【摘  要】利用两种光引发剂复配形成共引发体系，通过可见光自由基聚合法合成了一系列高透明度和高强度的粘接材料，并将其用于粘接有机玻璃片。通过红外、力学拉伸剪切测试、流变测试和差示扫描量热仪等手段对其粘接性能、热力学性能、固化时间以及固化程度等进行分析。研究结果表明：单一的光引发剂在可见光照射下不会发生聚合，而两种复配的光引发剂可以很大程度地提高在可见光区域的吸收效率；在可见光自由基聚合中加入可见光引发剂可以发生诱导分解现象，有效地缩短甲基丙烯酸甲酯的固化时间（从2~3 h减少到35 min）。相比于现在市场上的可见光固化胶粘剂，该可见光固化体系有着更短的固化时间，固化产物有着更高的玻璃化转变温度与更高的机械强度，拉伸试验结果显示出了优异的粘接性能。该可见光固化有机玻璃用胶粘剂为无色透明，可扩大其使用范围，同时增加可见光引发剂含量可大幅度降低其固化时间，而不会导致其热力学性能下降，有效实现高强度、快速粘接有机玻璃。

【关键词】可见光；自由基聚合；可见光引发剂；诱导分解

【摘  要】开展了废电木粉填充改性环氧树脂的研究。首先将废旧电木板粉碎球磨制备为废旧电木粉（SBP），然后用硅烷偶联剂（KH-550）对SBP进行表面处理，再将其作为功能填料添加到环氧树脂（EP），并对SBP/EP复合材料的结构和性能进行了研究。研究结果表明：使用KH-550改性可使SBP与EP的界面相容性更好，且当复合材料中w(KH550-SBP)=25%时，复合材料的力学性能最优，拉伸强度为59.2 MPa，弯曲强度为92.59 MPa，弯曲模量为3 029.7 MPa，冲击强度为13.19 kJ/m²，较纯环氧树脂有不同程度的提升；复合材料的热稳定性略有降低，但其热力学性能得到了有效的提高；SBP的加入提高了复合材料的残余质量，增强了复合材料的刚性，且玻璃化转变温度（T_g）得到提升，并使其有更好的耐热变形性能。

【关键词】废旧电木粉；环氧树脂；复合材料

【摘  要】以丁香酚和戊二酰氯为原料，设计并制备了具有自固化特性的生物质环氧树脂（EPEUGL）。对EPEUGL的自固化机理和固化特性、固化物C-EPEUGL的热性能、热机械性能、热稳定性能、介电性能和微观形貌结构进行了系统的研究。研究结果表明：EPEUGL中的环氧基团和活性酯基团之间有较高的选择性和反应活性，C-EPEUGL的玻璃化转变温度（T_gDMA）为94.6 ℃，C-EPEUGL的E’（25 ℃）为2 104 MPa；C-EPEUGL表现出优异的耐热性能，直至284.9 ℃没有明显的分解。此外，由于羟基参与交联反应，大幅度降低交联网络的极性，C-EPEUGL的介电常数（D_k）为3.10（1 GHz），明显低于传统的环氧-胺的体系，并且C-EPEUGL的断面表现出具有韧性断面特征的“锯齿”状。合成的自固化生物基环氧树脂的综合性能优异，包括高耐热性、高模量、良好的热稳定性和低的D_k，在电子通信等领域具有潜在的应用价值。

【关键词】丁香酚；环氧树脂；自固化；固化机理；优异的综合性能

【摘  要】为制备低温性能优异、可应用于冷链标签用途的热熔压敏胶，研究了配方体系材料的种类及含量对热熔压敏胶性能及低温性能的影响。研究结果表明：弹性体最好选择苯乙烯-异戊二烯-苯乙烯三嵌段共聚物（SIS）体系，且质量分数在35%~40%之间时，具有优异的低温性能及涂布应用性能；增塑剂可由环烷油与脂类增塑剂混合，总含量在25%~30%之间；增黏树脂比例在25%~35%之间较为合适。

【关键词】热熔压敏胶；低温性能；冷链标签；SIS

【摘  要】以甲基丙烯酸甲酯（MMA）、丙烯酸丁酯（BA）、甲基丙烯酸（MAA）、丙烯酸（AA）为单体，二叔戊基过氧化物（DTAP）为引发剂，合成了羟基丙烯酸分散体，配制了橄榄绿水性涂料。研究了MAA的添加量和中和度对分散体粒径和黏度的影响。研究结果表明：当m(MAA)∶m(AA)=3∶2，中和度为80%时，分散体各项性能较佳。以此分散体配制的橄榄绿水性涂料，涂膜性能达到标准要求。

