WO2020108206A1 - 一种聚丙烯复合材料及其制备方法 - Google Patents

一种聚丙烯复合材料及其制备方法 Download PDF

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WO2020108206A1
WO2020108206A1 PCT/CN2019/113864 CN2019113864W WO2020108206A1 WO 2020108206 A1 WO2020108206 A1 WO 2020108206A1 CN 2019113864 W CN2019113864 W CN 2019113864W WO 2020108206 A1 WO2020108206 A1 WO 2020108206A1
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composite material
polypropylene composite
polypropylene
material according
fiber
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French (fr)
Inventor
陈业中
俞飞
吴国峰
杨波
罗忠富
丁正亚
钱志军
李伟
陈嘉杰
李振华
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Kingfa Science and Technology Co Ltd
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Kingfa Science and Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/06—Polymer mixtures characterised by other features having improved processability or containing aids for moulding methods
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils

Definitions

  • the invention relates to a polypropylene composite material and a preparation method thereof, which belong to the field of polymer material modification.
  • the purpose of the present invention is to overcome the shortcomings of the prior art and provide a low-density, low-temperature explosion polypropylene composite material and a preparation method thereof.
  • the technical solution adopted by the present invention is: a polypropylene composite material including the following parts by weight of components: polypropylene 57.8-79.35 parts, fiber wool 0.25-1.0 parts, toughening agent 20-40 parts .
  • the invention adds a large amount of toughening agent, so that the column made of the polypropylene composite material of the invention can meet the low temperature blasting requirement of -35°C; and, the polypropylene composite material of the invention does not add any filler, and its density can be controlled at 0.91 g/cm 3 or less, to achieve real low density and light weight.
  • the polypropylene is a block copolymer polypropylene, and the melt index of the polypropylene is 25-60g/10min.
  • the melt index of the polypropylene is measured according to ASTM D1238 using a weight of 2.16kg and a temperature of 230°C .
  • the fiber wool is a plant fiber
  • the toughening agent is at least one of ethylene-propylene copolymer, ethylene-butene copolymer, and ethylene-octene copolymer.
  • the research shows that the polypropylene composite material made of plant fiber is especially good for the imitation flocking of the molding column.
  • the plant fiber is at least one of bamboo fiber, bark fiber, straw fiber, and leaf fiber. More preferably, the plant fiber is bamboo fiber, straw fiber or leaf fiber.
  • the color of the plant fiber is dark. Plant fibers need to be dyed before they can be used. More preferably, the color of the plant fiber is black, dark gray, dark brown, or the like.
  • the average length of the plant fiber is 0.1-0.8 mm.
  • the maximum heat-resistant temperature of the plant fiber is 220-260°C.
  • the toughener is an ethylene-octene random copolymer, and the Mooney viscosity of the toughener is 2 to 45 MU.
  • the test standard for the Mooney viscosity of the toughener is ASTM D1646, and the test conditions are: the test temperature is 121° C., the large rotor, the preheating is 1 minute, and the test is 4 minutes.
  • the polypropylene composite material further includes an auxiliary agent.
  • additives may be further added.
  • different additives have different effects on the properties of polypropylene composites.
  • plasticizers can make polypropylene composites more flexible, and antioxidants can improve the oxidation resistance of polypropylene composites.
  • a person skilled in the art can select a suitable auxiliary agent according to the specific properties of the polypropylene composite material required in the actual process.
  • the auxiliary agent is at least one of a lubricant, a light stabilizer, and an antioxidant.
  • the lubricant is at least one of amide lubricants and stearate lubricants;
  • the light stabilizer is a hindered amine light stabilizer;
  • the antioxidant is at least one of hindered phenol antioxidants and phosphite antioxidants. More preferably, the antioxidant is at least one of antioxidant 1010, antioxidant 1076, antioxidant 3114, antioxidant 168, antioxidant RCPEP 36;
  • the light stabilizer is light stabilizer At least one of UV-3808PP5, light stabilizer LA-402XP, and light stabilizer LA-402AF.
