阅读说明：本技术 Hdpe与尼龙6共混物用相容剂及其制备工艺和应用 (Compatilizer for HDPE (high-density polyethylene) and nylon 6 blend and preparation process and application thereof ) 是由 储文明 徐进 于 2020-06-19 设计创作，主要内容包括：本发明公开了一种HDPE与尼龙6共混物用相容剂,本发明在HDPE挤出过程中,在引发剂2,5-二甲基-2,5-双(叔丁基过氧基)己烷(DBPH)和催化剂二异丙基乙醇铵的作用下,在HDPE分子链上引入酰胺极性基团的功能性单体；N-(异-丁氧基甲基)甲基丙烯酰胺和具有协同效应的功能性单体：N-乙烯基己内酰胺。接枝反应后的HDPE接枝聚合物作为HDPE与尼龙6共混物的相容剂,在两相界面起到“偶联作用”,增加两相界面粘合力,使得制品不仅具有较高的物理机械性能,而且具有优异的阻隔性能。(The invention discloses a compatibilizer for a blend of HDPE and nylon 6, which is characterized in that in the process of extruding HDPE, a functional monomer of amide polar groups is introduced into a HDPE molecular chain under the action of an initiator 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane (DBPH) and a catalyst ammonium diisopropylethanolate; n- (iso-butoxymethyl) methacrylamide and a functional monomer with a synergistic effect: n-vinyl caprolactam. The HDPE graft polymer after the grafting reaction is used as a compatilizer of the HDPE and nylon 6 blend, plays a role in coupling at a two-phase interface, increases the adhesive force of the two-phase interface, and ensures that the product not only has higher physical and mechanical properties, but also has excellent barrier property.)

The compatilizer for the HDPE and nylon 6 blend is characterized by comprising the following components in parts by weight:

HDPE 100 parts

5-6 parts of N- (iso-butoxymethyl) methacrylamide

3-5 parts of N-vinyl caprolactam

0.3-0.5 part of 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane

0.2-0.3 part of diisopropylethanolammonium

10100.2-0.25 part of antioxidant

0.8-1.0 part of EBS.

2. The process for preparing the compatibilizer for HDPE and nylon 6 blends according to claim 1, comprising the steps of:

s1, extruding on a double-screw extruder with the length-diameter ratio L/D (equal to 48), wherein the double-screw extruder is provided with 12 sections and 3 feed inlets, the first feed inlet is positioned at the position of the extruder 1D, the second feed inlet is positioned at the position of SD of the fifth section of the extruder, and the third feed inlet is positioned at the position of the extruder 7D;

s2, adding HDPE into a feed inlet at the first section 1D of the 120r/min double-screw extruder;

s3, mixing N- (iso-butoxymethyl) methacrylamide, N-vinyl caprolactam, 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane and diisopropylethanol ammonium according to a ratio, and adding the mixture into a feed inlet at a position 5D of a fifth section of the extruder under the pressure of 1.2-1.5 Mpa;

s4, mixing the antioxidant 1010 and the EBS, and adding the mixture into a feed inlet at the seventh section 7D of the extruder;

s5, grafting reaction is carried out, the extrusion processing temperature is gradually increased from 140-150 ℃ of the first section to 220 ℃ of the 8 th section, and the extrusion temperature of the tail section of the extruder is gradually decreased to about 160-170 ℃.

3. The process for preparing a compatibilizer for HDPE and nylon 6 blends according to claim 2 wherein the process temperature for each segment in S5 is set as follows:

140 to 150 ℃, 170 to 180 ℃, 180 to 190 ℃, 190 to 200 ℃, 200 to 210 ℃, 210 to 220 ℃, 200 to 210 ℃, 190 to 200 ℃, 180 to 190 ℃ and 160 to 170 ℃.

4. The process for preparing the compatibilizer for HDPE and nylon 6 blend in claim 2, wherein the feeding rate of HDPE in S2 in S3 is 75kg/h, the feeding rate of the mixture in S3 is 4.7kg/h, and the feeding rates of the antioxidant 1010 and EBS in S4 are 0.52 kg/h.