【关键词】甲基丙烯酸；水性羟基丙烯酸分散体；耐水性能

【摘  要】聚焦双组分聚氨酯灌封胶的应用性能，研究了双组分灌封胶混合后黏度随时间变化曲线，施胶时间、温度、胶层厚度对粘接强度的影响以及NCO/OH比例对粘接强度、硬度、拉伸强度、断裂伸长率等性能的影响。研究结果表明：双组分聚氨酯灌封胶混合后黏度低，可操作时间适中，混合均匀后30 min内施胶，对6系铝具有优异的粘接性；双组分聚氨酯灌封胶对NCO/OH比例耐受性宽，在n(—NCO)∶n(—OH)=(8~13)∶10范围内，硬度、拉伸强度、剪切强度等随着异氰酸酯组分混合比例的增加而增加，导热系数随异氰酸酯组分混合比例的增加而降低。整体而言，新能源汽车电池包用双组分聚氨酯灌封胶具有高导热性、高粘接性和良好的操作性能，对改善电池热管理、提高电池系统总成性能具有重要作用。

【关键词】电池；导热；灌封胶；操作时间；混合比；粘接强度

【摘  要】选用低气味的甲基丙烯酸高级烷基酯单体和低气味、低挥发性的三乙醇胺（TEOA）作为促进剂，来降低丙烯酸酯结构胶的气味。通过调整加入甲基丙烯酸(MAA)、还原剂及促进剂等的质量分数来提高丙烯酸酯结构胶的固化速度，制备了一种低气味、快固化丙烯酸酯结构胶。重点考察了聚合主单体、MAA、多官能度功能单体、还原剂及引发剂对结构胶性能的影响。研究结果表明：当2-苯氧乙基甲基丙烯酸酯（PHEMA）和甲基丙烯酸甲酯（MMA）组合作为主单体，并且其质量比为1∶1时，制备的胶液具有气味低、固化速度快、剪切强度高的特点；MAA对丙烯酸酯结构胶的固化时间影响较大，确定MAA的加入量占总质量的分数为12.5%；加入占总质量的分数为4.0%的季戊四醇三丙烯酸酯（PETA），可以制得耐热性能优异的胶液；确定TEOA为固化还原剂，加入占总质量的分数为2.0%；加入异丙苯过氧化氢（CHP）占总质量的分数为4.0%时，制备的丙烯酸酯结构胶固化速度快、贮存稳定性优异。本研究制备的结构胶气味轻微，固化速度快（常温固化时间可达到200秒），耐温性能优异，120 ℃下的拉伸剪切强度可达到12.5 MPa。

【关键词】低气味；耐温性；快固化；丙烯酸酯结构胶

【摘  要】对不同厂家的3种硅酮密封胶样品于广东、吐鲁番两地的曝晒场进行曝晒老化试验，对其外观、粘接性、拉伸强度和伸长率等性能进行分析。通过热重分析仪（TG）、傅里叶变换红外光谱仪（FT-IR）、扫描电子显微镜（SEM）等对各种曝晒试样进行测试，对试样老化前后微观内部结构变化进行分析。研究结果表明：老化后的试样A、B的力学性仍然能保持较好，试样C的力学性能下降明显。通过TG法、FT-IR法不能明显地表征出老化前后硅酮密封胶试样物理力学性能的差异变化，而通过SEM表征方法可发现样品老化前后的微观结构变化，所以研究表明后续硅酮结构胶老化的微观结构研究可采用SEM表征方法。

【关键词】硅酮结构胶；自然曝晒；老化

【摘  要】以树脂和甲基丙烯酸羟丙酯为主要材料，添加气相二氧化硅，辅以促进剂、引发剂等助剂制备了厌氧胶。研究了不同种类和不同比例的树脂、两种引发剂同时使用和单独使用对厌氧胶性能的影响，也考察了厌氧胶的耐介质性，并研究了厌氧胶在不同基材的使用效果。研究结果表明：当树脂为环氧甲基丙烯酸酯树脂且质量分数为50%～60%，两种引发剂结合使用且m(异丙苯过氧化氢)∶m(无味DCP)=2∶1时，其制备的厌氧胶综合性能较佳。经过耐介质性测试，结果表明厌氧胶具有一定的耐水性和耐油性，且厌氧胶在铁制基材的使用效果较佳。

