A high strength gap blend

A blend and high-strength technology, applied in the field of high-strength GAP/HTPE blends, can solve problems such as high viscosity, and achieve the effect of simple selection and good physical compatibility

Active Publication Date: 2021-09-17
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, GAP / PET, GAP / HTPB blends have a high viscosity when used in explosives, and GAP / PET, GAP / HTPB blends are physically incompatible with plasticizers DOA, DOS and triacetin commonly used in explosives, so The above blends are currently not available in cast PBX

Method used

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  • A high strength gap blend

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The present invention is implemented with reference to the following composition by mass percentage: 55.51% GAP, 41.00% HTPE, 3.49% curing agent N-100, 0.02% catalyst TPB.

[0016] Preparation:

[0017] (1) Raw material pretreatment

[0018] Weigh 55.51g of GAP and 41.00g of HTPE into the kneading pot, and mix under vacuum at 60°C for 2 hours.

[0019] (2) glue mixing

[0020] Weigh 3.49g of curing agent N-100 and add it to the glue solution for vacuum mixing for 30min. Weigh 0.02g of TPB into the kneading pot, vacuumize and mix and stir for 15min.

[0021] (3) Test sample preparation

[0022] Pour the glue solution into a polytetrafluoroethylene mold, cure at 40°C for 3 days, and cure at 60°C for 4 days.

Embodiment 2

[0024] The present invention is implemented with reference to the following composition by mass percentage: 57.00% GAP, 40.00% HTPE, 3.00% curing agent N-100, 0.02% catalyst TPB.

[0025] Preparation:

[0026] (1) Raw material pretreatment

[0027] Weigh 57.00gGAP and 40.00gHTPE into the kneading pot, and mix under vacuum at 60°C for 2h.

[0028] (2) glue mixing

[0029] Weigh 3.00g of curing agent N-100 and add it to the glue solution for vacuum mixing for 30min. Weigh 0.02g of TPB into the kneading pot, vacuumize and mix and stir for 15min.

[0030] (3) Test sample preparation

[0031] Pour the glue solution into a polytetrafluoroethylene mold, cure at 40°C for 3 days, and cure at 60°C for 4 days.

Embodiment 3

[0033] The present invention is implemented with reference to the following composition by mass percentage: 50.00% GAP, 46.00% HTPE, 4.00% curing agent N-100, and 0.02% catalyst TPB.

[0034] Preparation:

[0035] (1) Raw material pretreatment

[0036] Weigh 50.00gGAP and 46.00gHTPE into the kneading pot, and mix under vacuum at 60°C for 2h.

[0037] (2) glue mixing

[0038] Weigh 4.00g of curing agent N-100 and add it to the glue solution for vacuum mixing for 30min. Weigh 0.02g of TPB into the kneading pot, vacuumize and mix and stir for 15min.

[0039] (3) Test sample preparation

[0040] Pour the glue solution into a polytetrafluoroethylene mold, cure at 40°C for 3 days, and cure at 60°C for 4 days.

[0041] The cured elastomer film is made into a standard dumbbell shape, and the tensile strength and elongation of the sample are tested by an Instron-4505 material testing machine. The method is based on GJB770B-2005, the tensile rate is 500mm / min, and the test temperat...

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Abstract

The invention discloses a high-strength GAP blend to solve the problems of poor mechanical properties of the existing GAP and physical incompatibility between the existing blend and plasticizers commonly used in explosives. In the invention, GAP and hydroxyl-terminated polyether are blended, N-100 is used as a curing agent, and triphenyl bismuth is used as a catalyst. The tensile strength of the present invention is 30% higher than that of pure GAP, and the elongation is 61% higher.

Description

technical field [0001] The invention relates to a high-strength GAP / HTPE blend, which is mainly used as a binder for pouring PBX. Background technique [0002] Hydroxyl-terminated azide polyether (GAP) has the advantages of high energy density, good safety, environmental friendliness, and low characteristic signal. However, due to its poor mechanical properties, when it is applied in pouring PBX, the formed drug column can be crushed by hand. Unable to withstand the external load during transportation, storage and service. Blending is one of the very commonly used and effective methods in polymer modification. In order to improve the mechanical properties of GAP adhesives, Li Ping et al. used PET and GAP blending. Research shows that this blend has the same properties that pure GAP and pure PET cannot. Compared with the superior performance, the tensile strength is significantly improved, and the elongation is higher; especially when the weight ratio of the two is similar (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/50
CPCC08G18/48C08G18/482C08G18/5021
Inventor 陈春燕余然倪冰牛余雷席鹏王浩
Owner XIAN MODERN CHEM RES INST
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