CN1254503C - Modified small bulk polypropylene composition and its preparing method - Google Patents
Modified small bulk polypropylene composition and its preparing method Download PDFInfo
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- CN1254503C CN1254503C CN 200410012571 CN200410012571A CN1254503C CN 1254503 C CN1254503 C CN 1254503C CN 200410012571 CN200410012571 CN 200410012571 CN 200410012571 A CN200410012571 A CN 200410012571A CN 1254503 C CN1254503 C CN 1254503C
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 56
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 56
- -1 polypropylene Polymers 0.000 title claims abstract description 54
- 239000000203 mixture Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title description 4
- 239000002105 nanoparticle Substances 0.000 claims abstract description 39
- 239000007822 coupling agent Substances 0.000 claims abstract description 26
- 239000013078 crystal Substances 0.000 claims abstract description 21
- 238000002360 preparation method Methods 0.000 claims abstract description 18
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 17
- 239000000314 lubricant Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 239000002667 nucleating agent Substances 0.000 claims abstract description 7
- 230000003078 antioxidant effect Effects 0.000 claims description 15
- 239000003484 crystal nucleating agent Substances 0.000 claims description 15
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical group [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 5
- 239000008116 calcium stearate Substances 0.000 claims description 5
- 235000013539 calcium stearate Nutrition 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 2
- 230000009471 action Effects 0.000 claims description 2
- 230000004913 activation Effects 0.000 claims description 2
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 claims description 2
- 150000004645 aluminates Chemical class 0.000 claims description 2
- 150000008430 aromatic amides Chemical group 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 abstract description 9
- 238000012986 modification Methods 0.000 abstract description 7
- 230000004048 modification Effects 0.000 abstract description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract 1
- 239000006096 absorbing agent Substances 0.000 abstract 1
- 238000005452 bending Methods 0.000 abstract 1
- 239000000460 chlorine Substances 0.000 abstract 1
- 229910052801 chlorine Inorganic materials 0.000 abstract 1
- 230000001939 inductive effect Effects 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- WLJVNTCWHIRURA-UHFFFAOYSA-N pimelic acid Chemical compound OC(=O)CCCCCC(O)=O WLJVNTCWHIRURA-UHFFFAOYSA-N 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- LNKJESSHRFPVPE-UHFFFAOYSA-N 5-(diethylamino)pentyl 3,4,5-trimethoxybenzoate;hydrochloride Chemical compound Cl.CCN(CC)CCCCCOC(=O)C1=CC(OC)=C(OC)C(OC)=C1 LNKJESSHRFPVPE-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000001341 alkaline earth metal compounds Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000010094 polymer processing Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
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Abstract
一种改性小本体聚丙烯组合物及其制备方法涉及一种改性小本体聚丙烯组合物及其制备方法，属于聚合物改性的技术领域，其特征是该组合物中含有诱导形成β晶体的成核剂、无机纳米粒子、偶联剂、抗氧剂、润滑剂和氯吸收剂。其制备方法是将纳米粒子经干燥、超声波分散后，用偶联剂进行活化处理，处理后的纳米粒子与小本体聚丙烯、β成核剂、抗氧剂、润滑剂和氯吸收剂进行初混，在双螺杆挤出机中进行熔融共混挤出造粒，制得改性小本体聚丙烯组合物，其冲击强度和弯曲强度得到较大的提高。A modified small-bulk polypropylene composition and its preparation method relate to a modified small-bulk polypropylene composition and its preparation method, which belong to the technical field of polymer modification, and are characterized in that the composition contains an inductive form of β Nucleating agents for crystals, inorganic nanoparticles, coupling agents, antioxidants, lubricants and chlorine absorbers. The preparation method is to dry and ultrasonically disperse the nanoparticles, and then activate them with a coupling agent. Blending, melt blending, extruding and granulating in a twin-screw extruder to obtain a modified small bulk polypropylene composition, the impact strength and bending strength of which are greatly improved.
Description
一、技术领域1. Technical field
本发明改性小本体聚丙烯组合物及其制备方法，属于聚合物改性的技术领域，具体而言涉及一种改性小本体聚丙烯组合物及其制备方法。The invention discloses a modified small bulk polypropylene composition and a preparation method thereof, belonging to the technical field of polymer modification, and in particular relates to a modified small bulk polypropylene composition and a preparation method thereof.