  • the lubricant is 0.1 to 0.3 parts by weight
  • the light stabilizer is 0.1 to 0.3 parts by weight
  • the antioxidant is 0.2 to 0.6 parts by weight.
  • the invention also provides a preparation method of the polypropylene composite material, which includes the following steps:
  • step (2) Add the premix obtained in step (1) to a twin-screw extruder for melt extrusion and granulation to obtain the polypropylene composite material.
  • the rotation speed of the high-speed mixer is 200 to 300 rpm, and the components in the polypropylene composite material are in the high-speed mixer
  • the mixing time is 3 to 5 minutes
  • the twin-screw extruder includes 10 independent temperature control zones, and the temperature from the feeding section to each zone of the machine head is 170°C, 200°C, 200 in order °C, 210 °C, 210 °C, 205 °C, 205 °C, 205 °C, 200 °C, 200 °C.
  • the beneficial effects of the present invention are: the present invention adds a large amount of toughening agents, so that the column made of the polypropylene composite material of the present invention can meet the low temperature blasting requirements of -35 °C, and meet the safety performance; and,
  • the inventive polypropylene composite material does not add any filler, and its density can be controlled below 0.91g/cm 3 to achieve real low density and light weight.
  • the polypropylene composite material of the present invention can be used to prepare uprights.
  • the method for preparing the uprights is as follows: the components in the polypropylene composite material are extruded and granulated by a twin-screw extruder to obtain a polypropylene composite material; Propylene composite material, to get the column.
  • the column obtained according to this method can meet the performance requirements of the column, and the preparation method is lower in cost and higher in efficiency than the current method of preparing the column by wrapping flannel.
  • melt index of polypropylene is measured according to ASTM D1238 using a weight of 2.16 kg and a temperature of 230°C; the test standard for the Mooney viscosity of the toughener is: ASTM D1646, and the test conditions are: the test temperature is 121 °C, big rotor, preheat for 1 minute, test for 4 minutes (ie ML1+4@121°C).
  • composition components of the polypropylene composite materials of Examples 1 to 5 and Comparative Examples 1 to 2 are shown in Table 1.
  • the preparation methods of the polypropylene composite materials of Examples 1 to 5 and Comparative Examples 1 to 2 are:
  • step (2) Add the premix obtained in step (1) to a twin-screw extruder for melt extrusion, granulation, drying, cooling, and packaging to obtain the polypropylene composite material; the twin-screw extruder Including 10 independent temperature control zones, the temperature from the feeding section to each zone of the machine head is 170°C, 200°C, 200°C, 210°C, 210°C, 205°C, 205°C, 205°C, 200°C, 200°C .
  • polypropylene BX3900 was purchased from SK Korea, and polypropylene AZ191 was purchased from Singapore TPC.
  • Ethylene-octene copolymer (POE) was purchased from Dow Chemical.
  • Antioxidant 1010 is a hindered phenolic antioxidant.
  • Antioxidant 168 is a phosphite antioxidant. Both antioxidant 1010 and antioxidant 168 were purchased from Angel Synthetic Chemistry of Yixing City.
  • the light stabilizer UV-3808PP5 was purchased from Solvay, Belgium.
  • the model of the amide lubricant is TR451, purchased from the United States STRUKTOL; the model of the stearate lubricant is BS-2818, purchased from Huamingtai Chemical.
  • the applicant further tested the properties of the polypropylene composites of Examples 1 to 5 and Comparative Examples 1 to 2 above.
  • the specific test methods are as follows: density is tested according to ISO 1183-1, tensile strength and elongation at break are tested according to ISO 527-2 (tensile speed is 50 mm/min), and flexural strength and flexural modulus are measured according to ISO 178 Test (bending speed is 2mm/min), cantilever beam notch impact is tested according to ISO 180, melt index is tested according to ISO 1133-1/2 (230°C, 2.16kg), and heat distortion temperature is according to ISO 75-1/2 ( 0.45MPa, lying flat) for testing, the total energy and failure form of multi-axis impact at low temperature (-35°C) are tested according to ISO 6603-2 (3mm thickness, 4.4m/s speed).
