Study on the Preparation of Solvent Hot-Melt Adhesive Used for Polyethylene

热熔胶相比于其他胶黏剂优点突出，应用广泛。而随着各种新型产业的发展，尤其是热转印行业，对热熔胶品种需求扩大，溶剂型热熔胶应运而生，其中聚乙烯（PE）作为应用最为广泛的难粘通用塑料，其许多制品对溶剂型热熔胶存在需求。但目前我国对溶剂型热熔胶的研发投入少，产品多依赖进口，价格偏高，且依然存在对PE粘接针对性不足，粘接强度较低等问题。本文以乙烯-丙烯酸乙酯共聚物（EEA）为主体材料，对其进行物理和化学改性，致力于研制出对PE具有较高粘接强度的溶剂型热熔胶黏剂配方。 首先，本文对EEA、乙烯-醋酸乙烯酯共聚物（EVA）、乙烯-丙烯酸甲酯共聚物（EMA）、乙烯-丙烯酸共聚物（EAA）、马来酸酐改性聚乙...Since the advantages of hot-melt adhesives(HMAs) are obvious compared with other adhesives, they have been widely applied. With the development of new industries, especially heat transfer printing industry, the market demand for varieties of HMAs increases rapidly, so solvent HMAs are created. And polyethylene(PE) as the extensively used general-purpose plastics with poor adhesion, many products ...学位：理学硕士院系专业：材料学院_高分子化学与物理学号：2072013115005

Studies on Curing Shrinkage of Liquid Optical Clear Adhesive

紫外光固化的液态光学胶固化过程中出现的体积收缩现象,严重影响其黏接强度和产品外观.系统研究了液态光学胶预聚物的种类、活性稀释剂的种类和用量、光引发剂的用量、光固化的类型等诸多因素对固化收缩率的影响.研究发现,以聚乙二醇二丙烯酸酯作为预聚物可明显降低固化收缩率.当添加的活性稀释剂官能度相同时,胶黏剂的固化收缩率随活性稀释剂相对分子质量的增加而减小;当活性稀释剂相对分子质量相近时,官能度增加,固化收缩率随之增大.而光引发剂的用量则对固化收缩率无明显影响.阳离子型胶黏剂的固化收缩率比自由基型的小,但硬度和黏接强度较低;而混杂型的固化收缩率则介于二者之间.The volume shrinkage during UV-curing of liquid optical clear adhesives(LOCA)had a serious effect on the adhesive strength and appearance of the product.In this paper,the effect of different factors,including types of active diluents,amounts of active diluents and photo-initiators,and UV-curing types,on the volume shrinkage for LOCA was systematically investigated.Based on the experiment,polyethylene glycol diacrylate as the prepolymer could significantly reduce the shrinkage.With the same functionality of the added active diluents,the shrinkage decreased when the molecular weights of the active diluents increased.When the molecular weights of active diluents were similar,the shrinkage increased with the increase of the functionality.The amount of photo-initiators had no significant effect on shrinkage.The shrinkage of cationic adhesives was smaller than that of radical adhesives,but the hardness and adhesion strength were relatively lower.The shrinkage of hybrid adhesives was in between in general

Synthesis of Ternary Polymer for ABS Coating Resin

用自由基溶液聚合法合成了苯乙烯-甲基丙烯酸丁酯-甲基丙烯酸甲酯三元共聚产物,作为AbS塑料专用涂料树脂.通过分子设计,选择单体种类,改变引发剂用量、反应时间、苯乙烯加料方式等条件,得出一系列共聚产物.用红外光谱仪、核磁共振波谱仪对分子结构进行表征,用凝胶渗透色谱仪进行相对分子质量的测定.通过核磁谱峰积分计算各单体的转化率,跟踪其在反应过程中的变化,分析共聚产物的链段组成均一性.最终合成耐热性较高,数均相对分子质量在2.5万~4万,单体总转化率在95%以上,且链段组成分布均匀的共聚产物.将其用于AbS转印涂料,附着性好,耐热性优良,满足工业需求.In this paper,styrene-butyl methacrylate-methyl methacrylate ternary polymer,which is used as ABS plastic coating resin,was synthesized with the radical solution polymerization.Through molecular design,a series of copolymers were obtained by choosing monomer species,changing initiator amount,reaction time and styrene feeding method.Molecular structure was characterized by infrared(IR)spectrometer and nuclear magnetic resonance(NMR)spectrometer.Molecular weight was determined using gel permeation chromatograph(GPC).The conversion of the monomer was calculated according to the NMR peak integral.Changes of the conversion were tracked during the reaction,and the segment composition uniformity of the copolymer product had been analyzed.Finally,agood heat-resisting ternary polymer product had been synthesized,of which the number-average molecular weight ranged from2.5×104 to 4.0×104.The overall conversion ratio of monomers reached over 95%,and the segment composition of the product was uniformly distributed.When applied as an ABS transfer coating,the product showed good adhesion,excellent heat resistance,and satisfied the industrial demand