二、背景技术2. Background technology
聚丙烯(PP)是由丙烯单体聚合而成的热塑性树脂属五大通用塑料之一，由于其来源丰富价格低廉，合成工艺简单，加之物理综合性能好，而成为通用塑料中增加最快的品种。然而由于它也存在着许多不足之处，产品脆性大，特别是低温抗冲击性不好，热稳定性小，耐气候性差，高温刚性不足等，使其应用受到一定的限制。因此，对聚丙烯进行改性已成为近年来一个重要的研究方向。Polypropylene (PP) is a thermoplastic resin polymerized from propylene monomer, which is one of the five general-purpose plastics. Due to its abundant sources, low price, simple synthesis process, and good physical comprehensive properties, it has become the fastest-growing variety of general-purpose plastics . However, because it also has many shortcomings, such as high brittleness, especially poor low-temperature impact resistance, low thermal stability, poor weather resistance, and insufficient high-temperature rigidity, etc., its application is limited to a certain extent. Therefore, the modification of polypropylene has become an important research direction in recent years.
聚丙烯是一种结晶性聚合物，其性能的好坏与其结晶结构有着密切的关系。Polypropylene is a crystalline polymer, and its performance is closely related to its crystalline structure.
等规聚丙烯的晶体形态有α、β、γ、δ和拟六方态五种，其中以α和β晶型较为常见。α晶型是单斜晶系所形成的最普通和最稳定的形式，商品化聚丙烯中主要含有α晶型。β晶型属六方晶系，与α晶型聚丙烯相比，β晶型聚丙烯易于拉伸，具有较低的热变形温度，特别是具有较高的韧性。添加β晶型成核剂是目前公认的得到高含量β晶型聚丙烯的最有效途径之一。由于β晶型聚丙烯具有独特的增韧效果，因而研究者日众。专利CN85100465用β结晶改性聚丙烯可以使其抗冲强度提高近两倍，但却使扬氏模量由原来的10.7×10-3kg/cm降低到8.6×10-3kg/cm，抗张强度由原来的358kg/cm2降低到276kg/cm2。A.L.贝森等发明的(申请号CN98117531.7)用亚氨酸的钙盐作为β晶型成核剂改性聚丙烯，所得组合物，却贝冲击强度由8.06kJ/m2升高到11.7kJ/m2(23℃)和1.41升高到7.03(-20℃)，但挠曲模量由1006MPa降低到901MPa。由此可见，β结晶虽然可以增加聚丙烯的韧性，但对保持或增加其强度效果不够理想。There are five crystal forms of isotactic polypropylene: α, β, γ, δ and pseudo-hexagonal, among which α and β crystal forms are more common. The α crystal form is the most common and stable form formed by the monoclinic crystal system, and commercial polypropylene mainly contains the α crystal form. The β crystal form belongs to the hexagonal crystal system. Compared with the α crystal form polypropylene, the β crystal form polypropylene is easy to stretch, has a lower heat distortion temperature, and especially has higher toughness. Adding β-crystal nucleating agent is currently recognized as one of the most effective ways to obtain high-content β-crystal polypropylene. Due to the unique toughening effect of β-crystalline polypropylene, there are more and more researchers. The patent CN85100465 modified polypropylene with β crystals can increase its impact strength by nearly two times, but it reduces Young's modulus from the original 10.7×10 -3 kg/cm to 8.6×10 -3 kg/cm. Tensile strength decreased from 358kg/cm 2 to 276kg/cm 2 . Invented by AL Bessen et al. (application number CN98117531.7), the calcium salt of imidic acid was used as a β crystal nucleating agent to modify polypropylene, and the Charpy impact strength of the resulting composition increased from 8.06kJ/ m2 to 11.7 kJ/m 2 (23°C) and 1.41 increased to 7.03 (-20°C), but the flexural modulus decreased from 1006MPa to 901MPa. It can be seen that although β crystallization can increase the toughness of polypropylene, it is not ideal for maintaining or increasing its strength.