  • the polypropylene composite of the present invention has a lower density, and on the basis of the balance of rigidity and toughness indexes, the low-temperature (-35°C) multiaxial toughness is better, and can meet the -35°C low-temperature blasting requirements.
  • Example 1 has high energy, YD is the best state, and the rigidity and toughness are relatively balanced.
  • Comparative Example 2 also has better multi-axis performance, its rigidity such as tensile strength, bending strength, and bending modulus are lower, which is not suitable for the practical application of the column.
  • the polypropylene composite material includes the following parts by weight: polypropylene 57.8-79.35 parts, fiber wool 0.25-1.0 parts, toughening agent 20-40 parts, lubricant 0.1-0.3 parts, light stabilizer 0.1- 0.3 parts, antioxidant 0.2-0.6 parts;
  • the polypropylene is block copolymer polypropylene, the melt index of polypropylene is 25 ⁇ 60g/10min, the melt index of polypropylene is 2.16kg weight according to ASTM D1238 and 230 °C temperature measurement; the color of the fiber wool is dark, the average length is 0.1 ⁇ 0.8mm, the maximum heat resistance temperature is 220 ⁇ 260 °C;
  • the toughener is ethylene-propylene copolymer, ethylene-butene copolymerization At least one of an ethylene-octene copolymer;
  • the lubricant is at least one of an amide lubricant and a stearate lubricant;
  • the light stabilizer
  • the preparation method of the polypropylene composite material is as follows: (1) Weigh the components in the polypropylene composite material according to the ratio, add to the high-speed mixer and mix evenly to obtain a premix; (2) Step (1) The obtained premix is added to a twin-screw extruder for melt extrusion and granulation to obtain the polypropylene composite material.
  • the column is obtained by injection molding polypropylene composite material.
  • bamboo fiber, straw fiber and leaf fiber have a better effect.
  • the polypropylene composite material obtained has obvious effect of imitation flocking for the column, and the bark fiber has medium flocking effect. It can be seen that the polypropylene composite material containing plant fibers can be used to prepare automobile pillars; non-plant fibers such as glass fiber, carbon fiber and hemp fiber have no flocking effect.
  • the choice of color, length and maximum heat resistance temperature of the fiber wool will affect the imitation flocking effect of the post made of polypropylene composite material.
  • this effect example uses fiber wool of different colors, lengths and maximum heat resistance temperature to make a polypropylene composite material, and use this polypropylene The composite materials were used to prepare uprights respectively, and the imitation flocking effects of the obtained uprights were compared.
  • the polypropylene composite material includes components in the following parts by weight: polypropylene 57.8-79.35 parts, fiber wool 0.25-1.0 parts, toughening agent 20-40 parts, lubricant 0.1-0.3 parts, light stabilizer 0.1- 0.3 parts, antioxidant 0.2-0.6 parts;
  • the polypropylene is block copolymer polypropylene, the melt index of polypropylene is 25 ⁇ 60g/10min, the melt index of polypropylene is 2.16kg weight according to ASTM D1238 and 230 °C temperature measurement;
  • the fiber wool is at least one of bamboo fiber, bark fiber, straw fiber, leaf fiber;
  • the toughening agent is ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-octene At least one of olefin copolymers;
  • the lubricant is at least one of amide lubricants and stearate lubricants;
  • the light stabilizer is a hindered amine light stabilizer
  • the preparation method of the polypropylene composite material and the upright column is the same as the effect example 1.
  • the plant fiber is black/dark, with an average length of 0.1-0.8mm and a maximum heat-resistant temperature of 220-260°C.
