熔融接枝

摘要： 采用同向平行双螺杆挤出机熔融挤出制备了聚氯乙烯接枝3-异丙基-α,α二甲基苄基异氰酸酯(PVC-g-TMI)共聚物,研究了引发剂DCP用量、单体TMI用量以及共单体St用量对接枝率的影响.FTIR分析表明,TMI成功接枝到PVC上.当DCP用量为0.45份时,产物接枝率达到最高.TMI用量越大,产物接枝率越高,但是存在一平衡值.第二单体St能够有效提高产物的接枝率,并且,当质量比为TMI∶ St=1∶1时,接枝率最高.通过正交实验得到3种因素对接枝率的影响程度为:DCP＞ St＞ TMI.熔融接枝的最佳工艺条件为:TMI为5份,DCP为0.45份,St为15份.TG和DSC测试结果表明,与纯PVC相比,PVC-g-TMI的外推起始失重温度、最大失重速率温度分别提高了3.5、3.9°C,玻璃化转变温度约提高了2°C,热分析表明PVC-g-TMI接枝物的热稳定性优于PVC.

摘要： 以聚丙烯(PP)为基体,γ-(甲基丙烯酰氧)丙基三甲氧基硅烷(KH570)为接枝单体,过氧化二异丙苯为引发剂,通过熔融接枝法制备了硅烷接枝PP (PP-g-Si)大分子相容剂,采用傅里叶变换红外光谱(FTIR)仪对PP-g-Si进行了表征,并从定性及定量分析两方面讨论了KH570在PP上的接枝效果,研究了挤出温度和螺杆转速对PP-g-Si接枝率的影响.结果表明,KH570以侧链的形式成功接枝到PP分子链上;挤出温度和螺杆转速对PP-g-Si接枝率的影响较为复杂,总体上高螺杆转速下PP-g-Si的接枝率较高,当螺杆转速为140 r/min时,挤出温度为170°C的接枝率最高,而其它螺杆转速下,挤出温度为180°C的接枝率最高;PP-g-Si的最优制备工艺条件为挤出温度180°C、螺杆转速120 r/min或挤出温度170°C、螺杆转速140 r/min.%Using polypropylene (PP) as matrix,γ-(methacryloyloxy) propyltrimethoxysilane (KH570) as grafting monomer and dicumyl peroxide as initiator,the silane grafted PP (PP-g-Si) macromolecular compatibilizer was prepared by melt grafting. The grafted product PP-g-Si was characterized by Fourier transform infrared spectroscopy (FTIR),the grafting effects of KH570 were discussed with qualitatively and quantitatively analysis,and the grafting rate of PP-g-Si was studied by controlling the screw rotat-ing speed and extrusion temperature. The results show that KH570 is successfully grafted onto PP molecular chain in the form of side chains. The influences of extrusion temperature and screw speed on the grafting rate of PP-g-Si are complicated. In general,the high grafting rate of PP-g-Si can be reached under high screw speed,the highest grafting rate is obtained under extrusion temperature of 170°C when the screw rotating speed is 140 r/min,while at other screw rotating speed,the highest grafting rate is obtained when the extrusion temperature is 180°C. The optimal preparation conditions of PP-g-Si show that extrusion temperature is 180°C,screw rotating speed is 120 r/min,or extrusion temperature is 170°C and screw rotating speed is 140 r/min.

