧＦＥＭＡＬＥＦＬＯＷＥＲＳＯＦＣＵＣＵＭＢＥＲＴＯＤＩＶ...     

互穿网络集合物的自由体积特性

测量了不同组分比的聚氨酯／丙烯酸酯类树脂（ＰＵ／ＶＥＲＨ）的化学计量和化学不计量同时互穿网络聚合物ＳＩＮｓ的正电湮没寿命参数。研究结果表明两种ＳＩＮｓ随机组变化存在相转变过程,而且化学计量ＰＵ／ＶＥＲＨ ＳＩＮ两组分产强化学键作用减小ＳＩＮｓ平均自由体积孔洞尺寸,分子链段堆砌紧密,分子链段相互作用增强,从而增强了互穿效果,极大地改善了ＳＩＮｓ两组分之间的相溶性,从微观改善了互穿网络聚合物的力学性能     

食用油烟对大鼠体内脂质过氧化反应的影响

本研究采用动式染毒技术，将大鼠分成４个浓度组吸入豆油油烟（油温２２０℃），观察血中ＳＯＤ，ＧＳＨ，ＭＤＡ含量，肺组织中ＬＤＨ，ＡＣＰ，ＭＤＡ和肺巨噬细胞（ＰＡＭ）膜脂流动性（ＬＦＵ）等指标的变化，探讨吸入油烟的急性毒作用机理。实验结果表明：油烟平均浓度为１．０５ｍｇ／ｍ＾３时，血浆及肺组织中ＭＤＡ开始增加（Ｐ〈０．０５），且含量随吸入油烟量增加；平均浓度为９．５８ｍｇ／ｍ＾３时，全血ＳＯＤ活力明显     

磺化聚苯乙烯/聚氨酯共混体系的力学性能及形态结构

用电子拉力机、ＭＤＳＣ,ＦＴＩＲ、ＳＥＭ、ＳＡＸＳ研究了磺化聚苯乙烯（ＳＰＳ）／聚醚型聚氨酯（ＰＵ）共体系撂学性能和形态结构。结果表明,在溶液法制备的含磺酸基１２．８％（摩尔）的ＳＰＳ／ＰＵ共混体系中,ＳＰＳ含量小于８０％（质量）时,共混物的拉伸强度小于加和性计算值,吾抵消效应;ＳＰＳ含量大于８０％时,则呈协同效应,拉伸强度协同效应产生的原因是由于共混组分间离子交 形成以及分子间相互作用力增大,共     

POLYCYCLE－COMPOUNDING STRUCTURES AND REGIONAL LAYERSLIP－DIPSLIP SYSTEMS：IMPLICATIONS FOR THE TARIM BASIN，XINJIAN

ＰＯＬＹＣＹＣＬＥ－ＣＯＭＰＯＵＮＤＩＮＧＳＴＲＵＣＴＵＲＥＳＡＮＤＲＥＧＩＯＮＡＬＬＡＹＥＲＳＬＩＰ－ＤＩＰＳＬＩＰＳＹＳＴＥＭＳ：ＩＭＰＬＩＣＡＴＩＯＮＳＦＯＲＴＨＥＴＡＲＩＭＢＡＳＩＮ，ＸＩＮＪＩＡＮ￥ＳｕｎＹａｎ；ＪｉａＣｈｅｎｇｚａｏ（Ｄｅ...     

懒螽雌雄都能发声的研究初报

懒螽雌雄都能发声的研究初报张洪喜，周志芳（河北农业技术师范学院园艺系，昌黎，０６６６００）（河北省农林科学院石家庄果树研究所）ＡＰＲＥＬＩＭＩＮＡＲＹＳＴＵＤＹＯＮＳＯＵＮＤＩＮＧＯＦＢＯＴＨＭＡＬＥＡＮＤＦＥＭＡＬＥＤＥＲＡＣＡＮＴＨＡＯＮＯＳＰＡ...     

LEAKY LAMB WAVES IN MULTI-LAYERED FLUID-SATURATED POROUS MEDIA IMMERSED IN LIQUID

ＬＥＡＫＹＬＡＭＢＷＡＶＥＳＩＮＭＵＬＴＩ┐ＬＡＹＥＲＥＤＦＬＵＩＤ┐ＳＡＴＵＲＡＴＥＤＰＯＲＯＵＳＭＥＤＩＡＩＭＭＥＲＳＥＤＩＮＬＩＱＵＩＤＺｈｏｕＹｕｆｅｎｇ１）ＷａｎｇＹａｏｊｕｎ１）ＭａＬｉ２）ＧａｏＴｉａｎｆｕ２）（１）Ｉｎｓｔｉｔｕｔｅ...     