  • the imitation value cashmere has the best appearance.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Laminated Bodies (AREA)

Abstract

本发明涉及一种聚丙烯复合材料及其制备方法，属于高分子材料改性领域。本发明的聚丙烯复合材料包括下述重量份的组分：聚丙烯57.8～79.35份，纤维毛0.25～1.0份，增韧剂20～40份。本发明添加了大量增韧剂，使得由本发明聚丙烯复合材料制得的立柱可以满足-35℃低温爆破要求，满足安全性能；并且，本发明的聚丙烯复合材料不添加任何填料，它的密度可以控制在0.91g/cm 3以下，做到真正意义上的低密度轻量化。

Description

一种聚丙烯复合材料及其制备方法 技术领域
本发明涉及一种聚丙烯复合材料及其制备方法，属于高分子材料改性领域。
背景技术
随着社会的发展，人们对汽车的要求越来越高。近些年，来汽车轻量化和成本最优化的主题也不断引起各大汽车塑料改性厂的关注。
发明内容
本发明的目的在于克服现有技术的不足之处而提供一种低密度、低温爆破的聚丙烯复合材料及其制备方法。
为实现上述目的，本发明采取的技术方案为：一种聚丙烯复合材料，包括下述重量份的组分：聚丙烯57.8～79.35份，纤维毛0.25～1.0份，增韧剂20～40份。
本发明添加了大量增韧剂，使得由本发明聚丙烯复合材料制得的立柱可以满足-35℃低温爆破要求；并且，本发明的聚丙烯复合材料不添加任何填料，它的密度可以控制在0.91g/cm 3以下，做到真正意义上的低密度轻量化。
作为本发明所述聚丙烯复合材料的优选实施方式，如下(a)～(c)中的至少一项：
(a)所述聚丙烯为嵌段共聚聚丙烯，所述聚丙烯的熔融指数为25～60g/10min，所述聚丙烯的熔融指数是根据ASTM D1238使用2.16kg重量并在230℃的温度测量。
(b)所述纤维毛为植物纤维；
(c)所述增韧剂为乙烯-丙烯共聚物、乙烯-丁烯共聚物、乙烯-辛烯共聚物中的至少一种。
研究表明，采用植物纤维制得的聚丙烯复合材料用于成型立柱的仿植绒效果尤其好。
作为本发明所述聚丙烯复合材料的优选实施方式，所述植物纤维为竹纤维、树皮纤维、秸秆纤维、树叶纤维中的至少一种。更优选地，所述植物纤维为竹纤维、秸秆纤维或树叶纤维。
作为本发明所述聚丙烯复合材料的优选实施方式，所述植物纤维的颜色为深色。植物纤维需要染色才可使用。更优选地，所述植物纤维的颜色为黑色、深灰色或深棕色等。
作为本发明所述聚丙烯复合材料的优选实施方式，所述植物纤维的平均长度为0.1～0.8mm。
作为本发明所述聚丙烯复合材料的优选实施方式，所述植物纤维的最大耐热温度为220～260℃。
作为本发明所述聚丙烯复合材料的更优选实施方式，所述增韧剂为乙烯-辛烯无规共聚物，所述增韧剂的门尼粘度为2～45MU。所述增韧剂门尼粘度的测试标准为：ASTM D1646，测试条件为：测试温度为121℃，大转子，预热1分钟，测试4分钟。
作为本发明所述聚丙烯复合材料的优选实施方式，所述聚丙烯复合材料还包括助剂。为了使本发明聚丙烯复合材料的综合性能更好，可以进一步加入助剂。当然，不同助剂对聚丙烯复合材料性能的影响不同，例如，增塑剂可使聚丙烯复合材料的柔软性更好，抗氧剂可以提高聚丙烯复合材料的抗氧化能力。本领域的技术人员可根据实际过程中所需的聚丙烯复合材料的具体性能选择适宜的助剂。
作为本发明所述聚丙烯复合材料的优选实施方式，所述助剂为润滑剂、光稳定剂、抗氧剂中的至少一种。