摘要： 以助交联剂三烯丙基异氰尿酸酯(TAIC)或三聚氰酸三烯丙酯(TAC)作为聚丙烯(PP)熔融接枝马来酸酐(MAH)过程中的第二单体制备PP-g-MAH,与苯乙烯、丙烯酸、甲基丙烯酸甲酯等常用的第二单体进行了对比,对其反应机理进行了探讨;以TAIC为例,研究了其用量对PP-g-MAH接枝率、熔体流动速率(MFR)等性能的影响.结果表明,与苯乙烯等第二单体相比,以助交联剂TAIC或TAC为第二单体,制备的PP-g-MAH接枝率更高,MFR更低,且未产生刺激性气味;在MAH用量不变的条件下,当TAIC用量(占PP-g-MAH中PP质量的百分数)由0%增加至0.5%时,接枝率由0.36%增至0.85%,MFR由95.7 g/10 min降至38.2 g/10 min.将制备的PP-g-MAH应用于PP/玻璃纤维(GF)复合材料和PP/尼龙(PA)6合金中,结果表明,随TAIC用量增加,两种材料的力学性能整体提高, TAIC用量以0.5%为宜.在PP/GF/PP-g-MAH质量比为70/30/0.7或PP/PA6/PP-g-MAH质量比为20/70/10时,与未加TAIC的相比,PP/GF复合材料的冲击强度、弯曲强度和弯曲弹性模量分别提升了10.9%,20.8%和17.7%,PP/PA6合金的断裂伸长率、冲击强度、弯曲强度和弯曲弹性模量分别提升了42.9%,8%,12.9%和8.8%.%During the melt grafting of maleic anhydride (MAH) onto polypropylene (PP),the co-crosslinking agent triallyl isocyanurate (TAIC) or trimethylene cyanurate (TAC) were added as the second monomer for preparing PP-g-MAH,which were compared with the common second monomers such as styrene,acrylic acid and methyl methacrylate,and the reaction mechanism was discussed. Taking TAIC as an example,the effects of TAIC content on the grafting rate,melt flow rate (MFR) and other proper-ties of PP-g-MAH were studied. The results show that,compared with the second monomer such as styrene,the grafting rate of PP-g-MAH is higher,the MFR is lower,and no irritation odor is produced by using TAIC or TAC as the second monomer. The grafting rate increases from 0.36% to 0.85% when the TAIC content (the percentage of PP mass in PP-g-MAH) increases from 0% to 0.5% with constant content of MAH,the MFR decreases from 95.7 g/10 min to 38.2 g/10 min. The prepared PP-g-MAH was used in PP/glass fiber (GF) composite and PPylon (PA) 6 alloys. The results show that with the increase of TAIC content, the mechanical properties of both materials are improved as a whole,the TAIC content of 0.5% is appropriate. Compared with non-TAIC,when the mass ratio of PP/GF/PP-g-MAH is 70/30/0.7,the impact strength,flexural strength and flexural modulus of PP/GF compos-ites increase 10.9%,20.8% and 17.7% respectively,when the mass ratio of PP/PA6/PP-g-MAH is 20/70/10,the elongation at break,impact strength,flexural strength and flexural modulus of the alloy increase 42.9%,8%,12.9% and 8.8% respectively.

摘要： 分别采用熔融接枝法和共混法制备聚丙烯(PP)/苯乙烯(St)改性纤维(PP-g-St)和聚丙烯/聚苯乙烯(PS)改性纤维(PP/PS),研究了熔融接枝条件对St接枝率的影响,考察了PP纤维、PP/PS纤维和PP-g-St纤维对纯苯系物和水中乳化、溶解态苯系物的吸附性能,并探讨了再生后的重复吸附性能.实验结果表明:PP熔融接枝St的最优配比为w(St)=9％,w(过氧化二异丙苯)=0.5％,此时St接枝率为4.7％,且能顺利纺丝;相比于PP纤维,PP-g-St纤维和PP/PS纤维对纯苯系物和水中乳化、溶解态苯系物的吸附量显著提高;吸油饱和的PP-g-St纤维和PP/PS纤维通过离心法再生5次后吸附性能再生率仍能够分别达到82.0％和87.6％.

摘要： 采用熔融法制备乙烯-辛烯共聚物接枝甲基丙烯酸缩水甘油酯（POE-g-GMA）.利用红外光谱法和化学滴定法对接枝物进行结构表征及接枝率的测定.并将POE-g-GMA作为相容剂对PP/PA6共混物的力学性能的影响进行研究.研究结果表明：在PP/PA6共混物中加入适量的PA6可以提高PP的拉伸强度,当在PP/PA6共混体系中加入相容剂POE-g-GMA,不仅能够改善PP/PA6共混物的相容性,而且能够使PP/PA6共混物在保持较高拉伸强度和弹性模量的同时,大幅度地提高共混物的缺口冲击度和断裂伸长率,与纯PP相比提高幅度显著增大.