刚性无机粒子对PDMS／PU共混体系增强改性研究（I）

采用刚性无机粒子（ＳｉＯ２）填充不相容聚二甲基硅氧烷／聚氨酯（ＰＤＭＳ／ＰＵ）共混体系，重点研究了ＳｉＯ２表面处理剂种类、ＳｉＯ２填充量对不同结构的ＰＤＭＳ／ＰＵ共混体系力学性能的影响关系，研究结果表明：ＳｉＯ２经过适当偶联剂表面处理后，能显著地提高ＰＤＭＳ／ＰＵ（Ｍ）、ＰＤＭＳ／ＰＵ（Ｐ）共混物的力学性能，其抗张强度分别由３．４ＭＰａ、４．５ＭＰＡ提高到１２．３ＭＰａ和９．０ＭＰａ。     

共轭三组分互穿聚合物网络的力学性能和形态——聚氨酯/聚甲基丙烯酸甲酯/废胶粉体系

基于共轭三组分互穿聚合物网络 (CTC_IPN)和界面共轭互穿这两个新概念 ,通过互穿聚合物网络技术成功地制备了聚氧化丙烯二元醇聚氨酯 /聚 (甲基丙烯酸甲酯 共 三烯丙基异氰脲酸酯 ) /废胶粉CTC_IPN(PU/P(MMA_co_TAIC) /SRP_CTC_IPN ) ,研究了这种材料以及PU/SRP共混物的力学性能 .结果表明 ,PU /P(MMA_co_TAIC) /SRP_CTC_IPN由于含公共网络P(MMA_co_TAIC) ,其性能明显优于PU/SRP共混物 .用扫描电子显微镜 (SEM )和透射电子显微镜(TEM )研究了PU/P(MMA_co_TAIC) /SRP_CTC_IPN和PU/SRP共混物的断面形貌 ,结果表明 ,两者具有完全不同的断裂机理 .TEM结果表明 ,P(MMA_co_TAIC)网络能分别与PU及SRP网络互穿 ,从而改善了两者之间的界面结合     

The glass transition temperature and microstructure of polyurethane/epoxy resin interpenetrating polymer networks nanocomposites

GLASS TRANSITION TEMPERATURE (TG) HAS BEEN EXTEN- SIVELY STUDIED FOR MANY POLYMERS SINCE IT IS ONE OF THE MOST FUNDAMENTAL FEATURES RELATIVE DIRECTLY TO POLYMER PROPERTIES. IN GENERAL, INORGANIC NANOFILLERS DO NOT DI- RECTLY CONTRIBUTE TO THE TG OF THE MA…     

互穿聚合物网络的高分辨裂解色谱—质谱研究

本文用高分辨裂解色谱－质谱法（ＨＲＰｙＧＣ—ＭＳ）研究了聚醚型聚氨酯／聚（苯乙烯－共－二乙烯苯）互穿聚合物网络［ＰＵ／Ｐ—ｃｏ—ＤＶＢ）—ＩＰＮ］热分解过程的特征、裂解产物的组成和分布；ＩＰＮ与其组分聚合物的裂解谱图比较表明，ＰＵ／Ｐ（Ｓｔ—ｃｏ—ＤＶＢ）是一种两网络间不存在化学结合的典型的互穿聚合物网络。由热失重曲线发现ＩＰＮ材料有两个热分解阶段；从裂解产物的温度依赖性和分步裂解色谱分析并结合动态热重法结果讨论了其热分解机理。     

Interfacial interaction between polyurethane/poly (methacrylateco-styrene) coating and the regenerated cellulose film