无机纳米粒子由于具有诸多优点，近年来受到广泛的关注。采用纳米微粒填充改性聚合物是形成高性能高分子复合材料的重要手段。通常认为，优化这种复合材料性能的关键在于实现纳米微粒在聚合物中的超细微分散，因此目前的研究主要利用特殊的制备方法(如插层聚合和溶液共混等)，以改善纳米微粒在聚合物基体内的分散，但这些分散方法均不能将纳米微粒象普通添料那样在聚合物加工中广泛应用。Inorganic nanoparticles have received extensive attention in recent years due to their many advantages. The use of nanoparticles to fill modified polymers is an important means to form high-performance polymer composites. It is generally believed that the key to optimizing the performance of this composite material lies in the ultrafine dispersion of nanoparticles in the polymer, so current research mainly uses special preparation methods (such as intercalation polymerization and solution blending, etc.) to improve the performance of nanoparticles. Dispersion in the polymer matrix, but none of these dispersion methods can make nanoparticles widely used in polymer processing like ordinary additives.
利用常规的熔融共混加工方法将纳米微粒直接添加到聚合物中，受动力学因素的控制，只有极少量的纳米微粒可能在较高粘度的树脂基体中形成初级微粒水平分散，大部分纳米微粒仍将以团聚体形式存在，这些团聚体的结构较为松散，在材料受力时容易产生应力集中而率先破坏，裂纹扩展阻力不大。因此，纳米改性的关键是提高纳米粒子在聚合物中的分散和相容性能。在现有技术中，主要通过对纳米粒子的表面改性如用偶联剂处理、表面接枝、添加接枝聚合物相容剂等手段。如专利(申请专利号为00112644.X)所述对纳米粒子采用偶联剂如钛酸酯或硅烷处理；专利(CN1362441A)所述，对纳米硅酸盐或无机纳米粒子采用表面电子束辐照、用胺类化合物进行接枝改性；专利(CN1308099A)公布了采用马来酸酐、丙烯酸酯或丙烯酸接枝聚丙烯作为相容剂，并且用偶联剂处理纳米CaCO3。The nanoparticles are directly added to the polymer using the conventional melt blending processing method. Controlled by kinetic factors, only a very small amount of nanoparticles may form primary particle horizontal dispersion in the higher viscosity resin matrix, and most of the nanoparticles It will still exist in the form of agglomerates. The structure of these agglomerates is relatively loose. When the material is stressed, it is easy to generate stress concentration and be the first to be destroyed, and the crack propagation resistance is not large. Therefore, the key to nano-modification is to improve the dispersion and compatibility of nanoparticles in polymers. In the prior art, surface modification of nanoparticles, such as treatment with coupling agent, surface grafting, addition of grafted polymer compatibilizer, etc., is mainly carried out. As described in the patent (application patent number is 00112644.X), the nanoparticles are treated with a coupling agent such as titanate or silane; as described in the patent (CN1362441A), the nano-silicate or inorganic nanoparticles are irradiated with surface electron beams 1. Graft modification with amine compounds; patent (CN1308099A) discloses the use of maleic anhydride, acrylate or acrylic acid grafted polypropylene as a compatibilizer, and nano CaCO 3 is treated with a coupling agent.
三、发明内容3. Contents of the invention
本发明改性小本体聚丙烯组合物及其制备方法目的在于，采用结晶改性剂β晶型成核剂改变聚丙烯结晶结构的同时，采用纳米粒子填充的方法来弥补β结晶改性带来的增强效果不够理想的不足，从而公开一种改性小本体聚丙烯组合物及其制备方法。The purpose of the modified small bulk polypropylene composition and the preparation method thereof of the present invention is to use the crystal modifier β crystal form nucleating agent to change the crystal structure of polypropylene, and at the same time to use the method of filling nanoparticles to make up for the β crystal modification. The reinforcing effect of the invention is not ideal enough, so a modified small bulk polypropylene composition and a preparation method thereof are disclosed.