摘要： 采用熔融接枝法制备了马来酸酐和苯乙烯多单体熔融接枝无规共聚聚丙烯(MPP),动态流变测试表明无规共聚聚丙烯(PPR)在接枝过程中生成了长支链.以差示扫描量热法(DSC)和Avrami方程分析了PPR及MPP的等温结晶行为,考察了马来酸酐的相对接枝率对MPP等温结晶动力学的影响.结果表明,MPP的结晶速率明显大于PPR,MPP接枝率越高,结晶速率越大.PPR和MPP在较高温度下等温结晶时结晶过程受成核控制,长支链的存在可以促进MPP晶核的形成,从而加快结晶速率.偏光显微镜测试结果显示长链支化结构起到促进异相成核和细化晶粒的作用,随着接枝率的增大,MPP晶粒尺寸越小.%Maleic anhydride/styrene melt grafted random copolypropylene (MPP) was prepared by multi-monomer melt grafting. Investigation on dynamic rheological properties of MPP indicates the existence of long chain branched structure. Isothermal crystallization behavior of PPR (random copolypropylene) and MPP was measured using differential scanning calorimetry (DSC) and the kinetics of isothermal crystallization was analyzed with Avrami equation. Effects of relative grafting degree of maleic anhydride on the kinetics of isothermal crystallization of MPP were examined. The results show that MPP crystallization rate is higher than that of PPR, and it increases with the increase of grafting degree. The isothermal crystallization of PPR and MPP is controlled by nucleation rate at high temperature region. The long chain branched structure can promote nucleation formation of MPP, which results in the increase of crystallization rate. The results of polarized light microphotographs verify that the long chain branched structure can promote heterogeneous nucleation and decrease crystal size. The crystal size of MPP decreases with the increase of grafting degree.

摘要： The ethylene-propylene-diene terpolymer(EPDM) was melt grafting modificated with maleic anhydride (MAH) and triallyl isocyanurate (TAIC),and the effects of monomer amount and reaction temperature on the regularity of grafting reaction were investigated.The results showed that TAIC grafting reacted with EPDM macromolecule free radical firstly to form graft free radical,and then cografting reacted with TAIC or MAH,when dicumyl peroxide(DCP) was used as initiator.The grafting ratio (Rg) of MAH could be significantly increased by TAIC.The maximum of Rg of MAH reached and the gel content of the graft copolymer was low when the amount of TAIC,MAH and DCP were 0.8 phr,5 phr and 0.15 phr respectively,reaction temperature was 180 °C.%采用马来酸酐(MAH)和三烯丙基异氰脲酸酯(TAIC)对三元乙丙橡胶(EPDM)进行熔融接枝改性,考察了单体用量及反应温度等对接枝反应规律的影响.结果表明,采用过氧化二异丙苯(DCP)作引发剂,TAIC先与EPDM大分子自由基进行接枝反应形成接枝自由基,然后再与TAIC或MAH进行共接枝反应,TAIC能显著提高MAH的接枝率(Rg).当TAIC为0.8份、MAH为5份、DCP为0.15份、反应温度为180°C时,MAH的Rg达到最大值,接枝共聚物的凝胶含量较低.