【关键词】厌氧胶；引发剂；树脂；耐介质性

【摘  要】通过对比几种泡沫芯材在风电叶片中应用进展，提出从不同方面来替代传统聚氯乙烯（PVC）泡沫的可能性。研究发现：聚对苯二甲酸乙二醇酯（PET）泡沫芯材由于其具有可循环利用、力学性能优异、耐高温、耐疲劳性能好以及价格较低等优势，可以在叶片壳体和腹板中替代PVC泡沫；聚苯乙烯（PS）泡沫材料具有优异的剪切应变特性，可用于叶片的剪切腹板；聚甲基丙烯酰亚胺（PMI）在确保性能前提下，可以通过共混、共聚等方式复合发泡，降低材料成本；聚氨酯（PU）泡沫具有一定的柔韧性，通过提升制造工艺性，特定的PU芯材可以在叶片的长度和宽度方向上改善其剪切性能。在未来的大兆瓦级叶片设计中，可以通过结合不同种类芯材的优势，有效减轻叶片重量，降低树脂和胶粘剂用量，避免泡沫因应力集中过大而被破坏，确保壳体的刚度满足性能要求。

【关键词】风电；泡沫芯材；压缩；剪切；破坏应变

【Abstract】A series of adhesive materials with high transparency and high strength were synthesized by visible light radical polymerization using two photoinitiators to form a co-initiator system, and they were used to bond plexiglass sheets. The bonding properties, thermomechanical properties, curing time, and curing degree were analyzed by means of infrared, mechanical tensile shear test, rheological test, and differential scanning calorimeter. The research results showed that a single photoinitiator did not polymerize under visible light irradiation, while two compounded photoinitiators could greatly improve the absorption efficiency in the visible light region. The addition of visible light initiator to visible light free radical polymerization could induce decomposition phenomenon and effectively reduced the curing time of methyl methacrylate (from 2-3 h to 35 min). Compared with the visible light curing adhesive on the market, the visible light curing system had shorter curing time, the cured product had higher glass transition temperature and higher mechanical strength, the tensile test results showed excellent bonding performance. The visible light curing adhesive for plexiglass was colorless and transparent, which could expand its scope of application, while increasing the visible light initiator content could significantly reduce its curing time without causing its thermomechanical properties to decline, effectively achieving high strength and fast bonding to plexiglass.

【Keywords】visible light; free radical polymerization; visible light initiator; induced decomposition

【Abstract】The modified epoxy resin filled with waste bakelite powder was studied in this paper. Firstly, waste bakelite plate was milled into waste bakelite powder (SBP), the surface of SBP was treated with silane coupling agent (KH-550), and then it was added to epoxy resin (EP) as a functional filler. The structure and properties of SBP/EP composite material were investigated. The research results showed that the modification with KH-550 resulted in better interfacial compatibility between SBP and EP. When w(KH550-SBP)=25% in composite material, the mechanical properties of composite material were optimal, the tensile strength was 59.2 MPa, the flexural strength was 92.59 MPa, the flexural modulus was 3,029.7 MPa, and the impact strength was 13.19 kJ/m², which were improved to some extents compared with pure epoxy resin. The thermal stability of composite material decreased slightly, but its thermodynamic properties were effectively improved. The addition of SBP improved the residual mass of composite material, enhanced the rigidity of composite material, and improved the glass transition temperature (T_g), making it have better thermal deformation resistance.

【Keywords】waste bakelite powder; epoxy resin; composite material

【Abstract】Biomass-based epoxy resin (EPEUGL) with self-curing properties was designed and prepared from eugenol and glutaryl chloride. The self-curing mechanism and curing characteristics of EPEUGL, the thermal properties, thermomechanical properties, thermal stability, dielectric properties, and microstructure morphology of cured product C-EPEUGL were systematically studied. The research results showed that there was high selectivity and reactivity between the epoxy group and active ester group in EPEUGL, the glass transition temperature (T_gDMA) of C-EPEUGL was 94.6 ℃ and the E' (25 ℃) of C-EPEUGL was 2 104 MPa. C-EPEUGL exhibited excellent heat resistance and did not decompose obviously until 284.9 ℃. In addition, due to the participation of hydroxyl groups in the crosslinking reaction, the polarity of crosslinked network was greatly reduced, and the dielectric constant (D_k) of C-EPEUGL was 3.10 (1 GHz), which was significantly lower than that of the conventional epoxy-amine system, and the cross-section of C-EPEUGL exhibited a "sawtooth" shape with the characteristics of a ductile cross-section. The synthesized self-curing bio-based epoxy resin had excellent comprehensive performance, including high heat resistance, high modulus, good thermal stability and low D_k, which had potential applications in the fields such as electronic communication.