5. The compatibilizer-modified HDPE and nylon blend of claim 1 comprising the following components in parts by weight:

HDPE 100 parts

625 portions of nylon

6 portions of compatilizer

10100.2-0.25 part of antioxidant

0.8-1.0 part of EBS.

Technical Field

The invention relates to a compatibilizer for HDPE and nylon 6 blend, a preparation process and application thereof.

Background

HDPE (high density polyethylene) is a polymer with better comprehensive performance, and a packaging material taking HDPE as a main raw material is replacing the traditional metal or glass packaging material and is widely applied to food packaging, medicine packaging and the like. However, HDPE materials have poor barrier properties, which limits their range of applications. Nylon 6 (polyamide 6) is a special material with high strength and high barrier property, and the barrier property of HDPE material can be improved by doping nylon 6 into the HDPE material. However, since the HDPE material is a non-polar polymer and the nylon 6 is a polar polymer, the material obtained by pure blending has poor mechanical properties and limited improvement of barrier properties.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defect of poor barrier property of HDPE material in the prior art, and provides a compatilizer for HDPE-nylon 6 blend and a preparation process thereof

In order to solve the technical problems, the invention provides the following technical scheme:

the compatilizer for the HDPE and nylon 6 blend comprises the following components in parts by weight:

HDPE 100 parts

5-6 parts of N- (iso-butoxymethyl) methacrylamide

3-5 parts of N-vinyl caprolactam

0.3-0.5 part of 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane

0.2-0.3 part of diisopropylethanolammonium

10100.2-0.25 part of antioxidant

0.8 to 1.0 portion of EBS

The preparation process of the compatilizer for the HDPE and nylon 6 blend comprises the following steps:

s1, extruding on a double-screw extruder with the length-diameter ratio L/D (equal to 48), wherein the double-screw extruder is provided with 12 sections and 3 feed inlets, the first feed inlet is positioned at the position of the extruder 1D, the second feed inlet is positioned at the position of SD of the fifth section of the extruder, and the third feed inlet is positioned at the position of the extruder 7D;

s2, feeding HDPE into the feed inlet at the first section 1D of the 120r/min double-screw extruder at a feeding rate of 75 kg/h;

s3, mixing N- (iso-butoxymethyl) methacrylamide, N-vinyl caprolactam, 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane and diisopropylethanol ammonium according to a ratio, and adding the mixture to a feed inlet of a fifth section 5D of the extruder at a feeding rate of 4.7kg/h under a pressure of 1.2-1.5 MPa;

s4, mixing the antioxidant 1010 and EBS, and feeding at a rate of 0.52kg/h to a feed port at the seventh section 7D of the extruder

S5, grafting reaction is carried out, the extrusion processing temperature is gradually increased from 140-150 ℃ of the first section to 220 ℃ of the 8 th section, and the extrusion temperature of the tail section of the extruder is gradually decreased to about 160-170 ℃.

Further, the process temperature of each section in S5 is set as follows:

140 to 150 ℃, 170 to 180 ℃, 180 to 190 ℃, 190 to 200 ℃, 200 to 210 ℃, 210 to 220 ℃, 200 to 210 ℃, 190 to 200 ℃, 180 to 190 ℃ and 160 to 170 ℃.

Further, in S3, the compound material obtained in S1 was fed at a feed rate of 85kg/h, and the running rate of the twin-screw extruder was 110 r/min.

The invention has the following beneficial effects: in the HDPE extrusion process, a functional monomer of amide polar groups is introduced into an HDPE molecular chain under the action of an initiator 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane (DBPH) and a catalyst ammonium diisopropyl ethoxide; n- (iso-butoxymethyl) methacrylamide and a functional monomer with a synergistic effect: n-vinyl caprolactam. The HDPE graft polymer after the grafting reaction is used as a compatilizer of the HDPE and nylon 6 blend, plays a role in coupling at a two-phase interface, increases the adhesive force of the two-phase interface, and ensures that the product not only has higher physical and mechanical properties, but also has excellent barrier property.

Detailed Description

The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.