作为本发明所述聚丙烯复合材料的优选实施方式，所述润滑剂为酰胺类润滑剂、硬脂酸盐类润滑剂中的至少一种；所述光稳定剂为受阻胺类光稳定剂； 所述抗氧剂为受阻酚类抗氧剂、亚磷酸酯类抗氧剂中的至少一种。更优选地，所述抗氧剂为抗氧剂1010、抗氧剂1076、抗氧剂3114、抗氧剂168、抗氧剂RC PEP 36中的至少一种；所述光稳定剂为光稳定剂UV-3808PP5、光稳定剂LA-402XP、光稳定剂LA-402AF中的至少一种。
作为本发明所述聚丙烯复合材料的更优选实施方式，所述润滑剂为0.1～0.3重量份，所述光稳定剂为0.1～0.3重量份，所述抗氧剂为0.2～0.6重量份。
本发明还提供了上述聚丙烯复合材料的制备方法，其包括以下步骤：
(1)按配比称取聚丙烯复合材料中的各组分，加至高速混合机中混合均匀，得到预混物；
(2)将步骤(1)所得预混物加至双螺杆挤出机中进行熔融挤出、造粒，得到所述聚丙烯复合材料。
作为本发明聚丙烯复合材料的制备方法的优选实施方法，所述步骤(1)中，高速混合机的转速为200～300转/分钟，聚丙烯复合材料中的各组分在高速混合机中混合的时间为3～5分钟；所述步骤(2)中，双螺杆挤出机包括10个独立的温控区，从喂料段到机头各区的温度依次为170℃、200℃、200℃、210℃、210℃、205℃、205℃、205℃、200℃、200℃。
与现有技术相比，本发明的有益效果为：本发明添加了大量增韧剂，使得由本发明聚丙烯复合材料制得的立柱可以满足-35℃低温爆破要求，满足安全性能；并且，本发明的聚丙烯复合材料不添加任何填料，它的密度可以控制在0.91g/cm 3以下，做到真正意义上的低密度轻量化。
本发明的聚丙烯复合材料可以用于制备立柱，制备立柱的方法为：先将聚丙烯复合材料中的各组分通过双螺杆挤出机挤出造粒，得到聚丙烯复合材料；然后注塑聚丙烯复合材料，得到立柱。按照此方法得到的立柱可满足立柱的性能要求，且该制备方法较目前包裹绒布制备立柱的方法成本低、效率高。
具体实施方式
为更好地说明本发明的目的、技术方案和优点，下面将结合具体实施例对 本发明作进一步说明。
下述实施例中，聚丙烯的熔融指数是根据ASTM D1238使用2.16kg重量并在230℃的温度测量；增韧剂的门尼粘度的测试标准为：ASTM D1646，测试条件为：测试温度为121℃，大转子，预热1分钟，测试4分钟(即ML1+4@121℃)。
下述实施例中，未作特别说明的物质均从市场上购买得到。
实施例1～5和对比例1～2
实施例1～5和对比例1～2聚丙烯复合材料的组成组分如表1所示。实施例1～5和对比例1～2聚丙烯复合材料的制备方法为：
(1)按配比称取聚丙烯复合材料中的各组分，加至高速混合机中混合3～5分钟至混合均匀，得到预混物；其中，高速混合机的转速为200～300转/分钟；
(2)将步骤(1)所得预混物加至双螺杆挤出机中进行熔融挤出、造粒，干燥、冷却、装包，得到所述聚丙烯复合材料；所述双螺杆挤出机包括10个独立的温控区，从喂料段到机头各区的温度依次为170℃、200℃、200℃、210℃、210℃、205℃、205℃、205℃、200℃、200℃。
表1
Figure PCTCN2019113864-appb-000001
Figure PCTCN2019113864-appb-000002
Figure PCTCN2019113864-appb-000003
上述表1中，聚丙烯BX3900购买自韩国SK，聚丙烯AZ191购买自新加坡TPC。乙烯-辛烯共聚物(POE)均购买自陶氏化学。抗氧剂1010为受阻酚类抗氧剂，抗氧剂168为亚磷酸酯类抗氧剂，抗氧剂1010和抗氧剂168均购买自宜兴市天使合成化学。光稳定剂UV-3808PP5购买自比利时索尔维。酰胺类润滑剂的型号为TR451，购买自美国STRUKTOL；硬脂酸盐类润滑剂的型号为BS-2818，购买自华明泰化工。