【Keywords】eugenol; epoxy resin; self-curing; curing mechanism; excellent comprehensive performance

【Abstract】In order to prepare hot melt pressure sensitive adhesive with excellent low-temperature performance for cold-chain label application, the effects of the type and content of materials in formulation system on the performance and low-temperature properties of hot melt pressure sensitive adhesive were studied. The research results showed that the best elastomer was selected from styrene-isoprene-styrene triblock copolymer (SIS) system, when the mass fraction was between 35%-40%, it had excellent low-temperature performance and coating application performance. The plasticizer could be mixed by naphthenic oil and lipid plasticizer, with a total content of 25%-30%. The proportion of tackifying resin was between 25%-35%.

【Keywords】hot melt pressure sensitive adhesive; low temperature resistance; cold-chain label; SIS

【Abstract】Hydroxyacrylic acid dispersion was synthesized with methyl methacrylate (MMA), butyl acrylate (BA), methacrylic acid (MAA) and acrylic acid (AA) as monomers and di-tert-amyl peroxide (DTAP) as initiator, and olive green waterborne coatings were prepared. The effects of MAA addition and neutralization degree on the particle size and viscosity of dispersion were studied. The research results showed that when m(MAA)∶m(AA)=3∶2, and the neutralization degree was 80%, the dispersion had excellent performance. The olive green waterborne coatings prepared with this dispersion achieved the standard performance requirements of coating film.

【Keywords】methacrylic acid; aqueous hydroxyacrylic acid dispersion; water resistance

【Abstract】Focusing on the application performance of two-component polyurethane potting adhesive, the viscosity change with time after mixing of two-component potting adhesive, the effects of application time, temperature and thickness of adhesive layer on bonding strength as well as the effects of NCO/OH ratio on bonding strength, hardness, tensile strength, elongation at break and other properties were studied. The research results showed that the two-component polyurethane potting adhesive had low viscosity after mixing, moderate operation time, and excellent bonding properties to 6-series aluminum when applied within 30 min after uniform mixing. The two-component polyurethane potting adhesive had wide tolerance to NCO/OH ratio, and in the range of n(—NCO) ∶n(—OH)=(8-13)∶10, the hardness, tensile strength and shear strength increased with the increase of mixing ratio of isocyanate component, while the thermal conductivity decreased with the increase of mixing ratio of isocyanate component. On the whole, the two-component polyurethane potting adhesive for battery packs of new energy vehicle had high thermal conductivity, high bonding properties and good operation performance, which played an important role in improving battery thermal management and improving the performance of battery system assembly.

【Keywords】battery; thermal conductive; potting adhesive; operation time; mixing ratio; bonding strength

【Abstract】The low odor alkyl methacrylate monomer and low odor, low volatility triethanolamine (TEOA) as accelerator  were selected to reduce the odor of acrylate structural adhesive.By adjusting the mass fraction of methacrylic acid (MAA), reducing agent and accelerator to improve the curing speed of acrylate structural adhesive, a low odor, fast curing acrylate structural adhesive was prepared. The effects of main polymerization monomers, MAA, multifunctional monomers, reducing agents and initiators on the properties of structural adhesive were emphatically investigated. The research results showed that when 2-phenoxyethyl methacrylate (PHEMA) and methyl methacrylate (MMA) were combined as main monomers and their mass ratio was 1∶1, the prepared adhesive solution had low odor, fast curing speed and high shear strength. MAA had a large effect on the curing time of acrylate structural adhesive, and the addition amount of MAA was determined to be 12.5% in the total mass. By adding 4.0% pentaerythritol triacrylate (PETA) in the total mass, the adhesive solution with excellent heat resistance could be prepared. TEOA was determined as the curing reductant, and the addition amount in the total mass was 2.0%. When the content of cumene hydroperoxide (CHP) was 4.0% in the total mass, the acrylate structural adhesive prepared had fast curing speed and excellent storage stability. The structural adhesive prepared in this study had mild odor, fast curing speed (curing time at room temperature could reach 200 s), excellent temperature resistance, and tensile shear strength could reach 12.5 MPa at 120 ℃.