摘要： 为降低聚乳酸的生产成本、拓宽其应用范围和高值化利用茶产业剩余物资源，以茶粉（tea dust, TD）为填料，聚乳酸（polylactic acid，PLA）为基体，经密炼、注塑工艺制备了环境友好型TD/PLA复合材料。以过氧化二异丙苯（dicumyl peroxide，DCP）为引发剂，通过熔融反应制备了甲基丙烯酸缩水甘油酯接枝聚乳酸（glycidyl methacrylate grafting PLA， GMA-g-PLA），用傅里叶红外光谱（Fourier transform infrared spectrum，FTIR）和核磁共振氢谱（H nuclear magnetic resonance，1H-NMR）对其进行了表征，并以GMA-g-PLA为增容剂，考察了其添加对TD/PLA复合材料力学性能、界面形态、热性能及吸水性能的影响。结果表明，FTIR和1H-NMR分析证实了GMA成功地接枝到了PLA上。GMA-g-PLA的添加明显改善了 TD 与 PLA 的界面相容性，提高了 TD/PLA 复合材料的力学性能和热稳定性，降低了吸水率。在GMA-g-PLA添加质量分数为10%时，复合材料的力学性能最佳，与未增容TD/PLA复合材料相比，其拉伸强度、弯曲强度及缺口冲击强度分别提高43.8%、42.1%和24.1%，拉伸模量和弯曲模量提高26.5%和10.4%，断裂伸长率提高26.1%。该研究结果可为进一步探索茶塑复合材料界面改性规律及制备聚乳酸基复合材料，提供试验数据和参考。%With the increasing scarcity of oil resources and the aggravation of white pollution, environmentally friendly biodegradable materials have become a topic of great interest in research and development. Among the biodegradable polymers, polylactic acid (PLA) is one of the most studied and promising aliphatic polyesters derived from starch by microbial fermentation, which offers excellent properties such as high strength, good transparency and biodegradability. However, PLA also has disadvantages of poor toughness and high cost. PLA is often reinforced with natural fibers like wood flour, bamboo flour, sisal, coir and hemp to reduce the production cost. Among the various natural fibers, tea fiber is cheap and widely available especially in China. The worldwide consumption of tea is about 4.5 million tons annually, and it always ends up with lots of waste tea leaves, stalks and dusts during the process of tea production and consumption. The tea residue to use as organic filler in polymer composites shows a great prospect because of its lignocelluloses behaviors and low cost. To our knowledge, there have been few researches about the biodegradable composites by using waste tea residue as organic filler so far. However, the moisture absorption tendency and poor interfacial bonding properties of the fibers are the main drawbacks of PLAatural fiber biomass composites. Many researches focused on surface modification of natural fibers through different methods such as mercerization, silane treatment and isocyanate treatment to improve the compatibility between natural fiber and PLA matrix. Melting grafting copolymerization is a novel modification technology for plastics, the use of PLA grafted with glycidyl methacrylate (GMA) is a relatively efficient strategy to improve both the interface adhesion and toughness of natural fiber/PLA biomass composites. In order to decrease the cost of PLA, and expand its applicability, and also to make full use of the waste tea residue, tea dust (TD) was blended with PLA to prepare environmental friendly TD/PLA composites by injection molding. PLA grafted with glycidyl methacrylate (GMA-g-PLA) was synthesized by melt grafting PLA with GMA using dicumyl peroxide as initiator, the graft copolymer was confirmed by FTIR (Fourier transform infrared spectrum) and 1H-NMR (H nuclear magnetic resonance), and the influences of GMA-g-PLA addition on the mechanical, thermal and moisture resistance properties of TD/PLA composite were investigated. GMA grafting onto PLA was confirmed by FTIR and11H-NMR spectroscopic technology. The phase morphology, thermal stability, moisture resistance and mechanical properties of TD/PLA composites compatibilized with GMA-g-PLA were improved compared with those of the composites without adding compatibilizer, as characterized by scanning electron microscopy, thermogravimetric analysis, water adsorption test and using a universal materials tester, respectively. The GMA was successfully grafted onto PLA, which was confirmed by the FTIR and1H-NMR technology, and the grafted GMA content was 4.88% calculated by1H-NMR analysis. The addition of GMA-g-PLA in the biocomposites obviously improved the mechanical, thermal and water adsorption properties of TD/PLA composites, which is attributed to the greater compatibility between TD and PLA matrix. The TD/PLA biomass composite with 10% (mass fraction) GMA-g-PLA showed the optimum mechanical properties, with an improvement of 43.8% in tensile strength, 42.1% in flexural strength, 24.1% in notched impact strength, 26.5% in tensile modulus, 10.4% in flexural modulus and 26.1% in elongation at break, respectively.

摘要： 通过过氧化二异丙苯(DCP)引发三官能单体三羟甲基丙烷三丙烯酸酯(TMPTA)对高密度聚乙烯(HDPE)进行熔融接枝改性,同时利用大分子自由基间的偶合反应制备出长支链聚乙烯(LCBPE)。转矩曲线和傅里叶变换红外光谱测试表明TMPTA成功接枝到HDPE,解释了熔融支化法制备LCBPE的机理。利用多种流变分析方法,如储能模量、损耗角、Cole-Cole图等方法有效区分了LCBPE和HDPE。采用差示扫描量热和X射线衍射分析技术,研究了引发剂用量对LCBPE结晶性能的影响,结果表明,长支链LCB结构的引入使HDPE的熔点、结晶度和起始结晶温度提高,晶体结构和晶型未发生变化,晶粒尺寸增大。利用热台偏光显微镜对HDPE和LCBPE晶体形态进行分析,发现LCBPE相比HDPE晶核增多,晶体生长速度降低。

摘要： 利用乙烯-丙烯酸无规共聚物与水滑石进行熔融接枝，然后与高密度聚乙烯共混挤出制备纳米复合材料。结果表明：乙烯-丙烯酸无规共聚物成功接枝在水滑石片层上，纳米复合材料的拉伸和冲击性能得到提高，冲击性能可提高25%以上，拉伸强度可提高35%以上； FTIR，WXRD，DSC与TEM等方法证实乙烯丙烯酸无规共聚物熔融接枝水滑石提高了水滑石在HDPE中的分散，有利于HDPE结晶，晶粒细化。