申请人还进一步测试了上述实施例1～5和对比例1～2聚丙烯复合材料的性能。具体的测试方法如下：密度按照ISO 1183-1进行测试，拉伸强度和断裂伸长率按照ISO 527-2进行测试(拉伸速度为50mm/min)，弯曲强度和弯曲模量按照ISO 178进行测试(弯曲速度为2mm/min)，悬臂梁缺口冲击按照ISO 180进行测试，熔融指数按照ISO 1133-1/2进行测试(230℃，2.16kg)，热变形温度按照ISO 75-1/2(0.45MPa,平放)进行测试，低温(-35℃)多轴冲击总能量和破坏形式按照ISO 6603-2测试(3mm厚度、4.4m/s速度)。
实施例1～5和对比例1～2聚丙烯复合材料的性能测试结果如表2所示。
表2
Figure PCTCN2019113864-appb-000004
Figure PCTCN2019113864-appb-000005
由表2可见，本发明聚丙烯复合材料的密度较低，在刚韧指标平衡的基础上，低温(-35℃)多轴韧性更佳，可以满足-35℃低温爆破要求。其中，实施例1能量高，YD是最好的状态，而且刚韧性比较平衡。对比例2虽然也多轴性能较好，但刚性如拉伸强度、弯曲强度、弯曲模量等较低，不适用于立柱的实际应用。
效果例1
申请人在研究过程中发现，纤维毛的选择会影响聚丙烯复合材料制成的立柱的仿植绒效果。为了考察纤维毛对聚丙烯复合材料制成的立柱的仿植绒效果的影响，本效果例采用不同种类的纤维毛制成了聚丙烯复合材料，并以此聚丙烯复合材料分别制备立柱，比较了所得立柱的仿植绒效果。
其中，聚丙烯复合材料包括下述重量份的组分：聚丙烯57.8～79.35份，纤维毛0.25～1.0份，增韧剂20～40份、润滑剂0.1～0.3份，光稳定剂为0.1～0.3份，抗氧剂0.2～0.6份；所述聚丙烯为嵌段共聚聚丙烯，聚丙烯的熔融指数为25～60g/10min，聚丙烯的熔融指数是根据ASTM D1238使用2.16kg重量并在230℃的温度测量；所述纤维毛的颜色为深色，平均长度为0.1～0.8mm，最大耐热温度为220～260℃；所述增韧剂为乙烯-丙烯共聚物、乙烯-丁烯共聚物、乙烯-辛烯共聚物中的至少一种；所述润滑剂为酰胺类润滑剂、硬脂酸盐类润滑剂中的至少一种；所述光稳定剂为受阻胺类光稳定剂；所述抗氧剂为受阻酚类抗氧剂、亚磷酸酯类抗氧剂中的至少一种。
所述聚丙烯复合材料的制备方法为：(1)按配比称取聚丙烯复合材料中的各组分，加至高速混合机中混合均匀，得到预混物；(2)将步骤(1)所得预混物加至双螺杆挤出机中进行熔融挤出、造粒，得到所述聚丙烯复合材料。
立柱是通过注塑聚丙烯复合材料得到。
本效果例所采用的纤维毛种类以及所得到立柱的外观效果如表3。
表3
Figure PCTCN2019113864-appb-000006
由表3可见，采用竹纤维、秸秆纤维与树叶纤维效果较好，制得的聚丙烯复合材料用于立柱的仿植绒效果明显，树皮纤维具有中等植绒效果。可见，含有植物纤维的聚丙烯复合材料可用于制备汽车立柱；而非植物纤维例如玻纤纤维，碳纤维与麻纤维无植绒效果。
效果例2
纤维毛的颜色、长度和最大耐热温度的选择会影响聚丙烯复合材料制成的立柱的仿植绒效果。为了考察纤维毛对聚丙烯复合材料制成的立柱的仿植绒效果的影响，本效果例采用不同颜色、长度和最大耐热温度的纤维毛制成了聚丙烯复合材料，并以此聚丙烯复合材料分别制备立柱，比较了所得立柱的仿植绒效果。
