环己二甲酸/间苯型不饱合聚酯的合成及性能

以1,4-环己二甲酸(CHDA)和间苯二甲酸(PTA)作为不饱和酸组分,分别合成出环己二甲酸型(CH-DA-UP)和通用间苯二甲酸型(PTA-UP)不饱和聚酯(UP);分析比较了2种UP的合成工艺和合成物的FTIR谱图;考察了2种UP浇铸体的力学性能及其在Q-Sun Xenon Test Chamber老化箱中老化1 000 h的耐候性。结果表明:CHDA-UP的合成周期短(约为PTA-UP的0.65倍);CHDA-UP较PTA-UP更柔韧,综合性能好;虽然合成CHDA-UP所使用的是一种没有被完全氢化的CHDA,但是它的耐候性要比PTA-UP优越得多。     

光伏EVA封装胶膜交联体系的研究

主要研究了光伏组件用EVA封装胶膜的交联体系。通过对EVA封装胶膜硫化曲线的分析,研究了EVA胶膜中交联剂、助交联剂、硅烷偶联剂的含量对胶膜硫化曲线的影响,并推断出交联剂、助交联剂及硅烷偶联剂对EVA胶膜交联性能的影响。实验证明通过调整上述3个助剂的含量能够实现对EVA胶膜交联能力的控制。     

EVM橡胶过氧化物交联体系的研究

研究了交联剂过氧化二异丙苯(DCP)、双叔丁基过氧异丙基苯(BIPB)、2,5-二甲基-双(叔丁基过氧基)己烷(DBPMH)以及助交联剂三烯丙基异氰脲酸酯(TAIC)、三烯丙基氰脲酸酯(TAC)、N,N′-间苯撑双马来酰亚胺(HVA-2)对乙烯-醋酸乙烯酯橡胶(EVM)硫化特性、交联密度以及力学性能的影响。通过测试硫化曲线、力学性能和交联密度还研究了无机阻燃填料氢氧化镁的隔离效应对EVM橡胶交联效率的影响。结果表明,EVM橡胶最优过氧化物交联体系为BIPB和TAIC,其最佳配比为2.3/2.5,此时EVM橡胶有较好交联效率、交联速率和力学性能。氢氧化镁对EVM橡胶的交联效率没有影响,但硅烷化氢氧化镁能够提高EVM橡胶的表观交联密度。使用高交联效率过氧化物交联体系BIPB和TAIC,并添加硅烷化氢氧化镁,可平衡EVM橡胶阻燃性能和力学性能。     

（MMA／PMOE）共聚物交联改性研究

分别采用交联剂N,N′-亚甲基双丙烯酰胺(MBA)、二甲基丙烯酸乙二酯(EGDMA)对[甲基丙烯酸甲酯(MMA)/磷酸甲基丙烯酰氧乙基酯(PMOE)]共聚物进行改性,研究了改性材料的弯曲性能、维卡软化温度及吸水性。结果表明,(MMA/PMOE)共聚物经交联改性后材料的弯曲强度随着交联剂含量的增加而先提高后降低,维卡软化温度随着交联剂含量的增加而先升高后降低,以EGDMA为交联剂时材料的吸水率较低,EGDMA的加入并不影响(MMA/PMOE)共聚物作为特殊光学功能材料的应用。     

交联型丙烯酸酯压敏胶粘剂的合成研究

介绍了交联型丙烯酸酯压胶粘剂的合成,以及甲苯与醋酸乙酯的不同比例,交联剂和增粘树脂的加入量对压敏胶粘剂的性能影响。     

PVC的交联改性研究

采用不同交联剂（胺类和硫脲类），对聚合度为１３００的ＰＶＣ进行交联改性研究。结果表明：胺类的三乙烯四胺（ＴＥＴＡ）、四乙烯五胺（ＴＥＰＡ）和乙烯基硫脲（ＥＴＵ）均能较好地交联ＰＶＣ。     

