High bath-strength polypropylene and method for preparing same

A technology of high melt strength and polypropylene, applied in the field of composite materials, can solve the problems of high cost and complicated process, and achieve the effects of good modulus, low preparation cost and simple preparation method

Inactive Publication Date: 2005-03-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new compound made from pure propyleneglycan (PPG) can be used for making plastic products that are stronger but have less flexibility or durability compared to traditional methods like injection-molding. It also improves its overall quality by reducing shrinkage during manufacturing processes while maintaining good dimensions over time.

Problems solved by technology

This patents discusses different ways to make strong and durable polyolefms (PP) without losing their original qualities like elongated shape retention). One way involves modifying them chemically beforehand, such as reactively treatments involving radiation treatment or melting techniques. Another approach involve mixing certain types of material together while still maintaining good quality. These modifications help reduce stress cracking when making foams from propyl ethyl cyclohexane solution under pressure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The composition and weight percentage of the high melt strength polypropylene are: polypropylene: 60%, compatibilizer maleic anhydride grafted polypropylene: 30%, clay organically modified montmorillonite: 10%.

[0016] Weigh 600g of polypropylene, 300g of maleic anhydride grafted polypropylene and 100g of organically modified montmorillonite, stir in a high-speed mixer for 15 minutes to mix evenly, and then use a twin-screw extruder to knead the premix at 170°C , extruded, granulated, and molded into standard splines for performance testing. The performance is shown in Table 1.

Embodiment 2

[0018] The composition and weight percentage of the high melt strength polypropylene are: polypropylene: 96%, compatibilizer (maleic anhydride grafted polypropylene): 3%, clay (organically modified montmorillonite): 1%.

[0019] Weigh 960g of polypropylene, 30g of maleic anhydride grafted polypropylene and 10g of organically modified montmorillonite, stir in a high-speed mixer for 20 minutes to mix evenly, and then use an internal mixer to mix and crush the premix at 190°C , molded into standard splines, and performed performance tests. The properties are shown in Table 1.

Embodiment 3

[0021] The composition and weight percentage of the high melt strength polypropylene are: polypropylene: 72%, compatibilizer (maleic anhydride grafted polypropylene): 21%, clay (organically modified montmorillonite): 7%.

[0022] Weigh 720g of polypropylene, 210g of maleic anhydride grafted polypropylene and 70g of organically modified montmorillonite, stir in a high-speed mixer for 10 minutes to mix evenly, and then use an internal mixer to mix and crush the premix at 210°C , molded into standard splines, and performed performance tests. The properties are shown in Table 1.

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Abstract

The invention discloses a resin composition and its preparing process, wherein the resin composition comprises alkali metal salt (A) whose content is 0.1-20 umol/g converted into alkali metal, carboxylic acid and its salt whose content is 2 umol/g converted into carboxylic acid radicals, vinyl with 5-60 mol% of content and 80-90 mol% of saponification degree.

Description

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Claims

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Application Information

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Owner SHANGHAI JIAO TONG UNIV
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