摘要： 聚烯烃的力学性能优良，成本低廉，且加工性能优异。但由于其是非极性聚合物，对其进行熔融接枝改性是使其极性化的重要手段之一，受到了广泛关注。对聚烯烃进行官能化的常用单体有马来酸酐(MAH)，甲基丙烯酸缩水甘油酯(GMA)等。在自由基引发的聚烯烃接枝反应中，常会发生交联或者断链的副反应，影响接枝效果。一种有效的减少副反应的方法是加入苯乙烯(St)等助单体。大量实验结果表明，St的加入可以减少副反应，提高接枝效率。但对于其作用机理的认识还有待深化。本文对St辅助GMA熔融接枝PE等的体系进行了研究。通过改变加料顺序、反应温度、反应时间等参数，探讨了反应的机理。

摘要： 本文采用双螺杆挤出机熔融接枝的方法,研究了多组分体系下不同单体熔融接枝聚丙烯(PP)的性能.结果表明:在共单体苯乙烯、引发剂和PP相同的条件下,接枝物的极性均较未接枝PP的极性增加,不同单体所得接枝物的接枝率不同.

摘要： 以甲基丙烯酸缩水甘油酯(GMA)为接枝单体,苯乙烯(St)为接枝共单体,在双螺杆挤出机上对线型低密度聚乙烯(LLDPE)进行熔融接枝,制备了LLDPE-g-(GMA-co-St).研究了引发剂用量、单体用量、共单体用量和抑交联剂亚磷酸三苯酯等对LLDPE接枝物接枝率和熔体质量流动速率的影响,利用红外光谱对接枝物进行了表征.研究表明,St的加入能有效提高GMA的接枝率,亚磷酸三苯酯有效抑制了LLDPE的交联.最佳配方为:过氧化二异丙苯(DCP)为0.15份,GMA为3份,St为3份,亚磷酸三苯酯为1份.

摘要： 本文探讨了在超临界二氧化碳存在下聚丙烯熔融接枝马来酸酐的反应挤出过程强化.由于具有较低的临界温度和压力以及在熔体中良好的溶胀性能,超临界二氧化碳在熔融接枝反应系统能够在有效降低反应挤出温度的同时强化传质,在减缓降解程度的同时提高反应程度.研究表明,反应挤出温度由通常的190°C可降至160°C,接枝产物的分子量下降较少且分布变窄.当马来酸酐和引发剂加入量较低时,超临界二氧化碳的加入使得接枝效率接近85%.通过单体和自由基在聚丙烯熔体中的笼子效应,我们解释了超临界流体对于熔融接枝体系的作用.同时,考察了在不同工艺条件,特别是改变喂料次序对于反应体系和产物特性的影响.

摘要： 本文采用化学交联模压法制备甲基丙烯酸缩水甘油酯/苯乙烯(GMA/St)熔融接枝天然橡胶(NR-g-(GMA-co-St))和聚氯乙烯(PVC)共混泡沫材料.研究了橡塑比、增塑剂邻苯二甲酸二辛酯(DOP)用量、发泡剂种类及用量对泡沫材料性能的影响以及泡沫材料的微孔结构.结果表明,当橡塑共混比为70/30、DOP和复合发泡剂的质量分数分别为30％和8％时,可制得密度较小,具有较好的综合力学性能的NR-g-(GMA-co-St)/PVC泡沫材料.NR/PVC泡沫材料的泡孔尺寸稳定性较差且以开孔为主,而NR-g-(GMA-co-St)/PVC泡沫材料以闭孔为主,且泡孔小、分布均匀.

摘要： 通过熔融接枝的方法制备了高分子型界面相容剂HDPE-g-MAH,并将其应用于HDPE/CaCO3填充体系,考查了HDPE-g-MAH对HDPE/CaCO3填充体系的增容效果和增容机理.结果显示,HDPE-g-MAH有效提高了HDPE/CaCO3两相组分的界面黏结,使复合材料的力学性能有明显的改善.

摘要： 目前广泛应用的抗静电技术,是在基体中添加小分子的抗静电剂,但抗静电剂容易流失,持久性较差.本文采用分子组装方法将合成的抗静电剂熔融接枝到聚丙烯分子链上,以赋予聚丙烯持久的抗静电性能.