其中，聚丙烯复合材料包括下述重量份的组分：聚丙烯57.8～79.35份，纤维毛0.25～1.0份，增韧剂20～40份、润滑剂0.1～0.3份，光稳定剂为0.1～0.3份，抗氧剂0.2～0.6份；所述聚丙烯为嵌段共聚聚丙烯，聚丙烯的熔融指数为25～60g/10min，聚丙烯的熔融指数是根据ASTM D1238使用2.16kg重量并在 230℃的温度测量；所述纤维毛为竹纤维、树皮纤维、秸秆纤维、树叶纤维中的至少一种；所述增韧剂为乙烯-丙烯共聚物、乙烯-丁烯共聚物、乙烯-辛烯共聚物中的至少一种；所述润滑剂为酰胺类润滑剂、硬脂酸盐类润滑剂中的至少一种；所述光稳定剂为受阻胺类光稳定剂；所述抗氧剂为受阻酚类抗氧剂、亚磷酸酯类抗氧剂中的至少一种。
所述聚丙烯复合材料以及立柱的制备方法同效果例1。
本效果例所采用的纤维毛的颜色、长度和最大耐热温度以及所得到立柱的外观效果如表4。
表4
Figure PCTCN2019113864-appb-000007
由表4可见，植物纤维为黑色/深色、平均长度0.1-0.8mm、最大耐热温度220-260℃时的仿植绒效果最佳，以此制得的聚丙烯复合材料用于立柱的优选仿值绒外观最佳。
最后所应当说明的是，以上实施例仅用以说明本发明的技术方案而非对本发明保护范围的限制，尽管参照较佳实施例对本发明作了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的实质和范围。

Claims (12)

  1. 一种聚丙烯复合材料，其特征在于，包括下述重量份的组分：聚丙烯57.8～79.35份，纤维毛0.25～1.0份，增韧剂20～40份。
  2. 如权利要求1所述的聚丙烯复合材料，其特征在于，如下(a)～(c)中的至少一项：
    (a)所述聚丙烯为嵌段共聚聚丙烯，所述聚丙烯的熔融指数为25～60g/10min，所述聚丙烯的熔融指数是根据ASTM D1238使用2.16kg重量并在230℃的温度测量；
    (b)所述纤维毛为植物纤维；
    (c)所述增韧剂为乙烯-丙烯共聚物、乙烯-丁烯共聚物、乙烯-辛烯共聚物中的至少一种。
  3. 如权利要求2所述的聚丙烯复合材料，其特征在于，所述植物纤维为竹纤维、树皮纤维、秸秆纤维、树叶纤维中的至少一种。
  4. 如权利要求2或3所述的聚丙烯复合材料，其特征在于，所述植物纤维的颜色为深色。
  5. 如权利要求2或3所述的聚丙烯复合材料，其特征在于，所述植物纤维的平均长度为0.1～0.8mm。
  6. 如权利要求2或3所述的聚丙烯复合材料，其特征在于，所述植物纤维的最大耐热温度为220～260℃。
  7. 如权利要求2所述的聚丙烯复合材料，其特征在于，所述增韧剂为乙烯-辛烯无规共聚物，所述增韧剂的门尼粘度为2～45MU。
  8. 如权利要求1所述的聚丙烯复合材料，其特征在于，还包括助剂。
  9. 如权利要求8所述的聚丙烯复合材料，其特征在于，所述助剂为润滑剂、光稳定剂、抗氧剂中的至少一种。
  10. 如权利要求9所述的聚丙烯复合材料，其特征在于，所述润滑剂为酰胺 类润滑剂、硬脂酸盐类润滑剂中的至少一种；所述光稳定剂为受阻胺类光稳定剂；所述抗氧剂为受阻酚类抗氧剂、亚磷酸酯类抗氧剂中的至少一种。
  11. 如权利要求9或10所述的聚丙烯复合材料，其特征在于，所述润滑剂为0.1～0.3重量份，所述光稳定剂为0.1～0.3重量份，所述抗氧剂为0.2～0.6重量份。
  12. 如权利要求1～11任一项所述聚丙烯复合材料的制备方法，其特征在于，包括以下步骤：
    (1)按配比称取聚丙烯复合材料中的各组分，加至高速混合机中混合均匀，得到预混物；
    (2)将步骤(1)所得预混物加至双螺杆挤出机中进行熔融挤出、造粒，得到所述聚丙烯复合材料。
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