本发明改性小本体聚丙烯组合物，其特征是在小本体聚丙烯组合物中，含有β晶型成核剂、无机纳米粒子、偶联剂、抗氧剂、润滑剂的改性小本体聚丙烯组合物，其各组分含量(按质量份数比)为：小本体聚丙烯(PP)粉100份；无机纳米粒子1～10份；偶联剂为纳米粒子重量的0.5～2％、β晶型成核剂0.1～1份；主抗氧剂0.1～0.5份；辅抗氧剂0.1～0.5份；润滑剂0.1～1份。The modified small body polypropylene composition of the present invention is characterized in that in the small body polypropylene composition, the modified small body contains a β crystal nucleating agent, an inorganic nano particle, a coupling agent, an antioxidant, and a lubricant The polypropylene composition, the content of each component (by mass fraction ratio) is: 100 parts of small bulk polypropylene (PP) powder; 1-10 parts of inorganic nanoparticles; and the coupling agent is 0.5-2% of the weight of the nanoparticles , 0.1-1 part of β crystal nucleating agent; 0.1-0.5 part of primary antioxidant; 0.1-0.5 part of secondary antioxidant; 0.1-1 part of lubricant.
上述的一种改性小本体聚丙烯组合物的制备方法，其特征是将无机纳米粒子干燥、超声波分散后，用偶联剂进行活化处理，处理后的纳米粒子与小本体聚丙烯、β晶型成核剂、无机纳米粒子、偶联剂、抗氧剂、润滑剂进行初混，然后在双螺杆挤出机中进行熔融共混挤出造粒，制得改性小本体聚丙烯组合物，所使用的β晶型成核剂可以是单组分β晶型成核剂也可以是含组分A和组分B的双组分β晶型成核剂，所使用的无机纳米粒子是小于100nm的CaCO3或SiO2的一种或两种的混合物，所使用的偶联剂是钛酸酯类、铝酸酯或硅烷类偶联剂或铝钛复合偶联剂，所使用的抗氧剂是B215和168，润滑剂为硬酯酸钙，所用各组分及其配比(按质量分数比)为：小本体聚丙烯(PP)粉100份；无机纳米粒子1～10份；偶联剂为无机纳米粒子重量的0.5～2％、β晶型成核剂0.1～1份；主抗氧剂0.1～0.5份；辅抗氧剂0.1～0.5份；润滑剂0.1～1份。The preparation method of the above-mentioned modified small-body polypropylene composition is characterized in that after the inorganic nanoparticles are dried and ultrasonically dispersed, activation treatment is performed with a coupling agent, and the treated nanoparticles are combined with small-body polypropylene and β crystals. Type nucleating agent, inorganic nanoparticles, coupling agent, antioxidant, lubricant for initial mixing, and then carry out melt blending extrusion granulation in a twin-screw extruder to obtain a modified small bulk polypropylene composition , the β crystal nucleating agent used can be a single-component β crystal nucleating agent or a two-component β crystal nucleating agent containing component A and component B, and the inorganic nanoparticles used are One or two mixtures of CaCO 3 or SiO 2 less than 100nm, the coupling agent used is titanate, aluminate or silane coupling agent or aluminum-titanium composite coupling agent, the anti- The oxygen agent is B215 and 168, and the lubricant is calcium stearate. The components used and their proportions (by mass fraction ratio) are: 100 parts of small bulk polypropylene (PP) powder; 1 to 10 parts of inorganic nanoparticles; The coupling agent is 0.5-2% of the weight of the inorganic nanoparticles, 0.1-1 part of the beta crystal nucleating agent, 0.1-0.5 part of the main antioxidant, 0.1-0.5 part of the auxiliary antioxidant and 0.1-1 part of the lubricant.
上述一种改性小本体聚丙烯组合物的制备方法，其特征是所述的单组分β晶型成核剂是芳酰胺类如TMB-5；双组分β晶型成核剂中，组分A是有机二元酸或其盐，其中有机二元酸是庚二酸，或其它脂肪族二元酸；组分B是碱土金属化合物：氢氧化钙或氧化钙。The preparation method of the above-mentioned modified small bulk polypropylene composition is characterized in that the single-component β crystal form nucleating agent is an aromatic amide such as TMB-5; in the two-component β crystal form nucleating agent, Component A is an organic dibasic acid or its salt, wherein the organic dibasic acid is pimelic acid or other aliphatic dibasic acid; component B is an alkaline earth metal compound: calcium hydroxide or calcium oxide.
上述一种改性小本体聚丙烯组合物的制备方法，其特征是无机纳米粒子首先在100～140℃下干燥1～4hr，然后在超声波作用下分散5～20min。The preparation method of the above-mentioned modified small bulk polypropylene composition is characterized in that the inorganic nanoparticles are first dried at 100-140° C. for 1-4 hours, and then dispersed under the action of ultrasonic waves for 5-20 minutes.
