MQ Resin: Methyl/Phenyl & Mw Nkɛntɛnso PSA Adhesion

Jiangsu Aokai New Materials , a ɛyɛ PTFE teyp a ɛyɛ hyew kɛse a wɔyɛ no kɛse no ma wo mfiridwuma mu nhwehwɛmu a ɛyɛ adwumayɛfo de.

Polarity, steric akwanside a organic akuw ne aggregation nhyehyɛe a molecule nkɔnsɔnkɔnsɔn wɔ MQ silicone resin ne nneɛma atitiriw a ɛhwɛ adwumayɛ kari pɛ a silicone nhyɛso-sensitive adhesives (PSA).Ne tiawa mu: increasing phenyl content optimizes mfitiase tack, kura tumi ne peel ahoɔden bere koro mu bere a molecule mu duru ne molecule mu duru kyekyɛ di seesaw mmara a wɔtaa di akyi — molecule mu duru a ɛkorɔn ma tumi a wɔde kura mu tu mpɔn nanso ɛde mfitiase tack bɔ afɔre; molecule mu duru kyekyɛ a ɛtrɛw yɛ ɔkwan a etu mpɔn a wɔfa so kari pɛ wɔ nneɛma atitiriw abiɛsa a wɔde nkata so no mu.

1. Methyl / Phenyl Ratio: Intrinsic Adwumayɛ Nsakrae denam Nnuru Nhyehyɛe so

Sɛ wɔde phenyl akuw (-C6H5) besi methyl akuw (-CH3) fã bi ananmu a, ɛyɛ ɔkwan a etu mpɔn a wɔfa so yɛ nsakrae wɔ molecule mu:

·  Enhanced intermolecular force : Benzene ring no ma π-π intermolecular nkitahodi a emu yɛ den, ma adhesive no ahoɔden a ɛka bom no kɔ soro kɛse, a titiriw no ɛma tumi a wɔde kura mu ne ahoɔden a wɔde peel no tu mpɔn.

·  Nkɔanim molecular nkɔnsɔnkɔnsɔn rigidity : Phenyl akuw wɔ steric akwanside kɛse, a ɛto silicone nkɔnsɔnkɔnsɔn atitiriw a ɛkyinkyini no ano hye na ɛtew nkɔnsɔnkɔnsɔn a ɛyɛ mmerɛw so. Eyi so ba tumi a wokura mu mfaso nanso ɛtaa ma mfitiase tack no yɛ mmerɛw.

·  Wettability a ɛkɔ anim : Phenyl nsakrae ma silicone PSA affinity ne substrate surfaces nya nkɔso, ɛhyɛ interfacial bonding ho nkuran, na ɛma mfitiase tack ne peel ahoɔden nyinaa tu mpɔn.

2. Molecular Weight & Distribution: Adwumayɛ ho Mmara denam Honam fam Entanglement & Aggregation State so

Dwumadi akuw di nnuru nhyehyɛe so , bere a molecule mu duru ne molecule mu duru kyekyɛ (Polydispersity Index, PDI) di honam fam nhyehyɛe so :

Molekyul mu duru (Mw) .

Ahoɔden a ɛka bom no fi honam fam a ɛkyekyere polymer nkɔnsɔnkɔnsɔn no mu titiriw.

·  Mw a ɛkorɔn no yɛ denser entanglement network na ɛma tumi a wɔde kura mu no tu mpɔn kɛse.

·  Mw a ɛkɔ soro dodo ma molecule nkɔnsɔnkɔnsɔn yɛ den na ɛnyɛ nea ɛyɛ mmerɛw, na ɛma mfitiase tack ne peel ahoɔden so tew.

Molekyul Mu duru a Wɔkyekyɛ (MWD) .

·  Narrow distribution : Uniform adwumayɛ, mmerɛw botae optimization ma agyapade biako te sɛ soro mfiase tack.

·  Broad distribution : Adwumayɛ a ɛne ne ho hyia a ɛka ho. Nneɛma nketenkete a emu duru yɛ kɛse yɛ ntama nnompe a ɛyɛ den na ama wɔanya ahoɔden a ɛka bom ne tumi a wɔde kura mu; afã horow a emu duru sua yɛ adwuma sɛ emu srade ne nsu a ɛma nsu yɛ ntɛmntɛm, ɛma nkɔnsɔnkɔnsɔn no tu mpɔn na ɛma nsu a ɛwɔ soro ntɛmntɛm no tu mpɔn na ama wɔahwɛ ahu sɛ mfitiase tack pa, na ɛma adwumayɛ a ɛkari pɛ wɔ ne nyinaa mu.