Water-resistant films were prepared by coating the surface of regenerated cellulose films with castor oil-based polyurethane (PU)/ poly-(methacrylate-co-styrene) [P (MA-St)]. The effects of the ratio of PU to P (MA-St) copolymer on tensile strength (dry and wet states), vapor permeability, size stability, and water resistivity of the coated films were studied. The interfacial interaction between cellulose and the PU/P (MA-St) coating was analyzed using infrared (IR), ultraviolet (UV), scanning electron microscopy (SEM), transmission electron microscopy (TEM), differential thermal analysis (DTA), and electron probe microanalysis (EPMA). The results indicated that the mechanical properties and water resistivity of the coated films significantly enhanced, and the biodegradability was displayed, when the ratio of PU to P (MA-St) was 8∶2 by weight. The chemical bonds and hydrogen bonds between the cellulose, PU, and the copolymer exist in the coated films. It is regarded that PU/P (MA-St) semi-interpenetrating polymer networks (IPNs) were formed, and a shared network of PU with both the cellulose and the coating in the coated film occurred simultaneously resulting in a strong bonding between the coating layer and the film. Supported by the State Economy and Trade Commission of China Gong Ping: born in 1963, Ph. D candidate     

Interfacial interaction between polyurethane/poly (methacrylateco-styrene) coating and the regenerated cellulose film

Water-resistant films were prepared by coating the surface of regenerated cellulose films with castor oil-based polyurethane (PU)/ poly-(methacrylate-co-styrene) [P (MA-St)]. The effects of the ratio of PU to P (MA-St) copolymer on tensile strength (dry and wet states), vapor permeability, size stability, and water resistivity of the coated films were studied. The interfacial interaction between cellulose and the PU/P (MA-St) coating was analyzed using infrared (IR), ultraviolet (UV), scanning electron microscopy (SEM), transmission electron microscopy (TEM), differential thermal analysis (DTA), and electron probe microanalysis (EPMA). The results indicated that the mechanical properties and water resistivity of the coated films significantly enhanced, and the biodegradability was displayed, when the ratio of PU to P (MA-St) was 8∶2 by weight. The chemical bonds and hydrogen bonds between the cellulose, PU, and the copolymer exist in the coated films. It is regarded that PU/P (MA-St) semi-interpenetrating polymer networks (IPNs) were formed, and a shared network of PU with both the cellulose and the coating in the coated film occurred simultaneously resulting in a strong bonding between the coating layer and the film. Supported by the State Economy and Trade Commission of China Gong Ping: born in 1963, Ph. D candidate     

反应注射成型聚氨酯／乙烯基酯树脂互穿聚合物网络的形态及力学性能──添加工业接枝聚醚多元醇

将不同比例的聚环氧丙烷三元醇和工业生产的接枝聚环氧丙烷三元醇混合，与甲苯二异氰酸酯（ＴＤＩ）或碳二亚胺改性二苯基甲烷二异氰酸酯（Ｌ－ＭＤＩ）快速反应，合成了两类聚氨酯／乙烯基酯树脂互穿聚合物网络（ＩＰＮ）。用扫描电镜观察了它们的拉仲断面以及经ＤＳＣ的测定，结果表明，添加少量工业接枝聚醚多元醇，由ＴＤＩ合成的ＩＰＮ，其两个网络间的相容性有较显著的改善，显示出好的拉仲性能。然而，Ｌ－ＭＤＩ合成的ＩＰＮ，随工业接枝聚醚多元醇的加入，网络间的相容性变差，拉伸性能有所下降。     

Interference Alignment Algorithm for Considering the Throughput of Cognitive Users in Cognitive MIMO Network

The cognitive multiple input multiple output( MIMO)network can utilize radio spectrum efficiently and satisfy the demand of high data rate. In order to decrease the interference during transmission,a new interference alignment( IA) algorithm based on cognitive MIMO networks is proposed in this paper. The algorithm is realized by designing two-level pre-coding, the first-level precoding aligns the interference generated by the cognitive users( CUs) to unused sub-channels of the primary user( PU),thereby eliminating the interference of CUs to PU; the second-level precoding is used to improve the throughput of CUs. Simulation shows that the proposed IA algorithm can eliminate the interference that the CUs produce on the PU and improve the throughput of CUs spontaneously.     

水性聚氨酯的制备及其交联膜的性能研究

采用ＮａＨＳＯ３封端法制备了一系列的水性聚氨基甲酰磺酸钠（ＰＣＳ）,讨论了作为溶剂的水、乙酸乙酯、乙醇的用量对封端率的影响,结果表明３种溶剂的用量均有一最佳值,膜的吸水、吸乙醇及动力学实验表明经多乙烯多胺交联的ＰＣＳ膜具有良好的耐水、耐乙醇性能及力学性能。