交联型氟树脂与涂料性能关系的研究（Ⅱ）

3.4.2色漆的耐候性 　　采用2种不同的TiO2（A）和TiO2（B）,前者经表面化学处理（SiO2、Al2O3处理）,分别与TFE型FEVE和CTFE型FEVE配制涂料,用砂磨分散至细度不大于10μm,经SWM试验后光泽保持情况见图2.……     

交联推进剂粘结剂体系的确定

在大量实验及资料的基础上,讨论了粘结剂体系（包括粘结剂、交联剂、交联催化剂及键合剂等）对交联推进剂性能的影响,提出了选择交联推进剂粘结剂体系的一些基本原则,并介绍了粘结剂体系的一些新进展,供配方设计及合成工作者参考。     

1,4-环己烷二甲酸基环氧树脂的制备与表征

双酚A对人体的危害极大,故双酚A型EP(环氧树脂)的应用受到极大限制。以1,4-环己烷二甲酸和丁香酚为主要原料,制备了一种不含双酚A的新型EP,并采用1H-NMR(核磁共振氢谱)法对其结构进行了表征;然后以D230(聚醚胺)作为EP的固化剂,并采用TGA(热失重分析)法和TMA(线性热膨胀系数分析)法对EP固化物的热性能进行了表征。研究结果表明:该EP固化物的热稳定性优异,其在低于300℃时几乎无失重现象;该EP固化物受热后仍具有良好的形状保持率,其在105℃时的热变形量仅为1%。     

硼酸交联线性酚醛树脂的研究

研究了硼酸与六亚甲基四胺对线性酚醛树脂的交联反应。试验结果显示,当m酚醛树脂：m六亚甲基四胺=85：10：5时．经热压成型所得样品具有较好的力学性能;FT-IR分析显示,样品中已形成B-O-C键;TG分析表明,随着硼酸含量的增大．样品的失重率逐渐降低,大大提高了酚醛树脂的耐热性。     

Optimization of the preparation of a poly(aspartic acid) superabsorbent resin with response surface methodology

A poly(aspartic acid) superabsorbent resin was synthesized with polysuccinimide through chemical crosslinking with a crosslinking agent (diamine). The optimization of its preparation was investigated with response surface methodology. According to the Plackett–Burman design, the crosslinking temperature, drying temperature, and dissolving time of polysuccinimide had significant influences on the swelling ratio of the poly(aspartic acid) resin, which was the criterion for describing the water absorption capacity. Central composite design and response surface analysis were employed subsequently to further optimize the three aforementioned factors. A maximum swelling ratio greater than 500 g/g was attained; this was more than a 60% increase in comparison with previous results. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 2616–2622, 2006     

高力学性能医用聚氨酯手套的制备研究

利用水性聚氨酯乳液,采用浸渍成型工艺制备聚氨酯手套。考察了交联剂、TiO_2、温度等条件对聚氨酯薄膜力学性能的影响。结果表明:在不降低手套力学性能的前提下,可添加一定量的二氧化钛作为颜料,添加交联剂可以改善聚氨酯手套的力学性能,并达到行业要求。     

Crosslinking of atactic polypropylene by the system peroxide-pentaerythritol tetraallyl ether

The influence of the concentration of peroxide (mainly dicumyl peroxide) and pentaerythritol tetraallyl ether as coagent and the effect of temperature on the crosslinking of atactic polypropylene (a-PP) with molar mass 12 000g/mol were investigated. Using this system, crosslinking of 40mass% of a-PP at 160°C was obtained. The problems associated with the mechanism for crosslinking of a-PP are discussed.     