Study on the Synthesis of Epoxy Polybutadiene Acrylate and UV Curing Shrinkage

针对紫外光固化胶黏剂固化收缩率较大的问题,合成了一种具有双重固化机理的预聚物——环氧聚丁二烯丙烯酸酯.通过控制变量,得到制备该预聚物的较为理想的合成条件.利用fT-Ir,1H-nMr对预聚物进行了表征,并测定了使用该预聚物的紫外光固化体系的固化收缩率.研究结果表明:在预聚物合成中,反应时间7H,丙烯酸质量分数在5%~20%时为宜;预聚物的环氧值为3.430%时固化效果较好;三苯基膦是较为理想的催化剂;预聚物、乙氧基乙氧基乙基丙烯酸酯(EOEOEA)和正丁基缩水甘油醚(bgE)质量比为60∶10∶25时,固化收缩率可达2.59%.In view of the large curing shrinkage of UV-curing system,a type of prepolymer that has dual curing mechanism,epoxy polybutadiene acrylate,was synthesized.An ideal synthesis condition was achieved by controlling variables.The prepolymer was characterized by FT-IR and 1H-NMR,and the curing shrinkage of this UV-curing system was also studied.The results showed that in the synthesis of prepolymer reaction time was about 7hand the dosage of acrylic acid was 5%-20%(by mass).When the exopy value of the prepolymer was 3.430%,the curing result was better.Triphenylphosphine was an ideal catalyst.In the UV curing when the mass ratio of prepolymer,2-(2-ethoxyethoxy)ethyl acrylate(EOEOEA),and butyl glycidyl ether(BGE),was 60∶10∶25,the curing shrinkage came to 2.59%

Study on Activity Persistance of Polyester Polymercaptan Curing Agent

对比了聚醚型聚硫醇和2种聚酯型聚硫醇的活性寿命的差异.通过红外光谱、1 H-nMr和凝胶时间的测试表征聚硫醇的活性寿命.结果表明,以叔胺为促进剂时,以β-巯基丙酸为原料制备得到的聚酯型聚硫醇P(SH)6和聚醚型聚硫醇P(SH)3固化剂都有良好的活性寿命;而以α-巯基乙酸为原料制备得到的聚酯型聚硫醇P(SH)4固化剂存在活性下降的问题,2个月后完全失活.通过红外光谱、1 H-nMr表征活性下降前后其基团的变化提出了可能导致其活性下降的机理及解决的方法.The lifetime differences of polyether polymercaptans and two kinds of polyester polymercaptans were compared in this paper.The lifetime of polymercaptans curing agents was characterized by FT-IR,1 H-NMR and gelation time.The results revealed that polyester polymercaptans P(SH)6and polyether polymercaptans P(SH)3composed of 3-mercaptopropionic acid showed a long lifetime when using trialkylamine as accelerator,while polyester polymercaptans P(SH)4composed of 2-mercaptopropionic acid showed a decrease in curing activity and deactivated within two months.Possible mechanism of the decrease in curing activity was proposed based on the investigation of group changes during the deactivation by FT-IR and 1 H-NMR

Research on the Treatment of Highly Concentrated Phenolic Wastewater

采用fEnTOn系列方法处理高浓度酚醛废水,考察了各方法对化学需氧量(COd)去除率的影响.首先,确定了fEnTOn-uV氧化中H2O2溶液添加量、fE2+与H2O2摩尔比、PH值、光照时间等因素的较优水平;同时结果表明,将fEnTOn氧化法与超声和紫外光照射联用显著改善了处理效果,COd去除率可以达到90%以上;将絮凝法与fEnTOn-uV联用,聚丙烯酰胺加速絮状物沉淀,COd去除率达到70%左右;用红外和核磁手段表征酚醛废水经fEnTOn-uV氧化后的产物,证明fEnTOn-uV氧化法通过苯环侧链氧化断裂的主要途径进行.Several Fenton-related experiments were used to treat highly concentrated phenolic wastewater.Firstly,the optimal level of each factor in the Fenton-ultraviolet light experiment,such as the amount of H2O2,the mole ratio of Fe2+to H2O2,pH value and UV exposure time,was determined.The treatment effect obviously got improved when Fenton treatment was combined with ultrasonication and ultraviolet light irradiation,in which the removal efficiency of chemical oxygen demand(COD)could reach more than90%.In treating the phenolic wastewater by both flocculation and Fenton-UV,polyacrylamide could accelerate the sedimentary rate of the floccules and the COD removal efficiency was around 70%.Characterization of the flocculate emerging in the Fenton-UV oxidation using FT-IR and 1H-NMR methods proved that oxidation and degradation of the benzene ring′s side chains were the main way of Fenton-UV treatment