3. Synergistic Optimization a ɛfa M / Q Ratio, Resin Dosage ne Silicone Rɔba Viscosity ho

Methyl/phenyl ratio ne molecule mu duru na ɛkyerɛ sɛnea MQ resin no wɔ awosu mu; bere a M / Q ratio, resin to silicone rɔba ratio ne silicone rɔba viscosity yɛ tẽẽ nsakrae parameters wɔ formula engineering, a ɛsɛ sɛ ɛne synergistically hyia.

M/Q Nkyɛmu

M/Q ratio tẽẽ kyerɛ molecule mu duru, hydroxyl a ɛwɔ mu ne sɛnea ɛne silicone rubber hyia.M/Q molar ratio a eye sen biara ma silicone PSA no taa yɛ 0.6 ~ 1.2 .Sɛ nhwɛso no, aduruyɛ-grade PSA gye M/Q bo a eye sen biara a ɛyɛ bɛyɛ 0.78; resin a M/Q 0.6-0.9 a wɔde silicone rɔba (viscosity 100×10−4 m²/s) afrafra wɔ mass ratio 2:3 mu no nya adwumayɛ a ɛkyɛn so a ɛyɛ ade nyinaa a ɛyɛ adhesive.

Resin / Silicone Rɔba a Wɔde Afrafra Nkyɛmu

Saa ratio yi ne key lever a ɛkari pɛ wɔ abiɛsa core properties (mfiase tack, kura tumi, peel ahoɔden).

·  Resin a ɛkɔ soro no ma cohesion, kura tumi ne peel ahoɔden tu mpɔn nanso ɛtew mfitiase tack so.

·  Rɔba a ɛkɔ soro no kyerɛ nea ɛne eyi bɔ abira.

Sɛ nhwɛso no, sɛ wɔma MQ resin dodow a ɛkɔ soro kodu 107 silicone rɔba fi 1.2 kosi 2.5 a, ɛbɛma tumi a wɔde kura mu ne 180° peel ahoɔden akɔ soro bere a ɛso tew mfiase no tack.Wɔ nnuru a wɔde yɛ adwuma mu no, silicone resin ne silicone rɔba dodow a ɛwɔ mu no taa yɛ 45:55 ~ 75:25.

Silicone Rɔba a Ɛyɛ Nwene

Molekyul mu duru a ɛda adi wɔ viscosity mu no na ɛkyerɛ rheological su atitiriw a ɛwɔ adhesive nhyehyɛe no mu na ehia sɛ ɛne MQ resin.Low-viscosity silicone rubber hyia yiye, ɛyɛ papa ma mfitiase tack ne peel ahoɔden, nanso ebetumi asɛe tumi a wɔde kura mu.

4. Formula Design Nnyinasosɛm a ɛfa Adwumayɛ mu Kari pɛ ho

Wɔ silicone PSA formulation nhyehyɛe mu no, indexes atitiriw abiɛsa no — mfiase tack, tumi a wɔde kura mu, 180° peel ahoɔden  — wobetumi ahwɛ so pɛpɛɛpɛ denam akwan titiriw abien so:

·  Phenyl nsakrae — multiplicative optimization : Phenyl doping a ɛfata ma nneɛma abiɛsa no nyinaa tu mpɔn bere koro mu, na ɛbu atetesɛm seesaw anohyeto no so.

·  Molecular weight & distribution adjustment — additive trade-off : Pɛpɛɛpɛ control of molecular weight ne distribution hu customized kari pɛ ntam mfiase tack ne kura tumi ma ɛsono application scenarios.

Wɔ mfiridwuma mu nneɛma a wɔyɛ mu no, ɔkwan a wɔtaa fa so yɛ no ne molecule weight distribution base resin a ɛtrɛw ne phenyl nsakrae a ɛkɔ fam  ma ɛkari pɛ wɔ processability ne adhesion performance.For ultra-high temperature resistance ne harsh chemical environments, high-phenyl-content MQ resin ne ano aduru a wɔpɛ.

Atifi hɔ mfiridwuma ho nsɛm no yɛ nea Jiangsu Aokai New Materials Technology Co., Ltd. na ɛde mae.

Sɛ wopɛ sɛ wuhu nsɛm a ɛkɔ akyiri parameters, application scenarios ne customized ano aduru ma yɛn nyinaa product line: PTFE high-temperature ntama, PTFE high-temperature tape, PTFE high-temperature mesh belt, seamless fusing machine belt, single-sided PTFE ntama, high-temperature resistant conveyor belt ne high-temperature resistant fiberglass ntama, yɛsrɛ wo, di yɛn ho nkɔmmɔ:

·  Owura Guo: +86 18944819998 Ɔde ne nsa kyerɛɛ ne so

·  Owura Liu: +86 13705266308 Ɔde ne nsa kyerɛɛ ne so

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