摘要： 在无过氧化物引发剂的熔融状态下,利用剪切力将马来酸酐接枝于NR分子链上,并将制得马来酸酐接枝天然橡胶(MNR)作为偶联剂添加到纤维素纤维补强NR复合材料中并研究其对复合材料性能的影响。结果表明,在熔融状态下利用力化学作用将马来酸酐接枝于NR分子链上制得MNR,添加了MNR的纤维补强硫化胶力学性能尤其是定伸强度与未添加MNR的纤维补强硫化胶相比有了明显提高,应力松弛程度减小,添加了MNR的硫化胶的FESEM图中拔出纤维表面粗糙,拔出纤维所留孔洞剧烈变形,说明添加了MNR后填料与橡胶基体有了更强的相互作用力。

摘要： 在无过氧化物引发剂的熔融状态下,利用剪切力将马来酸酐接枝于NR分子链上,并将制得马来酸酐接枝天然橡胶(MNR)作为偶联剂添加到纤维素纤维补强NR复合材料中并研究其对复合材料性能的影响。结果表明,在熔融状态下利用力化学作用将马来酸酐接枝于NR分子链上制得MNR,添加了MNR的纤维补强硫化胶力学性能尤其是定伸强度与未添加MNR的纤维补强硫化胶相比有了明显提高,应力松弛程度减小,添加了MNR的硫化胶的FESEM图中拔出纤维表面粗糙,拔出纤维所留孔洞剧烈变形,说明添加了MNR后填料与橡胶基体有了更强的相互作用力。

摘要： 本发明公开了一种接枝反应装置，包括流延成膜设备，用于将预混料混合挤出并流延成聚合物膜；和接枝助剂分散预反应设备，用于将接枝助剂分散在聚合物膜上并与聚合物膜实现预接枝反应；和反应挤出接枝设备；用于将功能单体接枝到聚合物分子链上形成接枝聚合物。本发明所述的接枝反应装置通过将聚合物流延成膜，然后将接枝助剂溶解在分散剂中，以喷雾的形式喷在熔融的聚合物膜上，熔融的聚合物膜表面发生接枝预反应，然后在反应挤出接枝设备中使接枝反应完全进行，将微量的接枝助剂分散均匀，减少了物料在螺杆中不断剪切和界面更新过程中聚合物自由基活性点相互耦合几率，以减少交联副反应发生，得到接枝率高、晶点少、气味小的聚合物接枝物。

摘要： 本发明公开了一种接枝反应装置，包括流延成膜设备，用于将预混料混合挤出并流延成聚合物膜；和接枝助剂分散预反应设备，用于将接枝助剂分散在聚合物膜上并与聚合物膜实现预接枝反应；和反应挤出接枝设备；用于将功能单体接枝到聚合物分子链上形成接枝聚合物。本发明所述的接枝反应装置通过将聚合物流延成膜，然后将接枝助剂溶解在分散剂中，以喷雾的形式喷在熔融的聚合物膜上，熔融的聚合物膜表面发生接枝预反应，然后在反应挤出接枝设备中使接枝反应完全进行，将微量的接枝助剂分散均匀，减少了物料在螺杆中不断剪切和界面更新过程中聚合物自由基活性点相互耦合几率，以减少交联副反应发生，得到接枝率高、晶点少、气味小的聚合物接枝物。

摘要： 本实用新型涉及熔融法硅烷接枝改性聚丙烯提纯、抽滤及干燥一体设备，包括底板，所述底板的顶部固定安装有三个支撑板，三个所述支撑板的顶部固定安装有承重板，所述承重板的顶部固定安装有两个固定板，所述承重板的顶部活动安装有反应釜，所述反应釜的内部活动安装有转筒，所述转筒的内部固定安装有搅拌机构，所述反应釜的顶部规定安装有进料管。该熔融法硅烷接枝改性聚丙烯提纯、抽滤及干燥一体设备，通过设置搅拌机构使设备在运转的时候，可以充分进行搅拌，将引发剂和抗氧剂和产物充分混合，提高产物提炼的纯度，从而使后续的提纯解阶段提取的产物纯度更高，达到提升硅烷接枝改性聚丙烯纯度的效果。