上述一种改性小本体聚丙烯组合物的制备方法，其特征是用将超声波分散了的无机纳米粒子在60～120℃下在捏合机中与偶联剂进行活化。The preparation method of the above-mentioned modified small-bulk polypropylene composition is characterized in that the ultrasonically dispersed inorganic nanoparticles are activated with a coupling agent in a kneader at 60-120°C.
上述一种改性小本体聚丙烯组合物的制备方法，其特征是经偶联剂活化处理的无机纳米粒子与小本体聚丙烯、β晶型成核剂、抗氧剂、润滑剂进行初混，其初混在高速混合机或在捏合机中进行，双螺杆共混熔融挤出造粒的温度在170～240℃下进行。The preparation method of the above-mentioned modified small bulk polypropylene composition is characterized in that the inorganic nanoparticles activated by the coupling agent are initially mixed with small bulk polypropylene, a β crystal nucleating agent, an antioxidant, and a lubricant The initial mixing is carried out in a high-speed mixer or in a kneader, and the temperature of twin-screw blending, melt extrusion and granulation is carried out at 170-240°C.
四、具体实施方式4. Specific implementation
实施方式一Implementation Mode 1
将40g纳米碳酸钙在100℃干燥2hr后，用超声波分散15min；在捏合机中与4g偶联剂在60℃下捏合15min；与1.0kg小本体聚丙烯、3g抗氧剂B215，2g抗氧剂168和5g硬酯酸钙在高速混合机中混合10min，在同向双螺杆挤出机中熔融挤出造粒，温度为170～240℃，得改性小本体聚丙烯组合物。After drying 40g of nano-calcium carbonate at 100°C for 2hrs, disperse with ultrasonic waves for 15min; knead with 4g of coupling agent in a kneader at 60°C for 15min; mix with 1.0kg of small bulk polypropylene, 3g of antioxidant B215, 2g of Mix 168 and 5 g of calcium stearate in a high-speed mixer for 10 minutes, melt and extrude and pelletize in a co-rotating twin-screw extruder at a temperature of 170 to 240° C. to obtain a modified small bulk polypropylene composition.
实施方式二Implementation mode two
将20g纳米碳酸钙在120℃干燥2hr后，用超声波分散15min；在捏合机中与4g偶联剂在80℃下捏合15min；与1.0kg小本体聚丙烯、3gβ晶型成核剂、3g抗氧剂B215，2g抗氧剂168和5g硬酯酸钙在高速混合机中混合10hr，有同向双螺杆挤出机中进行反应挤出、造粒，温度为170～240℃。得改性小本体聚丙烯组合物。After drying 20g of nano-calcium carbonate at 120°C for 2hr, disperse it with ultrasonic waves for 15min; knead with 4g of coupling agent in a kneader at 80°C for 15min; Oxygen agent B215, 2g antioxidant 168 and 5g calcium stearate were mixed in a high-speed mixer for 10 hours, and then reacted and extruded and granulated in a co-rotating twin-screw extruder at a temperature of 170-240°C. A modified small bulk polypropylene composition is obtained.
实施方式三Implementation Mode Three
将40g纳米碳酸钙在140℃干燥2hr后，用超声波分散15min；在捏合机中与4g偶联剂在120℃下捏合15min；与1.0kg小本体聚丙烯、3gβ晶型成核剂、3g抗氧剂B215，2g抗氧剂168、5g硬酯酸钙在高速混合机中混合10hr，在同向双螺杆挤出机中进行反应挤出、造粒，温度为170～240℃。得改性小本体聚丙烯组合物。After drying 40g of nano-calcium carbonate at 140°C for 2hr, disperse it with ultrasonic waves for 15min; knead with 4g of coupling agent in a kneader at 120°C for 15min; Oxygen agent B215, 2g antioxidant 168, and 5g calcium stearate were mixed in a high-speed mixer for 10 hours, and reacted and extruded and granulated in a co-rotating twin-screw extruder at a temperature of 170-240°C. A modified small bulk polypropylene composition is obtained.
表1 改性小本体聚丙烯组合物力学性能 Table 1 Mechanical Properties of Modified Small Bulk Polypropylene Compositions
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