新型双马来酰亚胺树脂体系的性能研究

采用扩链改性法制备了由长链BMI-EK[4,4′-双(3-马来酰亚胺基苯氧基)二苯甲酮]、长链BMPP{2,2′-双[4-(4-马来酰亚胺基苯氧基)苯基]丙烷}、DABPA(二烯丙基双酚A)和BDM(N,N-4,4′-二苯甲烷双马来酰亚胺)组成的BMI-MIX(双马来酰亚胺混合体系),其中n(BDM)∶n(BMPP)∶n(BMI-EK)=2∶1∶1、n(混合BMI)∶n(DABPA)=1∶0.87。研究结果表明:BMPP、BMI-EK和BDM具有良好的固化匹配性;BMI-MIX的固化树脂具有优异的力学性能和良好的韧性,其冲击强度(21.87 k J/m2)、临界应力强度因子(KIC)和临界应变能释放率(GIC)比BDM/DABPA体系分别提高了101.7%、38.5%和73.2%,并且前者的玻璃化转变温度(Tg)可达到288℃,而且前者在低于270℃时仍保持良好的力学性能、在低于250℃时储能模量仍未降低。     

Effect of succinic acid on the shrinkage of unsaturated polyester resin

Succinic acid was presented as a small molecule low shrinkage additive (LSA) in unsaturated polyester resin (UPR). The effects of succinic acid on the volume shrinkage and the flexural strength of UPR cured at 80 ± 1°C were investigated and compared with those of macromolecule LSAs, including polyvinyl acetate (PVAc), polymethyl methacrylate (PMMA), and polystyrene (PS). The results indicated that the volume shrinkage of succinic acid/UPR specimen was significantly lower than those of specimens with macromolecule LSAs. The flexural strength of succinic acid/UPR specimen was improved. The optimal time of pre‐esterification between succinic acid and the excess dihydric alcohol in UPR was 3.0 h, and the optimal addition of succinic acid was 20 g per 100 g UPR. Compared with 2,2‐dimethyl malonic acid we put forward before, succinic acid was a cheaper and more commercial LSA, which obviously accelerated the pre‐esterification process and presented excellent antishrinkage effect. DSC showed that with the addition of succinic acid, the polymerization of UPR was distinctive. The two‐stage polymerization of UPR glue including the cross‐polymerization of UPR and the homopolymerization of polyester was changed to a one‐stage polymerization with lower exotherm and slower polymerization rate, which was optimal for UPR. FTIR and high resolution magic angle spinning nuclear magnetic resonance (HR/MAS NMR) were applied for the quantitative characterization of pre‐esterification caused by succinic acid. Succinic acid performed better effects on the polymerization of UPR as compared to previous LSAs, and finally the homogeneous micro‐structure of cured succinic acid/UPR formed and was demonstrated by SEM. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 41276.     

Preparation and evaluation of particleboard bonded with a soy flour-based adhesive with a new curing agent

Urea-formaldehyde (UF) resin is one of the most commonly used wood adhesives for making particleboards. However, UF emits carcinogenic formaldehyde and is derived from nonrenewable petrochemicals. In this study, a new formaldehyde-free wood adhesive that is based on soy flour and a renewable material-based curing agent (CA) were prepared and evaluated for the preparation of M-2 grade particleboards. The new CA was derived from ammonia and epichlorohydrin that can be derived from renewable glycerol. The composition of the adhesive was soy flour/sodium hydroxide/CA at a dry weight ratio of 9/0.3/1.0. The modulus of rupture, modulus of elasticity, and internal bond strength met the minimum industrial requirements of M-2 particleboards using the following variables: hot-press temperature of 190?°C, hot-press time of 240?s, the adhesive usage of the face particles of 12?wt.%, the adhesive usage of the core particles of 10?wt.%, and the target particleboard density of 0.80?g/cm³.     

新型黄原胶基高吸水性树脂的合成

在水溶性引发剂过硫酸钾的引发下,使丙烯酸（AA）在黄原胶（XG）分子链上接枝聚合,并加入N,N′-亚甲基双丙烯酰胺进行一定程度的交联,制备高吸水性树脂。研究了反应条件对产品吸水率的影响,利用傅里叶红外光谱、X射线衍射、偏光显微镜对接枝共聚物进行表征。实验结果表明：最佳合成条件AA与XG质量比m(AA) ∶m(XG)=6∶1,交联剂、引发剂与黄原胶的质量比分别为0.01和0.003,丙烯酸的中和度为70%,反应温度为60 ℃,反应时间为4 h。最佳合成条件下制备的树脂最大吸水倍数854 g/g,吸生理盐水倍数156 g/g。