摘要： 本发明涉及一种SEBS/PP合金熔融接枝马来酸酐接枝共聚物及其制备方法，按质量份数，所述接枝共聚物的原料为：SEBS，聚丙烯PP，马来酸酐单体，苯乙烯单体，引发剂，稀释剂，润滑剂。制备：原料按份数混合，搅拌共混，然后加入挤出机中，混合物经熔融塑化、混炼、挤出、水环切粒、冷却、脱水、鼓风干燥，即得。本发明采用双螺杆挤出机作为熔融接枝共聚反应容器，生产效率高，可连续化生产，与其它工艺路线相比，具有环保、高效、低成本特点。

摘要： 本发明涉及一种SEBS/PP合金熔融接枝马来酸酐接枝共聚物及其制备方法，按质量份数，所述接枝共聚物的原料为：SEBS，聚丙烯PP，马来酸酐单体，苯乙烯单体，引发剂，稀释剂，润滑剂。制备：原料按份数混合，搅拌共混，然后加入挤出机中，混合物经熔融塑化、混炼、挤出、水环切粒、冷却、脱水、鼓风干燥，即得。本发明采用双螺杆挤出机作为熔融接枝共聚反应容器，生产效率高，可连续化生产，与其它工艺路线相比，具有环保、高效、低成本特点。

摘要： 本发明提供一种提高GMA熔融接枝LLDPE接枝率的方法，包括以下步骤：将第二单体、引发剂、LLDPE先混合，再混入GMA，再经双螺杆挤出机熔融混炼、挤出、冷却、造粒加工而成。本发明中第二单体提高接枝率是因为首先接枝到LLDPE基体大分子链上，起到了稳定大分子自由基的作用，解决了传统接枝方法接枝率低的问题，还在很大程度上保留了基体的原有机械性能。

摘要： 本发明公开了一种双组分熔融接枝法制备聚丙烯接枝物的方法，以重量份数计，将聚丙烯40～100份，聚酰胺20-50份，增容剂1～30份，抗氧剂0.1～5份和润滑剂0.1～3份放入高速混合器中，调节转速为50-60r/min，温度为180-200°C，混合3-5min；然后将混合好的混合物放入双螺杆挤出机挤出，造粒，挤出温度为170-210°C。本发明通过对PP进行接枝改性，提高PP与其他聚合物的相容性，并改变PP由于大分子非极性带来的种种缺陷，使其染色性、粘接性、抗静电性以及机械性能等得到改善。本发明可得到刚性和韧性俱佳，喷涂性能优良的材料。

摘要： 本发明适用于塑料改性技术领域，提供了一种马来酸酐熔融接枝氯化聚乙烯/聚丙烯复合弹性体材料，包括如下重量份数的原料：氯化聚乙烯60～80份，聚丙烯20～40份，稳定剂10～15份，润滑剂0.7～1.2份，抗氧剂0.3～1.0份，增塑剂3～8份，马来酸酐2～5份，引发剂0.3～1.0份，交联抑制剂0.3～1.0份，接枝助剂0.1～0.6份；其中，氯化聚乙烯的含氯量为20～35％，熔融焓为2.0～5.0J/g，邵氏硬度≥75，门尼粘度(ML125°C(1+4))90～110。本发明还提供一种马来酸酐熔融接枝氯化聚乙烯/聚丙烯复合弹性体材料的制备方法。借此，本发明能够使马来酸酐熔融接枝氯化聚乙烯/聚丙烯复合弹性体材料具有优异的力学性能、热稳定性和加工性能，并且具有较高的阻燃性和光泽度，制得的标准样综合性能优良，力学强度较好，能够满足使用要求，经济价值更高。

摘要： 本实用新型公开了一种聚丙烯熔融接枝改性用反应装置，包括单螺杆挤出机，单螺杆挤出机包括安装板，安装板一侧的外侧壁上固定安装有驱动电机，驱动电机的输出端固定安装有螺旋杆，且螺旋杆的一端贯穿安装板并延伸至安装板的外侧，安装板上拆卸安装有挤出管，挤出管包括相互配合的第一半管和第二半管，第一半管和第二半管靠近安装板一端的顶壁上均安装有进料斗。本实用新型中挤出管由拆卸连接在螺旋杆外侧的第一半管和第二半管组成，将第一半管和第二半管从螺旋杆的外侧拆下后就可以方便的对螺旋杆和挤出管进行清洗，从而能避免原料残留而对下一次加工的原料造成污染，设计合理，实用效果好。