【Keywords】low odor; temperature resistance; fast curing; acrylate structural adhesive

【Abstract】The flame retardant two-component polyurethane sealant was prepared by synthesizing prepolymer with polyether polyol and diphenylmethane diisocyanate, then adding fillers and auxiliaries to make component A, and using 3,3'-dichloro-4,4'-diaminodiphenyl methane(MOCA) as curing agent, then adding fillers and auxiliaries to make component B. The effects of MOCA and different flame retardants on the performance of polyurethane sealant were studied. The research results showed that the sealant could be completely cured when the dosage of MOCA was 3 phr. The flame retardancy could reach HB grade when the dosage of decabromodiphenyl ethane was more than 12 phr. Antimony trioxide had poor flame retardant effect when it was used alone, but when it was compounded with decabromodiphenyl ethane, it improved the flame retardancy of decabromodiphenyl ethane, but excessive antimony trioxide had little effect on improving the flame retardancy of decabromodiphenyl ethane. With the increasing amount of triisopropylphenyl phosphate (IPPP), the tensile strength kept decreasing, the elongation at break kept increasing, and the flame retardant effect became better, which could reach HB grade when 20 phr were added and could reach V0 grade when 50 phr were added. With the increasing amount of modified magnesium hydroxide, the tensile strength kept increasing, the elongation at break kept decreasing, and the flame retardant effect became better, which could reach HB grade when 20 phr were added and could reach V0 grade when 40 phr were added.

【Keywords】polyurethane sealant; two-component; flame retardant

【Abstract】Three kinds of silicone sealant samples from different manufacturers were tested in the exposure fields of Guangdong and Turpan, and their appearance, bonding properties, tensile strength and elongation were analyzed. Various exposure samples were tested by thermogravimetric analyzer (TG), Fourier transform infrared spectrometer (FT-IR) and scanning electron microscope (SEM), and the microscopic internal structural changes of samples before and after aging were analyzed. The research results showed that after aging, the mechanical properties of sample A and sample B could still be maintained well, while the mechanical properties of sample C decreased significantly. The difference changes of physical and mechanical properties of silicone sealant samples before and after aging could not be obviously characterized by TG method and FT-IR method, while the microstructural changes of samples before and after aging could be found by SEM characterization method. Therefore, the study indicated that SEM characterization method could be used for the subsequent study of aging microstructure of silicone structural adhesive.

【Keywords】siliconestructural sealant; natural exposure; aging

【Abstract】Anaerobic adhesive was prepared by using resin and hydroxypropyl methacrylate as main materials, adding fumed silica, supplemented by accelerator, initiator and other additives. The effects of different types and proportions of resin, two initiators used at the same time and separately on the performance of anaerobic adhesive were studied, the medium resistance of anaerobic adhesive was also investigated, and the effects of using anaerobic adhesive on different substrates were studied. The research results showed that when the resin was epoxy methacrylate resin and the mass fraction was 50%-60%, two initiators were used together, and m(cumene hydroperoxide)∶m(tasteless DCP)=2∶1, the comprehensive performance of anaerobic adhesive prepared was relatively good. After the medium resistance test, the results showed that the anaerobic adhesive had certain water resistance and oil resistance, and the anaerobic adhesive was good in the use of iron substrate.

【Keywords】anaerobic adhesive; initiator; resin; medium resistance

【Abstract】By comparing the application progress of several foam core materials in wind turbine blade, the possibility of replacing traditional polyvinyl chloride (PVC) foam from different aspects was proposed. The research showed that polyethylene terephthalate (PET) foam core material could replace PVC foam in blade shell and web due to its advantages of recyclability, excellent mechanical properties, high temperature resistance, good fatigue resistance and lower price. Polystyrene (PS) foam material, with excellent shear strain characteristics, could be used in shear web of the blade. Polymethacrylimide (PMI) could be compounded and foamed by blending and copolymerization to reduce material cost under the premise of ensuring performance. Polyurethane (PU) foam had a certain flexibility, and by improving the manufacturing process, specific PU core material could improve its shear performance in the length and width direction of the blade. In the future design of large megawatt-class blade, the blade weight could be effectively reduced by combining the advantages of different kinds of core materials, reducing the amount of resin and adhesive, avoiding the destruction of the foam due to excessive stress concentration, and ensuring that the rigidity of shell met the performance requirements.

【Keywords】wind power; foam core material; compression; shear; failure strain